⑴ c語言程序設計學生成績查詢系統
#include"stdio.h"
#include"string.h"
#define N 1000
void menu();
int password();
int de();
int uninque(struct STUDENT shu[],int len,int xuehao);
void shuchu(struct STUDENT shu[],int len);
void send(struct STUDENT shu[],int len);
int readFromFile(struct STUDENT shu[]);
void chaxun(struct STUDENT shu[],int len);
void paixu(struct STUDENT shu[],int len);
struct STUDENT
{
int num;
char name[10];
int score;
} shu[N];
main()
{ int len=0,key,choice;
do {
key=password();
}while(key==0);
while(1)
{ menu();
printf("請輸入選項<1,2,3,4,5,6,7>\n");
scanf("%d",&choice);
switch(choice)
{
case 1:printf("輸入信息函數\n"); len=de(shu,len); break;
case 2:printf("輸出函數被調用\n"); shuchu(shu,len); break;
case 3:printf("保存到文件函數被調用\n"); send(shu,len); break;
case 4:printf("從文件讀函數被調用\n"); len=readFromFile( shu); break;
case 5:printf("按學號查詢函數被調用\n"); chaxun(shu,len); break;
case 6:printf("按成績排序函數被調用\n"); paixu(shu,len); break ;
case 7:exit(0);break;
}
}
}
void menu()
{
printf("\n");
printf(" *******************************************\n");
printf(" * 學生成績管理系統2.0 *\n");
printf(" * 1.輸入信息 *\n");
printf(" * 2.輸出信息 *\n");
printf(" * 3.保存到文件 *\n");
printf(" * 4.從文件讀 *\n");
printf(" * 5.按學號查詢 *\n");
printf(" * 6.按成績排序（由大到小） *\n");
printf(" * 7.程序結束 *\n");
printf(" *******************************************\n");
}
int password()
{
char a[100];
char key[]="asd";
printf("請輸入密碼\n");
scanf("%s",&a);
if(strcmp(a,key)==0)
return 1;
else
return 0;
}
int de(struct STUDENT shu[],int len)
{ int i=len;
int flag=0;
int xuehao,bank,chengji;
while(i<N)
{
while(1)
{
printf("學號");
scanf("%d",&xuehao);
if(xuehao==0)
{ flag=1;
break;
}
bank=uninque(shu,i,xuehao);
if(bank==0)
{ shu[i].num=xuehao;
break;}
}
if(flag==1)
break;
printf("姓名");
scanf("%s",&shu[i].name);
while (1)
{
printf("成績");
if(scanf("%d",&chengji)==1)
{break;}
printf("輸入格式錯誤，請重新輸入！");
while(getchar()!='\n')
continue;
}
while(getchar()!='\n')
continue;
shu[i].score=chengji;
i++;
}
return i;
}
int uninque(struct STUDENT shu[],int len,int xuehao)
{ int i;
int bank=0;
for (i=0;i<len;i++)
{
if(xuehao==shu[i].num)
bank=1;
}
return bank;
}
void shuchu(struct STUDENT shu[],int len)
{
int i;
printf("%-4s %-10s %-3s","學號","姓名","成績\n\n");
for(i=0;i<len;i++)
{
printf("%-4d %-10s %-3d",shu[i].num,shu[i].name,shu[i].score);
printf("\n");
}
printf("\n\n");
}
void send(struct STUDENT shu[],int len)
{
int i;
FILE *fp;
fp=fopen("d:\\chegnji.txt","wb");
if(fp==NULL)
{
printf("打開文件出錯！\n");
exit(0);
}
for(i=0;i<len;i++)
fwrite(shu+i,sizeof(struct STUDENT),1,fp);
fclose(fp);
}
int readFromFile(struct STUDENT shu[])
{
FILE *fp=NULL;
int i=0;
fp=fopen("d:\\chegnji.txt","rb");
if(fp!=NULL)
{
printf("%-4s %-10s %-3s","學號","姓名","成績\n\n");
while(!feof(fp))
{
if(i>=N)
break;
if(fread(shu+i,sizeof(struct STUDENT),1,fp))
printf("%-4d %-10s %-3d",shu[i].num,shu[i].name,shu[i].score);
printf("\n");
i++;
}
fclose(fp);
}
i=i-1;
return i;
}
void chaxun(struct STUDENT shu[],int len)
{
int i,nue,b=0;
while(1)
{printf("input the student number (input'0' close) ");
scanf("%d",&nue);
b=0;
if(nue==0)
break;
for (i=0;i<len;i++)
{
if(nue==shu[i].num)
{ printf("%-4s %-10s %-3s","學號","姓名","成績\n\n");
printf("%-4d %-10s %-3d\n",shu[i].num,shu[i].name,shu[i].score);
b=1;
}
}
if(b==0)
printf("The number is not exist!\n");
}
}
void paixu(struct STUDENT shu[],int len)
{
int i,j;
struct STUDENT temp;
printf("%-4s %-10s %-3s","學號","姓名","成績\n\n");
for(i=0;i<len;i++)
{
for(j=i;j<len;j++)
{
if(shu[j].score>shu[i].score)
{
temp=shu[j];
shu[j]=shu[i];
shu[i]=temp;
}
}
printf("%-4d %-10s %-3d\n",shu[i].num,shu[i].name,shu[i].score);
}
}
⑵ C語言考試成績分析系統
你好！程序什麼時間要呢，可以嘗試完成
⑶ 用C語言編一個學生成績管理系統`(要求原創)
我們的課設我自己做的，老師評的優秀。你自己看一下吧
#include "graphics.h"
#define SIZE 100
#include <conio.h>
#include<stdio.h>
int N;
struct student
{
int No ;
int age;
char name[10];
char sex;
int computerscore;
int Englishscore;
int Mathscore;
int Sum[10];
int aver[10];
char Dengji[10];
}stud[SIZE];
FILE*fp;
int i;
int j;
int m;
int n;
int o;
void input()
{
i=1;
printf("please input student data\n");
while(i<=N)
{
printf("No :");
scanf("%d",&stud[i].No );
printf("name:");
scanf("%s",stud[i].name);
printf("age");
scanf("%d",&stud[i].age);
printf("sex");
getchar();
scanf("%c",&stud[i].sex);
printf("computerscore:");
scanf("%d",&stud[i].computerscore);
printf("Englishscore:");
scanf("%d",&stud[i].Englishscore);
printf("Mathscore:");
scanf("%d",&stud[i].Mathscore);
i++;
}
}
chuli(struct student stud[])
{
int k,m;
struct student t;
int Sum[SIZE],aver[SIZE];
for(i=1;i<=N;i++)
Sum[i]=stud[i].computerscore+stud[i].Englishscore+stud[i].Mathscore;
for(i=1;i<=N;i++)
aver[i]=Sum[i]/3;
for(i=1;i<=N;i++)
{
k=i;
{
for(j=i+1;j<=N;j++)
if(Sum[i]<Sum[j])
k=j;
if(k!=i)
{
t=stud[i];stud[i]=stud[k];stud[k]=t;
m=Sum[i];Sum[i]=Sum[k];Sum[k]=m;
n=aver[i];aver[i]=aver[k];aver[k]=n;
}
}
}
for(i=1;i<=N;i++)
{
if(aver[i]>=90)
{printf("%d\t%s\t%d\t%c\t%d\t%d\t%d\t%d\t%d\tA\n",stud[i].No ,stud[i].name,stud[i].age,stud[i].sex,stud[i].computerscore,stud[i].Englishscore,stud[i].Mathscore,Sum[i],aver[i]);
printf("\t\t\t\t\twelldone!please go on!\n");
}
else if(aver[i]>=80)
printf("%d\t%s\t%d\t%c\t%d\t%d\t%d\t%d\t%d\tB\n",stud[i].No ,stud[i].name,stud[i].age,stud[i].sex,stud[i].computerscore,stud[i].Englishscore,stud[i].Mathscore,Sum[i],aver[i]);
else if(aver[i]>=70)
printf("%d\t%s\t%d\t%c\t%d\t%d\t%d\t%d\t%d\tC\n",stud[i].No ,stud[i].name,stud[i].age,stud[i].sex,stud[i].computerscore,stud[i].Englishscore,stud[i].Mathscore,Sum[i],aver[i]);
else if(aver[i]>=60)
printf("%d\t%s\t%d\t%c\t%d\t%d\t%d\t%d\t%d\tD\n",stud[i].No ,stud[i].name,stud[i].age,stud[i].sex,stud[i].computerscore,stud[i].Englishscore,stud[i].Mathscore,Sum[i],aver[i]);
else
{
printf("%d\t%s\t%d\t%c\t%d\t%d\t%d\t%d\t%d\tE\n",stud[i].No ,stud[i].name,stud[i].age,stud[i].sex,stud[i].computerscore,stud[i].Englishscore,stud[i].Mathscore,Sum[i],aver[i]);
printf("\t\t\t\t\tYou should work hard!\n");
}
}
}
Maxcomputerscore(struct student stud[])
{
int i=0,Max;
Max=stud[i].computerscore;
m=stud[i].No ;
for(i=1;i<N;i++)
if(Max<stud[i].computerscore)
{
Max=stud[i].computerscore;
m=stud[i].No ;
}
printf("Maxcomputerscore:");
printf("Max=%d,m=%d\n",Max,m);
}
Maxenglishscore(struct student stud[])
{
int i,Max;
i=0;
Max=stud[i].Englishscore;
m=stud[i].No ;
for(i=1;i<N;i++)
if(Max<stud[i].Englishscore)
{
Max=stud[i].Englishscore;
m=stud[i].No ;
}
printf("Max Englishscore:");
printf("Max=%d,m=%d\n",Max,m);
}
MaxMathscore(struct student stud[])
{
int i=0;
int m;
int Max;
Max=stud[i].Mathscore;
m=stud[i].No ;
for(i=1;i<N;i++)
if(Max<stud[i]. Mathscore)
{
Max=stud[i].Mathscore;
m=stud[i].No ;
}
printf("MaxMathscore:");
printf("Max=%d,m=%d\n",Max,m);
}
main()
{
char ch;
int i,k,driver=DETECT,mode;
initgraph(&driver,&mode,"c:\\tc");
system("cls");
printf("\t\t*******************************************\n");
setbkcolor(BLUE);cleardevice();
setfillstyle(1,2);
setcolor(YELLOW);
rectangle(100,100,540,380);
floodfill(50,50,14);
setcolor(12);
settextstyle(1,0,8);
outtextxy(130,150,"welcome!");
printf("\t\t*******************************************\t\t\t\n");
printf("\t\t please input the number of students!\t\t\t\t");
scanf("%d",&N);
system("cls");
printf("\t\t**---------------------------------------**\n");
printf("\t\tT:input the student data .\n");
printf("\t\t\C:have a look at the data. \n");
printf("\t\tL:get every subject the highest score \n");
printf("\t\tJ:stored information \n");
printf("\t\tX:quit the program \n");
printf("\t\t**---------------------------------------**\n");
printf("please input your choise:");
while((ch=getchar())!='w')
{
switch(ch)
{
case'T':input();
break;
case'C':
chuli(stud);
break;
case'L':
Maxcomputerscore(stud);
Maxenglishscore(stud);
MaxMathscore(stud);
break;
case'X':exit(o);
case'J':
fp=fopen("student.txt","w+");/*創建一個sutden.txt文本文件*/
if(!fp)
{
printf("cannot open the file");
return;
}/*在文件頭寫入包含的學生信息*/
for(i=0;i<N;i++)
fprintf(fp,"%d\t%s\t%d\t%c\t%d\t%d\t%d\t%d\t%d\t\n",stud[i].No ,stud[i].name,stud[i].age,stud[i].sex,stud[i].computerscore,stud[i].Englishscore,stud[i].Mathscore);
fclose(fp);/*寫完後關閉文件*/
break;
default: printf("\nplease input the right word:\nT.C.L.J.X.\n");
}
printf("\n--------------over------------------------------\n");
}
}
⑷ 學生成績管理系統c語言代碼
頭文件:::
#ifndef H_STUDENT_HH
#define H_STUDENT_HH
#include "stdio.h"
#include "string.h"
#include "malloc.h"
#define LEN sizeof(struct message_student) /*一個結構體數組元素的長度*/
#define numsubs 5 /*學科數目*/
typedef struct message_student /*結構體定義*/
{
char number[6];
char name[20];
char sex[4];
float subject[numsubs];
float score;
float average;
int index;
}student;
extern int numstus; /*學生數目*/
extern student *pointer; /*指向結構體數組*/
extern int lens;
int menu_select(); /*函數聲明*/
int openfile(student stu[]);
int findrecord(student stud[]);
int writetotext(student stud[]);
void welcome();
void display1();
void showtable();
void sort(student stu[]);
void deleterecord(student stu[],int i);
void addrecord(student stud[]);
void display(student stud[],int n1,int n2);
void amendrecord(student stud[]);
void count(student stud[]);
void sortnum(student stud[]);
void sortnum2(student stud[]);
void sortname(student stud[]);
void sortname2(student stud[]);
void sortcount(student stud[]);
void sortcount2(student stud[]);
void statistic(student stud[]);
void display1();
#endif
#include "head.h"
int menu_select()
{
char c;
printf("\n\n");
printf(" | 1. 增加學生記錄 5.統計信息 |\n");
printf(" | 2. 查詢學生記錄 6.打開文件 |\n");
printf(" | 3. 修改學生記錄 7.保存文件 |\n");
printf(" | 4. 學生紀錄排序 8.顯示記錄 |\n");
printf(" | 0.退出系統 |\n");
printf("\n\n");
printf("請選擇(0-8):");
c=getchar();
getchar();
return (c-'0');
}
#include "head.h"
int findrecord(student stud[]) /*查找信息*/
{
char str[2];
int i,num;
if(numstus==0)
{
printf("沒有可被查找的記錄\n");
return -1;
}
else
{
printf("以何種方式查找？\n1.學號\t2.姓名\t3.名次\n");
gets(str);
if(str[0]=='1') /*按學號查找*/
{
printf("請輸入學號:");
gets(str);
for(i=0;i<=numstus;i++)
if(strcmp(str,stud[i].number)==0)
{
display(stud,i,i);
break;
}
else continue;
}
else if(str[0]=='2') /*按姓名查找*/
{
printf("請輸入姓名:");
gets(str);
for(i=0;i<=numstus;i++)
if(strcmp(str,stud[i].name)==0)
{
display(stud,i,i);
break;
}
else continue;
}
else if(str[0]=='3') /*按名次查找*/
{
printf("請輸入名次:");
scanf("%d",&num);
getchar();
for(i=0;i<=numstus;i++)
if(num==stud[i].index)
{
display(stud,i,i);
break;
}
else continue;
}
if(i>numstus)
{
printf("沒有查找所要的信息。\n");
return -1;
}
return i;
}
}
#include"head.h"
int openfile(student stu[])
{
int i=0,j;
FILE *fp;
char filename[20],str[2];
if(numstus!=0)
{
printf("已經有記錄存在，是否保存?(y/n)");
gets(str);
if(str[0]=='y'||str[0]=='Y')
writetotext(stu);
}
printf("請輸入文件名:");
gets(filename);
numstus=0;
if((fp=fopen(filename,"rb+"))==NULL)
{
printf("無法打開該文件\n");
return(-1);
}
fscanf(fp,"%d",&numstus);
fgetc(fp);
while(i<numstus)
{
fscanf(fp,"%s",stu[i].number);
fscanf(fp,"%s",stu[i].name);
fscanf(fp,"%s",stu[i].sex);
for(j=0;j<numsubs;j++)
fscanf(fp,"%f",&stu[i].subject[j]);
fscanf(fp,"%f",&stu[i].score);
fscanf(fp,"%f",&stu[i].average);
fscanf(fp,"%d",&stu[i].index);
i++;
}
fclose(fp);
printf("文件讀取成功\n");
printf("是否顯示紀錄?(y/n)");
gets(str);
if(str[0]=='y'||str[0]=='Y')
display(stu,0,numstus-1);
return(0);
}
#include "head.h"
void sort(student stud[])
{
int i,j=0;
char str[5];
student *p;
p=stud;
if(numstus==0)
{
printf("沒有可供查詢的記錄!");
}
while(1)
{
for(i=0;;i++)
{
printf(" 請輸入查詢方式:");
printf("（直接輸入回車則結束查詢操作）\n");
printf("1.按照學號\t");
printf("2.按照姓名\t");
printf("3.按照名次\n");
gets(str);
if(strlen(str)==0) break;
if(str[0]=='1')
{
printf("請輸入排序次序：\n");
printf("1.升序排列\t");
printf("2.降序排列\n");
gets(str);
if(str[0]=='1')
sortnum2(p);
else
sortnum(p);
display(stud,0,numstus-1);
}
else if(str[0]=='2')
{
printf("請輸入排序次序：\n");
printf("1.升序排列\t");
printf("2.降序排列\n");
gets(str);
if(str[0]=='1')
sortname2(p);
else
sortname(p);
display(stud,0,numstus-1);
}
else if(str[0]=='3')
{
printf("請輸入排序次序：\n");
printf("1.升序排列\t");
printf("2.降序排列\n");
gets(str);
if(str[0]=='1')
sortcount2(p);
else
sortcount(p);
display(stud,0,numstus-1);
}
else printf("請輸入1~3");
printf("是否退出排序?(y/n)");
gets(str);
if(str[0]=='y'||str[0]=='Y') break;
}
return;
}
}
void sortnum(student stud[])
{
int i,j;
student temp;
student *p;
p=stud;
for(i=0;i<numstus;i++)
for(j=0;j<numstus-i-1;j++)
{
if(strcmp(stud[j+1].number,stud[j].number)>0)
{
temp=*(p+j);
*(p+j)=*(p+j+1);
*(p+j+1)=temp;
}
}
}
void sortnum2(student stud[])
{
int i,j;
student temp;
student *p;
p=stud;
for(i=0;i<numstus;i++)
for(j=0;j<numstus-i-1;j++)
{
if(strcmp(stud[j].number,stud[j+1].number)>0)
{
temp=*(p+j);
*(p+j)=*(p+j+1);
*(p+j+1)=temp;
}
}
}
void sortname(student stud[])
{
int i,j;
student temp;
student *p;
p=stud;
for(i=0;i<numstus;i++)
for(j=0;j<numstus-i-1;j++)
{
if(strcmp(stud[j+1].name,stud[j].name)>0)
{
temp=*(p+j);
*(p+j)=*(p+j+1);
*(p+j+1)=temp;
}
}
}
void sortname2(student stud[])
{
int i,j;
student temp;
student *p;
p=stud;
for(i=0;i<numstus;i++)
for(j=0;j<numstus-i-1;j++)
{
if(strcmp(stud[j].name,stud[j+1].name)>0)
{
temp=*(p+j);
*(p+j)=*(p+j+1);
*(p+j+1)=temp;
}
}
}
void sortcount(student stud[])
{
int i,j;
student temp;
student *p;
p=stud;
for(i=0;i<numstus;i++)
for(j=0;j<numstus-i-1;j++)
{
if(stud[j+1].index>stud[j].index)
{
temp=*(p+j);
*(p+j)=*(p+j+1);
*(p+j+1)=temp;
}
}
}
void sortcount2(student stud[])
{
int i,j;
student temp;
student *p;
p=stud;
for(i=0;i<numstus;i++)
for(j=0;j<numstus-i-1;j++)
{
if(stud[j].index>stud[j+1].index)
{
temp=*(p+j);
*(p+j)=*(p+j+1);
*(p+j+1)=temp;
}
}
}
#include"head.h"
void statistic(student stud[]) /*新增功能，輸出統計信息*/
{
int i,j=0,k=0;
char c1,str[2];
float average[numsubs],sum=0;
if(numstus==0)
printf("沒有可被查找的記錄\n");
else
{
while(1)
{
printf("下面將統計考試成績\n");
printf("請選擇你要統計哪科的成績 1.A\t2.B\t3.C\t4.D\t5.E\n");
c1=getchar();
printf("\t一共有個%d記錄\n",numstus); /*總共記錄數*/
switch(c1)
{
case '1':
for(i=0;i<numstus;i++) /*循環輸入判斷*/
{
sum+=stud[i].subject[0];
if(stud[k].subject[0]>stud[i].subject[0]) k=i;
if(stud[j].subject[0]<stud[i].subject[0]) j=i;
}
average[0]=sum/numstus;
printf("\t科目A的最高分:\n"); /*最高分*/
printf("\t\t學號:%s 姓名:%s 分數:%.2f\n",stud[j].number,stud[j].name,stud[j].subject[0]);
printf("\t科目A的最低分是:\n"); /*最低分*/
printf("\t\t學號:%s 姓名:%s 分數:%.2f\n",stud[k].number,stud[k].name,stud[k].subject[0]);
printf("\t科目A的平均分是 %5.2f\n",average[0]); /*平均分*/
break;
case '2':
for(i=0;i<numstus;i++) /*循環輸入判斷*/
{
sum+=stud[i].subject[1];
if(stud[k].subject[1]>stud[i].subject[1]) k=i;
if(stud[j].subject[1]<stud[i].subject[1]) j=i;
}
average[1]=sum/numstus;
printf("\t科目B的最高分:\n"); /*最高分*/
printf("\t\t學號:%s 姓名:%s 分數:%.2f\n",stud[j].number,stud[j].name,stud[j].subject[1]);
printf("\t科目B的最低分是:\n"); /*最低分*/
printf("\t\t學號:%s 姓名:%s 分數:%.2f\n",stud[k].number,stud[k].name,stud[k].subject[1]);
printf("\t科目B的平均分是 %5.2f\n",average[1]); /*平均分*/
break;
case '3':
for(i=0;i<numstus;i++) /*循環輸入判斷*/
{
sum+=stud[i].subject[2];
if(stud[k].subject[2]>stud[i].subject[2]) k=i;
if(stud[j].subject[2]<stud[i].subject[2]) j=i;
}
average[2]=sum/numstus;
printf("\t科目C的最高分:\n"); /*最高分*/
printf("\t\t學號:%s 姓名:%s 分數:%.2f\n",stud[j].number,stud[j].name,stud[j].subject[2]);
printf("\t科目C的最低分是:\n"); /*最低分*/
printf("\t\t學號:%s 姓名:%s 分數:%.2f\n",stud[k].number,stud[k].name,stud[k].subject[2]);
printf("\t科目C的平均分是 %5.2f\n",average[2]); /*平均分*/
break;
case '4':
for(i=0;i<numstus;i++) /*循環輸入判斷*/
{
sum+=stud[i].subject[3];
if(stud[k].subject[3]>stud[i].subject[3]) k=i;
if(stud[j].subject[3]<stud[i].subject[3]) j=i;
}
average[3]=sum/numstus;
printf("\t科目D的最高分:\n"); /*最高分*/
printf("\t\t學號:%s 姓名:%s 分數:%.2f\n",stud[j].number,stud[j].name,stud[j].subject[3]);
printf("\t科目D的最低分是:\n"); /*最低分*/
printf("\t\t學號:%s 姓名:%s 分數:%.2f\n",stud[k].number,stud[k].name,stud[k].subject[3]);
printf("\t科目D的平均分是 %5.2f\n",average[3]); /*平均分*/
break;
case '5':
for(i=0;i<numstus;i++) /*循環輸入判斷*/
{
sum+=stud[i].subject[4];
if(stud[k].subject[4]>stud[i].subject[4]) k=i;
if(stud[j].subject[4]<stud[i].subject[4]) j=i;
}
average[4]=sum/numstus;
printf("\t科目E的最高分:\n"); /*最高分*/
printf("\t\t學號:%s 姓名:%s 分數:%.2f\n",stud[j].number,stud[j].name,stud[j].subject[4]);
printf("\t科目E的最低分是:\n"); /*最低分*/
printf("\t\t學號:%s 姓名:%s 分數:%.2f\n",stud[k].number,stud[k].name,stud[k].subject[4]);
printf("\t科目E的平均分是 %5.2f\n",average[4]); /*平均分*/
break;
default:printf("輸入錯誤！請輸入1~5之間的數\n");
}
sum=0;
getchar();
printf("是否繼續進行統計?(y/n)");
gets(str);
if(str[0]=='y'||str[0]=='Y') ;
else break;
}
}
}
#include"head.h"
int writetotext(student stud[]) /*將所有記錄寫入文件*/
{
int i=0,j;
FILE *fp;
char filename[20];
printf("輸入文件名稱:");
gets(filename);
fp=fopen(filename,"w");
fprintf(fp,"%d\n",numstus);
while(i<numstus)
{
fprintf(fp,"%s %s %s ",stud[i].number,stud[i].name,stud[i].sex);
for(j=0;j<numsubs;j++)
fprintf(fp,"%f ",stud[i].subject[j]);
fprintf(fp,"%f %f %d ",stud[i].score,stud[i].average,stud[i].index);
i++;
}
fclose(fp);
printf("已成功存儲!\n");
display(stud,0,numstus-1);
numstus=0;
return 0;
}
#include"head.h"
void welcome()
{
printf("\t*************************************************************\n");
printf("\t\t\t\t這是一個學生成績管理系統\n\t\t\t\t 傾情奉獻 歡迎使用!\n");
printf("\t*************************************************************\n");
}
void showtable()
{
printf("---------------------------------------------------------------------------------------\n");
printf("學號\t姓名\t性別\tA\tB\tC\tD\tE\t總分\t平均分\t名次\n");
printf("---------------------------------------------------------------------------------------\n");
}
void display(student stud[],int n1,int n2)
{
int i;
showtable(); /*顯示表頭*/
for(i=n1;i<=n2;i++)
printf("%s\t%s\t%s\t%.2f\t%.2f\t%.2f\t%.2f\t%.2f\t%.2f\t%.2f\t%d\t\n",stud[i].number,stud[i].name,stud[i].sex,stud[i].subject[0],stud[i].subject[1],stud[i].subject[2],stud[i].subject[3],stud[i].subject[4],stud[i].score,stud[i].average,stud[i].index);
/*通過循環輸出數據*/
}
void display1()
{
printf("\t\t本系統由計應精英一組親情製作\n\n");
printf("\t\t製作人員列表: (按比劃)\n");
printf("\t\t王慶斌\t\t\t張威\n\t\t李智\t\t\t周在峰\n\t\t楊凱\t\t\t胡楊\n");
printf("\n\n");
getchar();
}
#include"head.h"
#include
void amendrecord(student stud[])
{
char str[5]; /*供用戶輸入*/
int i=-1,j;
if(numstus==0) /*沒有記錄返回*/
printf("沒有可供修改的記錄！");
while(i<0)
{
i=findrecord(stud);
if(i>=0)
{
printf("要刪除這個學生的信息嗎?(y/n)");
gets(str);
if(str[0]=='y'||str[0]=='Y')
{
deleterecord(stud,i);
count(stud);
}
else
{
printf("確定要修改這個學生的信息嗎?(y/n)");
gets(str);
if(str[0]=='y'||str[0]=='Y')
{
printf("下面請重新輸入學生的信息:\n");
printf("請輸入學號:");
gets(stud[i].number);
printf("請輸入姓名:");
gets(stud[i].name);
printf("請輸入性別(男/女 1/0):");
gets(str);
if(str[0]=='0')
strcpy(stud[i].sex,"女");
else
strcpy(stud[i].sex,"男");
stud[i].score=0;
printf("請按順序輸入成績:");
for(j=0;j<numsubs;j++)
{
scanf("%f",&stud[i].subject[j]);
stud[i].score+=stud[i].subject[j];
}
getchar();
stud[i].average=stud[i].score/numsubs;
}
count(stud);
}
display(stud,0,numstus-1);
}
printf("是否繼續進行其他修改?(y/n)\n");
gets(str);
if(str[0]=='y'||str[0]=='Y')
i=-1;
else i=1;
}
}
void deleterecord(student stu[],int i) /*刪除信息*/
{
int j;
while(i>=0)
{
for(j=i;j<numstus;j++)
stu[j]=stu[j+1];
numstus--;
printf("刪除成功!\n");
}
}
void count(student stud[])
{
int i,j;
for(i=0;i<numstus;i++)
{
stud[i].index=1;
for(j=0;j<numstus;j++)
if(stud[j].score>stud[i].score)
stud[i].index++;
}
}
#include "head.h"
void addrecord(student stud[])
{
int i=0,j,num;
char str[5];
if(numstus!=0)
{
printf("已有記錄存在是否覆蓋?(y/n)\n");
gets(str);
if(str[0]=='Y'||str[0]=='y')
i=0;
else i=numstus;
}
printf("請輸入增加的學生信息條目數:");
scanf("%d",&num);
if(i==0)
numstus=num;
else numstus+=num;
if(numstus>lens)
{
lens+=50;
pointer=(student *)realloc(pointer,lens*LEN);
}
printf("請輸入學生信息:\n");
for(;i<numstus;i++)
{
getchar();
printf("請輸入學號:");
gets(pointer[i].number);
printf("請輸入姓名:");
gets(pointer[i].name);
printf("請輸入性別(男/女 1/0):");
gets(pointer[i].sex);
if(pointer[i].sex[0]=='0') strcpy(pointer[i].sex,"女");
else strcpy(pointer[i].sex,"男");
printf("請輸入各科成績:(按ABCDE的順序):");
stud[i].score=0;
for(j=0;j<numsubs;j++)
{
scanf("%f",&stud[i].subject[j]); /*計算總分*/
stud[i].score+=stud[i].subject[j];
}
stud[i].average=stud[i].score/numsubs; /*計算平均分*/
}
count(stud); /*附名次*/
display(stud,0,numstus-1);
getchar();
}#include "head.h"
int numstus;
int lens;
student *pointer;
void main()
{
int i=1;
char str[2];
lens=100;
pointer=(student *)malloc(lens*LEN); /*分配內存*/
numstus=0;
welcome(); /*歡迎界面*/
while(i>0)
{
i=menu_select(); /*控制菜單*/
switch(i)
{
case 1:addrecord(pointer);break; /*增加學生信息*/
case 2:findrecord(pointer);break; /*查詢學生信息*/
case 3:amendrecord(pointer);break; /*修改學生信息*/
case 4:sort(pointer);break; /*學生信息排序*/
case 5:statistic(pointer);break; /*統計信息*/
case 6:openfile(pointer);break; /*打開文件*/
case 7:writetotext(pointer);break; /*保存文件*/
case 8:display(pointer,0,numstus-1);break; /*顯示記錄*/
case 0:
if(numstus!=0) printf("是否保存當前記錄?(y/n)");
gets(str);
if(str[0]=='y'||str[0]=='Y')
writetotext(pointer);
i=-1;break; /*退出系統*/
default:printf("請輸入數字0~8:\n");i=1; /*輸入錯誤*/
}
}
printf("\t\t歡迎再次使用本系統。\n\n");
display1();
}
自己一改就能用,給我加分哈!
⑸ c語言學生成績統計系統
#include<stdio.h>
#include<string.h>
#define NUM1 3
#define NUM2 3
#define NUM3 3
struct student
{
char name[10];
int score;
}c1[NUM1],c2[NUM2],c3[NUM3];//定義三個結構體數組
int i,j,k;
FILE *fp1_order,*fp2_order,*fp3_order;/*/定義文件指針
/*/=========================================================
void main(void)
{
void data_in(void);
void score_order(void);
void save_in(void);
void save_order(void);
void open_order(void);
printf("******************************學生成績文件管理******************************\n");
printf(" programmer:喻翔\n\n");
printf("一、輸入三個班的學生姓名和成績：\n\n");
data_in();
printf("\n\n\n");
printf("############################################################################\n\n");
printf("二、保存輸入的姓名和成績：\n\n");
save_in();
printf("\n\n\n\n");
printf("############################################################################\n\n");
printf("三、排名並保存姓名和成績：\n\n");
score_order();
save_order();
printf("\n\n\n\n");
printf("############################################################################\n\n");
printf("四、驗證排名後保存的文件：\n\n");
open_order();
printf("\n\n\n");
}
//=============================================================
void data_in(void)
{
printf("請輸入一班%d個學生的姓名和成績：\n",NUM1);
for(i=0;i<NUM1;i++)
{
printf("第%d個：",i+1);
scanf("%s %d",c1[i].name,&c1[i].score);
}
printf("\n\n\n請輸入二班%d個學生的姓名和成績：\n",NUM2);
for(j=0;j<NUM2;j++)
{
printf("第%d個：",j+1);
scanf("%s %d",c2[j].name,&c2[j].score);
}
printf("\n\n\n請輸入三班%d個學生的姓名和成績：\n",NUM3);
for(k=0;k<NUM3;k++)
{
printf("第%d個：",k+1);
scanf("%s %d",c3[k].name,&c3[k].score);
}
}
//=============================================================
void score_order(void)
{
int h,t;
char s[10];
for(h=0;h<NUM1-1;h++)
for(i=0;i<NUM1-1-h;i++)
if(c1[i].score<c1[i+1].score)
{
t=c1[i].score;
c1[i].score=c1[i+1].score;
c1[i+1].score=t;
strcpy(s,c1[i].name);//一定要使用strcpy（）函數
strcpy(c1[i].name,c1[i+1].name);
strcpy(c1[i+1].name,s);
}
for(h=0;h<NUM2-1;h++)
for(j=0;j<NUM2-1-h;j++)
if(c2[j].score<c2[j+1].score)
{
t=c2[j].score;
c2[j].score=c2[j+1].score;
c2[j+1].score=t;
strcpy(s,c2[j].name);
strcpy(c2[j].name,c2[j+1].name);
strcpy(c2[j+1].name,s);
}
for(h=0;h<NUM3-1;h++)
for(k=0;k<NUM3-1-h;k++)
if(c3[k].score<c3[k+1].score)
{
t=c3[k].score;
c3[k].score=c3[k+1].score;
c3[k+1].score=t;
strcpy(s,c3[k].name);
strcpy(c3[k].name,c3[k+1].name);
strcpy(c3[k+1].name,s);
}
}
//=====================================================================
void save_in(void)
{
FILE *fp1_in,*fp2_in,*fp3_in;
if((fp1_in=fopen("data1_in.dat","wb"))==NULL)
{
printf("The file can not open!\n");
return;
}
for(i=0;i<NUM1;i++)
if(fwrite(&c1[i],sizeof(struct student),1,fp1_in)!=1)
{
printf("file write error!\n");
return;
}
fclose(fp1_in);
if((fp2_in=fopen("data2_in.dat","wb"))==NULL)
{
printf("The file can not open!\n");
return;
}
for(j=0;j<NUM2;j++)
if(fwrite(&c2[j],sizeof(struct student),1,fp2_in)!=1)
{
printf("file write error!\n");
return;
}
fclose(fp2_in);
if((fp3_in=fopen("data3_in.dat","wb"))==NULL)
{
printf("The file can not open!\n");
return;
}
for(k=0;k<NUM3;k++)
if(fwrite(&c3[k],sizeof(struct student),1,fp3_in)!=1)
{
printf("file write error!\n");
return;
}
fclose(fp3_in);
}
//==============================================================
void save_order(void)
{
if((fp1_order=fopen("data1_order.dat","wb"))==NULL)
{
printf("The file can not open!\n");
return;
}
for(i=0;i<NUM1;i++)
if(fwrite(&c1[i],sizeof(struct student),1,fp1_order)!=1)
{
printf("file write error!\n");
return;
}
fclose(fp1_order);
if((fp2_order=fopen("data2_order.dat","wb"))==NULL)
{
printf("The file can not open!\n");
return;
}
for(j=0;j<NUM2;j++)
if(fwrite(&c2[j],sizeof(struct student),1,fp2_order)!=1)
{
printf("file write error!\n");
return;
}
fclose(fp2_order);
if((fp3_order=fopen("data3_order.dat","wb"))==NULL)
{
printf("The file can not open!\n");
return;
}
for(k=0;k<NUM3;k++)
if(fwrite(&c3[k],sizeof(struct student),1,fp3_order)!=1)
{
printf("file write error!\n");
return;
}
fclose(fp3_order);
}
//=============================================================
void open_order(void)
{
fp1_order=fopen("data1_order.dat","rb");
printf("一班的成績排名如下：\n");
printf("名次 姓名 C語言成績\n");
printf("----------------------------------------\n");
for(i=0;i<NUM1;i++)
{
printf("第%d名 ",i+1);
fread(&c1[i],sizeof(struct student),1,fp1_order);
printf("%s %d\n",c1[i].name,c1[i].score);
}
fp2_order=fopen("data2_order.dat","rb");
printf("\n\n\n二班的成績排名如下：\n");
printf("名次 姓名 C語言成績\n");
printf("----------------------------------------\n");
for(j=0;j<NUM2;j++)
{
printf("第%d名 ",j+1);
fread(&c2[j],sizeof(struct student),1,fp2_order);
printf("%s %d\n",c2[j].name,c2[j].score);
}
fp3_order=fopen("data3_order.dat","rb");
printf("\n\n\n三班的成績排名如下：\n");
printf("名次 姓名 C語言成績\n");
printf("----------------------------------------\n");
for(k=0;k<NUM3;k++)
{
printf("第%d名 ",k+1);
fread(&c3[k],sizeof(struct student),1,fp3_order);
printf("%s %d\n",c3[k].name,c3[k].score);
}
}
⑹ C語言成績管理系統
#include"stdio.h"
structstu{
intsid,score;
charg;
};
voidscorein(structstu*p,intn){
inti,t;
for(i=0;i<n;i++){
scanf("%d%d",&p[i].sid,&p[i].score);
p[i].g=(t=p[i].score)>89&&t<101?'A':t>79&&t<90?'B':t>69&&t<80?'C':t>59&&t<70?'D':'E';
}
}
intsum(structstu*p,intn){
ints=0;
while(n--)
s+=p++->score;
returns;
}
voiddssort(structstu*p,intn){
inti,j,k;
structstut;
printf(" STUID SCORE CLASS ===================== ");
for(i=0;i<n;i++){
for(k=i,j=k+1;j<n;j++)
if(p[k].score<p[j].score)
k=j;
if(k!=i)
t=p[k],p[k]=p[i],p[i]=t;
printf("%d %d %c ",p[i].sid,p[i].score,p[i].g);
}
}
voididsort(structstu*p,intn){
inti,j,k;
structstut;
printf(" STUID SCORE CLASS ===================== ");
for(i=0;i<n;i++){
for(k=i,j=k+1;j<n;j++)
if(p[k].sid>p[j].sid)
k=j;
if(k!=i)
t=p[k],p[k]=p[i],p[i]=t;
printf("%d %d %c ",p[i].sid,p[i].score,p[i].g);
}
}
voidquery(structstu*p,intn){
intid;
printf(" PleaseenterID(int)... ");
scanf("%d",&id);
while(id-p->sid&&n)
p++,n--;
if(n>=0){
printf("STUID SCORE CLASS ===================== ");
printf("%d %d %c ",p->sid,p->score,p->g);
}
else
printf("Nofind! ");
}
voidlevel(structstu*p,intn){
intd[5],i;
chars[5][7]={"優秀","良好","中等","及格","不及格"};
printf("統計信息如下: ");
for(i=0;i<5;d[i++]=0);
for(i=0;i<n;i++,d[p++->g-'A']++);
for(i=0;i<5;i++)
printf("%6s: %d %.2f%% ",s[i],d[i],d[i]/(n+0.0)*100);
}
voidoutinfo(structstu*p,intn){
inti;
printf(" STUID SCORE ============= ");
for(i=0;i<n;i++)
printf("%d %d ",p[i].sid,p[i].score);
}
intmain(intargc,char*argv[]){
intn,s;
structstua[30];
printf("Pleaseentern(int0<n<31)... ");
if(scanf("%d",&n)!=1||n<1||n>30){
printf("Inputerror,exit... ");
return0;
}
scorein(a,n);//輸入
dssort(a,n);//分數降序
idsort(a,n);//學號升序
query(a,n);//查詢
level(a,n);//等級和百分比
outinfo(a,n);//輸出各位學生信息
printf("總分:%d",s=sum(a,n));
printf("平均分:%.2f ",s/(n+0.0));
return0;
}
運行樣例：
⑺ 用C語言設計一個學生成績統計系統
// Note:Your choice is C++ IDE
#include <iostream>
#include <string>
using namespace std;
//N代表科目數，M代表人數
#define N 2
#define M 3
class student
{public:
float score[N];
string name;
float average;
float total;
int rank;
student();
void inscore();
void calav();
void caltt();
void show();
};
void student::inscore()
{
int i;
cout<<"輸入姓名：";
cin>>name;
cout<<"輸入成績：";
for(i=0;i<N;i++)
{
cin>>score[i];
}
caltt();
calav();
}
void student::calav()
{
average=total/N;
}
void student::caltt()
{
int i;
for(i=0;i<N;i++)
total+=score[i];
}
void student::show()
{
int i;
cout<<rank<<" "<<name<<" ";
for(i=0;i<N;i++)
cout<<score[i]<<" ";
cout<<endl;
}
void setrank(student sys[M])
{
int i,j;
student tmp=sys[0];
for(i=0;i<M-1;i++)
{
for(j=i+1;j<M;j++)
if(sys[j].average>sys[i].average)
{
tmp=sys[j];
sys[j]=sys[i];
sys[i]=tmp;
}
sys[i].rank=i+1;
}
sys[i].rank=i+1;
}
void findsc(student sys[M])
{
string n;
int i;
cout<<"請輸入查詢的名字:";
cin>>n;
cout<<"排名 "<<"姓名 "<<"--成績--"<<endl;
for(i=0;i<M;i++)
if(sys[i].name==n)
{
sys[i].show();
}
}
void findrank(student sys[M])
{
string n;
int i;
cout<<"請輸入查詢的名字:";
cin>>n;
for(i=0;i<M;i++)
if(sys[i].name==n) cout<<sys[i].rank;
}
void find10(student sys[M])
{
int j;
cout<<"排名 "<<"姓名 "<<"--成績--"<<endl;
for(j=0;j<10;j++)
sys[j].show();
}
void findgrade(student sys[M])
{
int i,j;
cout<<"1.>=85 2.>=75 3.>=60 4.<60"<<endl;
cin>>i;
switch(i)
{
case 1:
{
cout<<"排名 "<<"姓名 "<<"--成績--"<<endl;
for(j=0;j<M;j++)
sys[j].show();
}
break;
case 2:
{
cout<<"排名 "<<"姓名 "<<"--成績--"<<endl;
for(j=0;j<M;j++)
if(sys[j].average>=75 && sys[j].average<85) sys[j].show();
}
break;
case 3:
{
cout<<"排名 "<<"姓名 "<<"--成績--"<<endl;
for(j=0;j<M;j++)
sys[j].show();
}
break;
case 4:
{
cout<<"排名 "<<"姓名 "<<"--成績--"<<endl;
for(j=0;j<M;j++)
if(sys[j].average<60) sys[j].show();
}
break;
}
}
void findbad(student sys[M])
{
int i,j,k;
for(i=0;i<M;i++)
{
k=0;
cout<<"排名 "<<"姓名 "<<"--成績--"<<endl;
for(j=0;j<N;j++)
{
if(sys[i].score[j]<60) k++;
if(k==3)
}
}
}
void pub(student sys[M])
{
int i;
cout<<"排名 "<<"姓名 "<<"--成績--"<<endl;
for(i=0;i<M;i++)
sys[i].show();
}
int main()
{
student st[M];
int i,j;
while(1)
{
cout<<
"-------------------------------\n"<<
"1.輸入成績\n"<<
"2.查詢任一學生成績\n"<<
"3.查詢任一學生排名\n"<<
"4.查詢前十的學生\n"<<
"5.查詢成績級別的情況\n"<<
"6.查詢三門不及格的學生\n"<<
"7.按成績高低，順序輸入所有學生\n"<<
"-------------------------------"<<endl;
cin>>i;
switch(i)
{
case 1:
for(j=0;j<M;j++)
{
cout<<"輸入第"<<j+1<<"個學生的成績"<<endl;
st[j].inscore();
};
setrank(st);
break;
case 2:findsc(st);system("pause");break;
case 3:findrank(st);system("pause");break;
case 4:find10(st);system("pause");break;
case 5:findgrade(st);system("pause");break;
case 6:findbad(st);system("pause");break;
case 7:pub(st);system("pause");break;
}
}
return 0;
}
⑻ 學生成績管理系統C語言代碼
#include"stdio.h"
#include<string.h>
#include<stdlib.h>
#define N 30
struct student
{
int num;
char name[20];
int age;
int Math;
int English;
int Physical;
long int sum;
}stu[N];
enter()
{int i,n;
printf("How many students(1-%d)?:",N);
scanf("%d",&n);
printf("\nEnter data now\n\n");
for(i=0;i<n;i++)
{printf("\n Input %dth student record.\n",i+1);
input(i);
}
if(i!=0) save(n);
printf_back(); /* browse or back */
}
add()
{int i,n,m,k;
FILE *fp;
n=load();
printf("How many students are you want to add(1-%d)?:",N-n);
scanf("%d",&m);
k=m+n;
for(i=n;i<k;i++)
{printf("\n Input %dth student record.\n",i+1);
input(i);
}
if((fp=fopen("score.txt","ab"))==NULL)
{printf("Cannot open file.\n");
}
for(i=n;i<k;i++)
if(fwrite(&stu[i],sizeof(struct student),1,fp)!=1)
printf("file write error.\n");
fclose(fp);
printf_back();
}
/* insert()
{int n,c;
struct student s;
n=load();
puts("\n Input one data.\n");
do
{input(n);
printf_face();
printf_one(n);
printf("\n\nAre you sure?\n\n\t 1.Sure\t2.cancel and again\t3.Back without save [ ]\b\b");
scanf("%d",&c);
if(c==1)
{
save(n+1);
printf_back();
}
else if(c!=2) menu();
}
while(c==2);
} */
modify()
{struct student s;
FILE *fp;
int i,n,k,w0=1,w1,w2=0;
n=load();
do
{
k=-1;
printf_face();
for(i=0;i<n;i++)
{if((i!=0)&&(i%10==0))
{printf("\n\nRemember NO.031073- which needed modify.Pass any key to continue ...");
getch();
puts("\n\n");
}
printf_one(i);
printf("\n");
}
do
{printf("\n\nEnter NO.031073- that you want to modify! NO.:031073-");
scanf("%d",&s.num);
for(i=0;i<n;i++)
if(s.num==stu[i].num)
{k=i;
s=stu[i]; /* chengji beifei */
}
if(k==-1) printf("\n\nNO exist!please again");
}
while(k==-1);
printf_face();
printf_one(k);
w1=modify_data(k,n);
if(w1==1)
{printf("\nSuccessful ^_^.\n\nAre you modify another?\n\n\t1.Yes2.Back with save\t[ ]\b\b");
scanf("%d",&w0);
w2=1;
}
else
{w0=0; /* end */
if(w2==1)
stu[k]=s;
}
if(w0!=1&&w2==1) save(n); /* w0!=1 return w2==1 modify */
}
while(w0==1);
menu();
}
delete()
{struct student s;
FILE *fp;
int i,n,k,w0=1,w1,w2=0;
n=load();
do
{
k=-1;
printf_face();
for(i=0;i<n;i++)
{if((i!=0)&&(i%10==0))
{printf("\n\nRemember NO.031073- which needed delete.Pass any key to continue ...");
getch();
puts("\n\n");
}
printf_one(i);
printf("\n");
}
do
{printf("\n\nEnter NO.031073- that you want to delete! NO.:031073-");
scanf("%d",&s.num);
for(i=0;i<n;i++)
if(s.num==stu[i].num)
{k=i;
s=stu[i]; /* chengji beifei */
}
if(k==-1) printf("\n\nNO exist!please again");
}
while(k==-1);
printf_face();
printf_one(k);
printf("\nAre you sure?\n\n\t1.Sure2.Back without save in this time [ ]\b\b");
scanf("%d",&w1);
if(w1==1)
{
stu[k].sum=0;
printf("\nSuccessful ^_^.\n\nAre you delete another?\n\n\t1.Yes2.Back with save\t[ ]\b\b");
scanf("%d",&w0);
w2=1;
}
else
{w0=0; /* end */
if(w2==1)
stu[k]=s;
}
if(w0!=1&&w2==1) save(n);
}
while(w0==1);
menu();
}
modify_score()
{struct student s;
FILE *fp;
int i,n,k,w0=1,w1,w2=0;
n=load();
do
{
k=-1;
printf_face();
for(i=0;i<n;i++)
{if((i!=0)&&(i%10==0))
{printf("\n\nRemember NO.031073 which score needed modify.Pass any key to continue ...");
getch();
puts("\n\n");
}
printf_one(i);
printf("\n");
}
do
{printf("\n\nEnter NO.031073- that you want to modify! NO.:031073-");
scanf("%d",&s.num);
for(i=0;i<n;i++)
if(s.num==stu[i].num)
{k=i;
s=stu[i]; /* chengji beifei */
}
if(k==-1) printf("\n\nNO exist!please again");
}
while(k==-1);
printf_face();
printf_one(k);
w1=modify_score1(k);
if(w1==1)
{printf("\nSuccessful ^_^.\n\nAre you modify another score?\n\n\t1.Yes2.Back with save\t[ ]\b\b");
scanf("%d",&w0);
w2=1;
}
else
{w0=0; /* end */
if(w2==1)
stu[k]=s;
}
if(w0!=1&&w2==1) save(n); /* w0!=1 return w2==1 modify */
}
while(w0==1);
menu();
}
order()
{int i,j,k,n;
struct student s;
n=load();
for(i=0;i<n-1;i++)
{k=i;
for(j=i+1;j<n;j++)
if(stu[j].num<stu[k].num) k=j;
s=stu[i];stu[i]=stu[k];stu[k]=s;
}
save(n);
puts("\n\n");
printf_back();
}
browse()
{int i,j,n;
n=load();
printf_face();
for(i=0;i<n;i++)
{if((i!=0)&&(i%10==0))
{printf("\n\nPass any key to contiune ...");
getch();
puts("\n\n");
}
printf_one(i);
printf("\n");
}
printf("\tThere are %d record.\n",n);
printf("\nPass any key to back...");
getch();
menu();
}
save(int n)
{FILE *fp;
int i;
if((fp=fopen("score.txt","wb"))==NULL)
{printf("\nCannot open file\n");
return NULL;
}
for(i=0;i<n;i++)
if(stu[i].sum!=0)
if(fwrite(&stu[i],sizeof(struct student),1,fp)!=1)
printf("file write error\n");
fclose(fp);
}
load()
{FILE *fp;
int i;
if((fp=fopen("score.txt","rb"))==NULL)
{printf("\nCannot open file\n");
return NULL;
}
for(i=0;!feof(fp);i++)
fread(&stu[i],sizeof(struct student),1,fp);
fclose(fp);
return(i-1);
}
no_input(int i,int n)
{int k,w1;
do
{w1=0;
printf("NO.:031073-");
scanf("%d",&stu[i].num);
if(stu[i].num<1 || stu[i].num>N)
{puts("Input error! Only be made up of(1-N).Please reinput!\n");
w1=1;
}
if(w1!=1)
for(k=0;k<n;k++)
if(k!=i&&(stu[k].num==stu[i].num))
{puts("This record is exist. Please reinput!\n");
w1=1;break;
}
}
while(w1==1);
}
enter_score(int i)
{printf("Math English Physical");
scanf("%d %d %d",&stu[i].Math,&stu[i].English,&stu[i].Physical);
}
sum(int i)
{
stu[i].sum=stu[i].Math+stu[i].English+stu[i].Physical;
}
input(int i)
{no_input(i,i);
printf("name: age:");
scanf("%s %d",stu[i].name,&stu[i].age);
enter_score(i);
sum(i);
}
modify_score1(int i)
{int c,w1;
do
{
puts("\nmodify by=>\n\n 1.Math 2.English 3.Physical4.all score 5.cancel and back");
printf("Which you needed?:[ ]\b\b");
scanf("%d",&c);
if(c>5||c<1)
{puts("\nChoice error! Please again!");
getchar();
}
}
while(c>5||c<1);
do
{switch(c)
{
case 1:printf("Math:");scanf("%d",&stu[i].Math);break;
case 2:printf("English:");scanf("%d",&stu[i].English);break;
case 3:printf("Physical:");scanf("%d",&stu[i].Physical);break;
case 4:enter_score(i);break;
case 5:break;
}
if(c>0&&c<5) sum(i);
puts("\nNow:\n");
printf_face();
printf_one(i);
printf("\nAre you sure?\n\n\t1.Sure 2.No and remodify3.Back without save in this time [ ]\b\b");
scanf("%d",&w1);
}
while(w1==2);
return(w1);
}
modify_data(int i,int n)
{int c,w1;
do
{
puts("\nmodify by=>\n\n 1.NO. 2.name 3.age 4.Math 5.English 6.Physical7.all score 8.all data 9.cancel and back");
printf("Which you needed?:[ ]\b\b");
scanf("%d",&c);
if(c>9||c<1)
{puts("\nChoice error! Please again!");
getchar();
}
}
while(c>9||c<1);
do
{switch(c)
{case 1:no_input(i,n);break;
case 2:printf("name:");scanf("%s",stu[i].name);break;
case 3:printf("age:");scanf("%d",&stu[i].age);break;
case 4:printf("Math:");scanf("%d",&stu[i].Math);break;
case 5:printf("English:");scanf("%d",&stu[i].English);break;
case 6:printf("Physical:");scanf("%d",&stu[i].Physical);break;
case 7:enter_score(i);break;
case 8:input(i);break;
case 9:break;
}
if(c>3&&c<8) sum(i);
puts("\nNow:\n");
printf_face();
printf_one(i);
printf("\nAre you sure?\n\n\t1.Sure 2.No and remodify3.Back without save in this time [ ]\b\b");
scanf("%d",&w1);
}
while(w1==2);
return(w1);
}
printf_face()
{printf("\nNO.031073 name age Math English Physical sum\n");
}
printf_one(int i)
{
printf("%6d %8s %4d",stu[i].num,stu[i].name,stu[i].age);
printf("%5d %5d %8d %10d",stu[i].Math,stu[i].English,stu[i].Physical,stu[i].sum);
}
printf_back()
{int k,w;
printf("\n\n\tSuccessful.^_^\n\n");
printf("What do you want to do?\n\n\t1.Browse all now\t2.Back:[ ]\b\b");
scanf("%d",&w);
if(w==1) browse();
else menu();
}
menu()
{int w1;
char n;
do
{
puts("\t\t****************MENU****************\n\n");
puts("\t\t\t\tA.Enter new data");
puts("\t\t\t\tB.Addition data");
puts("\t\t\t\tC.Modify data");
puts("\t\t\t\tD.Delete data");
puts("\t\t\t\tE.Modify score");
puts("\t\t\t\tF.Order by number");
puts("\t\t\t\tG.Browse all");
puts("\t\t\t\tH.Exit");
puts("\n\n\t\t************************************\n");
printf("Choice your number(A-H):[ ]\b\b");
n=getchar();
printf("\n");
if(n<'A'||n>'H')
w1=1;
else w1=0;
}
while(w1==1);
switch(n)
{case 'A':enter();break;
case 'B':add();break;
case 'C':modify();break;
case 'D':delete();break;
case 'E':modify_score();break;
case 'F':order();break;
case 'G':browse();break;
case 'H':exit(0);
}
}
char password[7]="123456";
main()
{
char s[7];
printf("\t\t請輸入密碼:\n\t\t\n\t\t");
scanf("%s",s);
if(!strcmp(s,password))
{
printf("\n\t\t恭喜你進入學生成績管理系統\n");
menu();
}
else
{
printf("\t\t 密碼錯誤\n\n");
main();
}
}
⑼ 怎樣用C語言編寫考生成績自動評估系統
/*
考生成績自動評估系統
2．試題錄入：可隨時增加試題到試題庫中
3．試題抽取：每次從試題庫中可以隨機抽出N道題（N由鍵盤輸入）
4．答題：用戶可實現輸入自己的答案
5．自動判卷：系統可根據用戶答案與標准答案的對比實現判卷並給出成績
*/
#include <conio.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#define szSTR 240
/*考題資料庫，以鏈表表示*/
struct Question {
char title[szSTR]; /*題目*/
char answer;/*正確答案*/
char mark; /*防止重復出題的標志位*/
struct Question * next;
} * questions = 0;
/*將題庫結構體縮寫為Q*/
typedef struct Question Q;
/*錄入新題*/
void add(void)
{
/*為新題分配內存*/
Q * q = (Q*)malloc(sizeof(Q));
memset(q, 0, sizeof(Q));
printf("請輸入新增考題內容，按回車結束：");
fflush(stdin);
gets(q->title );
printf("請輸入正確答案：");
fflush(stdin);
q->answer = getch();
printf("\n新題目內容為：%s\n正確答案是：%C。\n",
q->title , q->answer );
q->next = questions;
questions = q;
}/*end add*/
/*統計當前題錄信息，如果f存在，則列印到f中去*/
int count(FILE * f)
{
int t = 0; Q * q = questions;
while(q) {
t++;
if(f)fprintf(f, "【第%d題】%s【正確答案%C】\n", t, q->title, q->answer);
q=q->next;
}/*end while*/
return t;
}/*end count*/
/*列印當前題庫*/
void list(void)
{
printf("當前題庫：\n--------------------------\n");
count(stdout);
printf("\n--------------------------\n");
}/*end list*/
/*按照id流水題號獲取題目信息*/
Q * get(int id)
{
int t = 0; Q * q = questions;
while(q) {
t++; q = q->next ;
if(t == id) return q;
}/*end while*/
return 0;
}/*end get*/
/*刪除一道考題*/
void del(void)
{
Q * q = 0 , * p = 0; int y = 0, s = 0, t = 0, c = 0;
c = count(0);
if (c < 1) {
printf("題庫為空！\n");
return ;
}/*end if*/
printf("請輸入要刪除的題目編號（目前題庫中共有%d道題）：", c);
scanf("%d", &t);
if(t < 1 || t > c) {
printf("查無此題！");
return ;
}/*end if*/
printf("確認刪除嗎(y/n)？");
y = getch();
if(y!='y' && y!='Y') return ;
if(t == 1) {
questions = q->next ;
free(q);
printf("操作成功\n");
return ;
}/*end if*/
q = questions;
for(s = 1; s < t-1; s++) q = q->next ;
p = q->next ;
q->next = p->next ;
free(p);
printf("操作成功\n");
}/*end del*/
/*進行考試*/
void exam(void)
{
int n = 0, good = 0, c = 0, i = 0, j = 0; char a = 0;
Q * q = questions;
if(!q) {
printf("題庫為空，無法進行考試！\n");
return ;
}/*end if*/
c = count(0);
printf("請輸入用於考試的出題數量N（N = [1 ~ %d]）", c);
scanf("%d", &n);
if(n < 1 || n > c) {
printf("輸入的n不是個有效的題目數量");
return ;
}/*end if*/
/*首先將題庫內標志清空，防止重復出題*/
while(q) { q->mark = 0; q=q->next ;}
for(i = 0; i < n; i++) {
do {
j = rand() * c / RAND_MAX + 1; printf("%d ", j);
q = get(j);
if (!q) continue;
}while (q->mark );
q->mark = 1;
printf("【第%d題】%s\n請選擇：", i+1, q->title );
fflush(stdin);
scanf("%c", &a);
if(a == q->answer ) good ++;
}/*next*/
printf("考試結束。您的成績為%d\n", good * 100 / n);
}/*end exam*/
int main(void)
{
int cmd = 0;
/*初始化隨機數種子，用於隨機出題*/
srand(time(0));
for(;;) {
printf("\n\t歡迎使用題庫系統。請選擇：\n\t1-查看題庫；\n\t2-新增題目；\n\t3-刪除題目；\n\t4-開始考試；\n\t0-退出系統。\n");
fflush(stdin);
cmd = getch() - '0';
switch (cmd) {
case 0: return 0;
case 1: list(); break;
case 2: add(); break;
case 3: del(); break;
case 4: exam(); break;
}/*end case*/
}/*end main*/
return 0;
}
⑽ 學生成績管理系統，使用c語言程序編寫。
給一個我以前寫過的吧，功能應該差不多
#include<algorithm>
#include<iostream>
#include<cstring>
#include<cstdio>
#include<string>
#include<vector>
#include<queue>
#include<stack>
#include<cmath>
usingnamespacestd;
/*定義學生結構體*/
structStudent
{
charID[20];
charName[20];
floatMark1;
floatMark2;
floatMark3;
floatAverage;
};
/*聲明學生數組及學生數量*/
structStudentstudents[1000];
intnum=0;/*求平均值*/
floatAvg(structStudentstu)
{
return(stu.Mark1+stu.Mark2+stu.Mark3)/3;
}/*通過學號返回數組下標*/
intStudent_SearchByIndex(charid[])
{
inti;
for(i=0;i<num;i++)
{
if(strcmp(students[i].ID,id)==0)
{
returni;
}
}
return-1;
}/*通過姓名返回數組下標*/
intStudent_SearchByName(charname[])
{
inti;
for(i=0;i<num;i++)
{
if(strcmp(students[i].Name,name)==0)
{
returni;
}
}
return-1;
}/*顯示單條學生記錄*/
voidStudent_DisplaySingle(intindex)
{
printf("%10s%10s%8s%8s%8s%10s ","學號","姓名","成績","成績","成績","平均成績");
printf("------------------------------------------------------------- ");
printf("%10s%10s%8.2f%8.2f%8.2f%10.2f ",students[index].ID,students[index].Name,
students[index].Mark1,students[index].Mark2,students[index].Mark3,students[index].Average);
}/*插入學生信息*/
voidStudent_Insert()
{
while(1)
{
printf("請輸入學號:");
scanf("%s",&students[num].ID);
getchar();printf("請輸入姓名:");
scanf("%s",&students[num].Name);
getchar();printf("請輸入成績:");
scanf("%f",&students[num].Mark1);
getchar();printf("請輸入成績:");
scanf("%f",&students[num].Mark2);
getchar();printf("請輸入成績:");
scanf("%f",&students[num].Mark3);
getchar();students[num].Average=Avg(students[num]);
num++;printf("是否繼續?(y/n)");
if(getchar()=='n')
{
break;
}
}}/*修改學生信息*/
voidStudent_Modify()
{
//floatmark1,mark2,mark3;
while(1)
{
charid[20];
intindex;
printf("請輸入要修改的學生的學號:");
scanf("%s",&id);
getchar();
index=Student_SearchByIndex(id);
if(index==-1)
{
printf("學生不存在! ");
}
else
{
printf("你要修改的學生信息為: ");
Student_DisplaySingle(index);
printf("--請輸入新值-- ");
printf("請輸入學號:");
scanf("%s",&students[index].ID);
getchar();
printf("請輸入姓名:");
scanf("%s",&students[index].Name);
getchar();
printf("請輸入成績:");
scanf("%f",&students[index].Mark1);
getchar();
printf("請輸入成績:");
scanf("%f",&students[index].Mark2);
getchar();
printf("請輸入成績:");
scanf("%f",&students[index].Mark3);
getchar();
students[index].Average=Avg(students[index]);
}
printf("是否繼續?(y/n)");
if(getchar()=='n')
{
break;
}
}
}/*刪除學生信息*/
voidStudent_Delete()
{
inti;
while(1)
{
charid[20];
intindex;
printf("請輸入要刪除的學生的學號:");
scanf("%s",&id);
getchar();
index=Student_SearchByIndex(id);
if(index==-1)
{
printf("學生不存在! ");
}
else
{
printf("你要刪除的學生信息為: ");
Student_DisplaySingle(index);
printf("是否真的要刪除?(y/n)");
if(getchar()=='y')
{
for(i=index;i<num-1;i++)
{
students[i]=students[i+1];//把後邊的對象都向前移動
}
num--;
}
getchar();
}
printf("是否繼續?(y/n)");
if(getchar()=='n')
{
break;
}
}
}/*按姓名查詢*/
voidStudent_Select()
{
while(1)
{
charname[20];
intindex;
printf("請輸入要查詢的學生的姓名:");
scanf("%s",&name);
getchar();
index=Student_SearchByName(name);
if(index==-1)
{
printf("學生不存在! ");
}
else
{
printf("你要查詢的學生信息為: ");
Student_DisplaySingle(index);
}
printf("是否繼續?(y/n)");
if(getchar()=='n')
{
break;
}
}
}/*按平均值排序*/
voidStudent_SortByAverage()
{
inti,j;
structStudenttmp;
for(i=0;i<num;i++)
{
for(j=1;j<num-i;j++)
{
if(students[j-1].Average<students[j].Average)
{
tmp=students[j-1];
students[j-1]=students[j];
students[j]=tmp;
}
}
}
}/*顯示學生信息*/
voidStudent_Display()
{
inti;
printf("%10s%10s%8s%8s%8s%10s ","學號","姓名","成績","成績","成績","平均成績");
printf("------------------------------------------------------------- ");
for(i=0;i<num;i++)
{
printf("%10s%10s%8.2f%8.2f%8.2f%10.2f ",students[i].ID,students[i].Name,
students[i].Mark1,students[i].Mark2,students[i].Mark3,students[i].Average);
}
}/*將學生信息從文件讀出*/
voidIO_ReadInfo()
{
FILE*fp;
inti;
if((fp=fopen("Database.txt","rb"))==NULL)
{
printf("不能打開文件! ");
return;
}
if(fread(&num,sizeof(int),1,fp)!=1)
{
num=-1;
}
else
{
for(i=0;i<num;i++)
{
fread(&students[i],sizeof(structStudent),1,fp);
}
}
fclose(fp);
}/*將學生信息寫入文件*/
voidIO_WriteInfo()
{
FILE*fp;
inti;
if((fp=fopen("Database.txt","wb"))==NULL)
{
printf("不能打開文件! ");
return;
}
if(fwrite(&num,sizeof(int),1,fp)!=1)
{
printf("寫入文件錯誤! ");
}
for(i=0;i<num;i++)
{
if(fwrite(&students[i],sizeof(structStudent),1,fp)!=1)
{
printf("寫入文件錯誤! ");
}
}
fclose(fp);
}
/*主程序*/
voidmain()
{
intchoice;
IO_ReadInfo();
while(1)
{
/*主菜單*/
printf(" ------學生成績管理系統------ ");
printf("1.增加學生記錄 ");
printf("2.修改學生記錄 ");
printf("3.刪除學生記錄 ");
printf("4.按姓名查詢學生記錄 ");
printf("5.按平均成績排序 ");
printf("6.退出 ");
printf("請選擇(1-6):");
scanf("%d",&choice);
getchar();
switch(choice)
{
case1:
Student_Insert();
break;
case2:
Student_Modify();
break;
case3:
Student_Delete();
break;
case4:
Student_Select();
break;
case5:
Student_SortByAverage();
Student_Display();
break;
case6:
exit(0);
break;
}
IO_WriteInfo();
}
}