⑴ 用结构体数组存储学生信息，每个学生有姓名、学号、年龄和成绩。输入N（10）名学生信息，按成绩从高低
注意输入数据时的形式。
#include<stdio.h>
struct person
{int xuehao;
char name[20];
char sex;
int year;
int grade;
}man[80];
main()
{int n,i,max,k=0;
printf("一共有多少学生；");
scanf("%d",&n);
for(i=0;i<n;i++)
{scanf("%d,%d,%d,",&man[i].xuehao,&man[i].year,&man[i].grade);
scanf("%c,%s",&man[i].sex,&man[i].name);}
max=man[0].grade;
for(i=0;i<n;i++)
if(max<man[i].grade)
{max=man[i].grade;
k=i;}
printf("name sex xuehao year grade\n");
printf("--------------------------------------------------\n");
for(i=0;i<n;i++)
printf("%-12s%-4c%4d%8d%10d\n",man[i].name,man[i].sex,man[i].xuehao,man[i].year,man[i].grade);
printf("最高分的学生信息:\n");
printf("name sex xuehao year grade\n");
printf("--------------------------------------------------\n");
printf("%-12s%-4c%4d%8d%10d\n",man[k].name,man[k].sex,man[k].xuehao,man[k].year,man[k].grade);
}
⑵ 程序通过定义学生结构体数组，存储了若干名学生的学号、姓名和3门课的成绩
voidfun(structstudenta[],intn)
{//请完善该部分代码
inti,j;
for(i=0;i<n-1;i++)
for(j=0;j<n-1-i;j++)
if(strcmp(a[j].name,a[j+1].name)>0){
structstudenttmp=a[j];
a[j]=a[j+1];
a[j+1]=tmp;
}
}
⑶ 通过定义学生结构体变量存储学生的学号，姓名和三门成绩，程序已写但不清楚哪里出错了
1、更正后代码如下
#include <stdio.h>
struct Goal
{
float math;
float chinese;
float english;
};
struct Student
{
int number;//这里，学号是整型数字，不是数组
char name[25];
struct Goal goal;
}student= {13, "Jake", {98, 95.5, 90.5}};;
void main()
{
printf("the student number is=%d ", student.number);
printf("the student name is=%s ", student.name);//这里输出的时候，字符串是%s
printf("the student goal is=%f-%f-%f", student.goal.math, student.goal.chinese, student.goal.english);//浮点数输出的时候是%f
}
⑷ c语言中用一个结构体数组保存其相关学生信息，然后输入一个学号，检索该学号的信息。
这题目咋这么熟悉呢，好像我们当初c结课的时候课程设计就是这个。。。。这个很简单的.
#include
<stdio.h>
struct
student
{
/*这里面定义你的学生变量，学号啥的*/
};
int
main()
{
student
s[5];
int
num
=
0;
for(int
i
=
0;
i
<
5;
i++)
{
printf("请输入第%d个学生的信息\n",
i);
scanf(“%s”,
&s[i].name);//这里是输入第i个学生的名字啥的
自己补充吧
}
//求学生成绩总和
printf("total
=
%d\n",
(s[0].grade+s[1].grade+s[2].grade+s[3].grade+s[4].grade));//grade是在结构体中定义的，名字灵活写，定义什么写什么
//显示信息
printf("输入学号:");
scanf("%d",
&num);
printf("%d
%s
%d
%d\n",
s[num].num,
s[num].name,s[num].age,s[num].grade);//同之前结构体中变量
return
0;
}
⑸ 利用结构体数组，存储若干学生的姓名，学号，从键盘输入一个姓名（或学号），判断该人是否为该班学生
#include<stdio.h>
#define N 50 //根据班上人数可自由定
struct student
{
int num;
char name[10];
int grade[4];
}stu[N];
void print(struct student *p)
{
int b;
for(;p<stu+N;p++)
{
int average=0,score=0;
for(b=0;b<4;b++)
average+=p->grade[b];
score=average;
average=average/4;
printf("学号为%d的学生的平均分是%d,总分是%d\n",p->num,average,score);
}
}
void main()
{
int i,j;
printf("该班共有%d个学生\n",N);
for(i=0;i<N;i++)
{
printf("请输入第%d个学生的学号，姓名和四门课程的成绩:\n",i);
scanf("%d%s",&stu[i].num,stu[i].name);
for(j=0;j<4;j++)
scanf("%d",&stu[i].grade[j]);
putchar('\n');
}
print(stu);
printf("请输入所要选择的课程(在1，2，3，4中选数):\n");
int a,b;
scanf("%d",&a);
for(b=0;b<N;b++)
{
if(stu[b].grade[a]>=90)
{
printf("学号为%d的学生的各门课程的成绩为:\n",stu[b].num);
for(i=0;i<4;i++)
printf("%d\n",stu[b].grade[i]);
}
else printf("没有\n");
}
}
⑹ 使用结构体数组，存储全班同学的姓名、学号和C语言成绩。
#include<stdio.h>
#include<string.h>
#defineN4//假设学生数为N=4个
structstudent{
charsno[14];
charname[10];
intscore;
};
intmain()
{
students[]={
"20140001","张三",90,
"20140002","李四",91,
"20140003","王五",92,
"20140004","阿六",89
};
charsno[14];
inti,j,k;
printf("请输入查询的学生学号: ");
gets(sno);
for(i=0;i<N;i++)//查找该生的记录号i
if(strcmp(sno,s[i].sno)==0)break;
if(i<N){
printf("========================================== ");
k=0;
for(j=0;j<N;j++)if(s[j].score>s[i].score)k++;//计算名次
printf("%14s%10s%d排名:%d ",s[i].sno,s[i].name,s[i].score,k+1);
}
else
printf("查无此人 ");
}
⑺ 完成一个学生成绩管理信息系统。要求：（1）使用结构体数组存储学生的学号、姓名、性别、C语言成绩；（
#include<stdio.h> /*引用库函数*/
#include<stdlib.h>
#include<ctype.h>
#include<string.h>
typedef struct /*定义结构体数组*/
{
char num[10]; /*学号*/
char name[20]; /*姓名*/
int score; /*成绩*/
}Student;
Student stu[80]; /*结构体数组变量*/
int menu_select() /*菜单函数*/
{
char c;
do{
system("cls"); /*运行前清屏*/
printf("\t\t****Students' Grade Management System****\n"); /*菜单选择*/
printf("\t\t | 1. Input Records |\n");
printf("\t\t | 2. Display All Records |\n");
printf("\t\t | 3. Sort |\n");
printf("\t\t | 4. Insert a Record |\n");
printf("\t\t | 5. Delete a Record |\n");
printf("\t\t | 6. Query |\n");
printf("\t\t | 7. Statistic |\n");
printf("\t\t | 8. Add Records from a Text File|\n");
printf("\t\t | 9. Write to a Text file |\n");
printf("\t\t | 0. Quit |\n");
printf("\t\t*****************************************\n");
printf("\t\t\tGive your Choice(0-9):");
c=getchar(); /*读入选择*/
}while(c<'0'||c>'9');
return(c-'0'); /*返回选择*/
}
int Input(Student stud[],int n) /*输入若干条记录*/
{int i=0; char sign,x[10]; /*x[10]为清除多余的数据所用*/ while(sign!='n'&&sign!='N') /*判断*/ { printf("\t\t\tstudent's num:"); /*交互输入*/ scanf("\t\t\t%s",stud[n+i].num); printf("\t\t\tstudent's name:"); scanf("\t\t\t%s",stud[n+i].name); printf("\t\t\tstudent's score:"); scanf("\t\t\t%d",&stud[n+i].score); gets(x); /*清除多余的输入*/ printf("\t\t\tany more records?(Y/N)"); scanf("\t\t\t%c",&sign); /*输入判断*/ i++; }
return(n+i);
}
void Display(Student stud[],int n) /*显示所有记录*/
{
int i;
printf("\t\t\t-----------------------------------\n"); /*格式头*/
printf("\t\t\tnumber name score\n");
printf("\t\t\t-----------------------------------\n");
for(i=1;i<n+1;i++) /*循环输入*/
{
printf("\t\t\t%-16s%-15s%d\n",stud[i-1].num,stud[i-1].name,stud[i-1].score);
if(i>1&&i%10==0) /*每十个暂停*/
{printf("\t\t\t-----------------------------------\n"); /*格式*/ printf("\t\t\t"); system("pause"); printf("\t\t\t-----------------------------------\n"); }
}
printf("\t\t\t");
system("pause");
}
void Sort_by_num(Student stud[],int n) /*按学号排序*/
{ int i,j,*p,*q,s;
char t[10];
for(i=0;i<n-1;i++) /*冒泡法排序*/
for(j=0;j<n-1-i;j++)
if(strcmp(stud[j].num,stud[j+1].num)>0)
{strcpy(t,stud[j+1].num); strcpy(stud[j+1].num,stud[j].num); strcpy(stud[j].num,t); strcpy(t,stud[j+1].name); strcpy(stud[j+1].name,stud[j].name); strcpy(stud[j].name,t); p=&stud[j+1].score; q=&stud[j].score; s=*p; *p=*q; *q=s; }
}
int Insert_a_record(Student stud[],int n) /*插入一条记录*/
{char x[10]; /*清除多余输入所用*/ printf("\t\t\tstudent's num:"); /*交互式输入*/ scanf("\t\t\t%s",stud[n].num); printf("\t\t\tstudent's name:"); scanf("\t\t\t%s",stud[n].name); printf("\t\t\tstudent's score:"); scanf("\t\t\t%d",&stud[n].score); gets(x); n++; Sort_by_num(stud,n); /*调用排序函数*/ printf("\t\t\tInsert Successed!\n"); /*返回成功信息*/ return(n); }
int Delete_a_record(Student stud[],int n) /*按姓名查找，删除一条记录*/
{ char s[20];
int i=0,j;
printf("\t\t\ttell me his(her) name:"); /*交互式问寻*/
scanf("%s",s);
while(strcmp(stud[i].name,s)!=0&&i<n) i++; /*查找判断*/
if(i==n)
{ printf("\t\t\tnot find!\n"); /*返回失败信息*/
return(n);
}
for(j=i;j<n-1;j++) /*删除操作*/
{
strcpy(stud[j].num,stud[j+1].num);
strcpy(stud[j].name,stud[j+1].name);
stud[j].score=stud[j+1].score;
}
printf("\t\t\tDelete Successed!\n"); /*返回成功信息*/
return(n-1);
}
void Query_a_record(Student stud[],int n) /*查找并显示一个记录*/
{ char s[20];
int i=0;
printf("\t\t\tinput his(her) name:"); /*交互式输入*/
scanf("\t\t\t%s",s);
while(strcmp(stud[i].name,s)!=0&&i<n) i++; /*查找判断*/
if(i==n)
{ printf("\t\t\tnot find!\n"); /*输入失败信息*/
return;
}
printf("\t\t\this(her) number:%s\n",stud[i].num); /*输出该学生信息*/
printf("\t\t\this(her) score:%d\n",stud[i].score);
}
void Statistic(Student stud[],int n) /*新增功能，输出统计信息*/
{ int i,j=0,k=0,sum=0;
float aver; /*成绩平均值*/
for(i=0;i<n;i++) /*循环输入判断*/
{
sum+=stud[i].score;
if(stud[j].score>stud[i].score) j=i;
if(stud[k].score<stud[i].score) k=i;
}
aver=1.0*sum/n;
printf("\t\t\tthere are %d records.\n",n); /*总共记录数*/
printf("\t\t\tthe hignest score:\n"); /*最高分*/
printf("\t\t\tnumber:%s name:%s score:%d\n",stud[j].num,stud[j].name,stud[j].score);
printf("\t\t\tthe lowest score:\n"); /*最低分*/
printf("\t\t\tnumber:%s name:%s score:%d\n",stud[k].num,stud[k].name,stud[k].score);
printf("\t\t\tthe average score is %5.2f\n",aver); /*平均分*/
}
int AddfromText(Student stud[],int n) /*从文件中读入数据*/
{ int i=0,num;
FILE *fp; /*定义文件指针*/
char filename[20]; /*定义文件名*/
printf("\t\t\tInput the filename:");
scanf("\t\t\t%s",filename); /*输入文件名*/
if((fp=fopen(filename,"rb"))==NULL) /*打开文件*/
{ printf("\t\t\tcann't open the file\n"); /*打开失败信息*/
printf("\t\t\t");
system("pause");
return(n);
}
fscanf(fp,"%d",&num); /*读入总记录量*/
while(i<num) /*循环读入数据*/
{
fscanf(fp,"%s%s%d",stud[n+i].num,stud[n+i].name,&stud[n+i].score);
i++;
}
n+=num;
fclose(fp); /*关闭文件*/
printf("\t\t\tSuccessed!\n");
printf("\t\t\t");
system("pause");
return(n);
}
void WritetoText(Student stud[],int n) /*将所有记录写入文件*/
{
int i=0;
FILE *fp; /*定义文件指针*/
char filename[20]; /*定义文件名*/
printf("\t\t\tWrite Records to a Text File\n"); /*输入文件名*/
printf("\t\t\tInput the filename:");
scanf("\t\t\t%s",filename);
if((fp=fopen(filename,"w"))==NULL) /*打开文件*/
{
printf("\t\t\tcann't open the file\n");
system("pause");
return;
}
fprintf(fp,"%d\n",n); /*循环写入数据*/
while(i<n)
{
fprintf(fp,"%-16s%-15s%d\n",stud[i].num,stud[i].name,stud[i].score);
i++;
}
fclose(fp); /*关闭文件*/
printf("Successed!\n"); /*返回成功信息*/
}
void main() /*主函数*/
{
int n=0;
for(;;)
{
switch(menu_select()) /*选择判断*/
{
case 1:
printf("\t\t\tInput Records\n"); /*输入若干条记录*/
n=Input(stu,n);
break;
case 2:
printf("\t\t\tDisplay All Records\n"); /*显示所有记录*/
Display(stu,n);
break;
case 3:
printf("\t\t\tSort\n");
Sort_by_num(stu,n); /*按学号排序*/
printf("\t\t\tSort Suceessed!\n");
printf("\t\t\t");
system("pause");
break;
case 4:
printf("\t\t\tInsert a Record\n");
n=Insert_a_record(stu,n); /*插入一条记录*/
printf("\t\t\t");
system("pause");
break;
case 5:
printf("\t\t\tDelete a Record\n");
n=Delete_a_record(stu,n); /*按姓名查找，删除一条记录*/
printf("\t\t\t");
system("pause");
break;
case 6:
printf("\t\t\tQuery\n");
Query_a_record(stu,n); /*查找并显示一个记录*/
printf("\t\t\t");
system("pause");
break;
case 7:
printf("\t\t\tStatistic\n");
Statistic(stu,n); /*新增功能，输出统计信息*/
printf("\t\t\t");
system("pause");
break;
case 8:
printf("\t\t\tAdd Records from a Text File\n");
n=AddfromText(stu,n); /*新增功能，输出统计信息*/
break;
case 9:
printf("\t\t\tWrite to a Text file\n");
WritetoText(stu,n); /*循环写入数据*/
printf("\t\t\t");
system("pause");
break;
case 0:
printf("\t\t\tHave a Good Luck,Bye-bye!\n"); /*结束程序*/
printf("\t\t\t");
system("pause");
exit(0);
}
}
}
⑻ 定义一个结构体数组，存放5个学生的学号，姓名，三门课的成绩
按下面代码进行修改就可以了
#include<stdio.h>
#include<stdlib.h>
typedef struct student
{
int num;
char name[20];
int score;
}stu ;
int main(){
int i,s=0;
int j=0;
stu temp;
float aver;
stu a[5];
for(i=0;i<5;i++){
scanf("%d %s %d",&a[i].num,a[i].name,&a[i].score);
}
for(i=0;i<5;i++){
for(j=i+1;j<5;j++){
if(a[i].score<a[j].score)
{
temp=a[i];
a[i]=a[j];
a[j]=temp;
}
}
}
for(i=0;i<5;i++){
printf("a[%d] ==",i);
printf("%d %s %d\n",a[i].num,a[i].name,a[i].score);
s=a[i].score +s;
}
aver=s/5;
printf("学生平均分是:%.2f\n",aver);
return 0;
}