c语言学生选修课程系统_学生选课系统C语言程序

1. c语言编写学生选课系统

#include<stdio.h>
#include<conio.h>
#include<string.h>
#include<stdlib.h>
//#include<iostream.h>
void clrscr(void)
{
system("cls");
}
char *getpass(char s[])
{
char *pass,ch;
int i;
pass=new char[100];
i=0;
pass[0]='\0';
printf("%s",s);
while(1)
{
ch=getch();
if(ch!=13)
{
printf("*");
pass[i]=ch;
i++;
pass[i]='\0';
}
else break;
}
//scanf("%s",pass);
return pass;
}
struct course
{
char name[20];
int score;
int students_limited;
course *pNext;
};

struct user
{
char name[20];
char password[17];
char coursename[20];
user *pNext;
};

int Login()
{
char key;

ST1:
clrscr();
printf("\n\n\n\n\n\n\n\t\t\tWelcome to Course System!");
printf("\n\n");
printf("\n\t\t\t1. Login with Administrator");
printf("\n\t\t\t2. Login with Users");
printf("\n\t\t\t0. Exit");
key=getch();

switch(key)
{
case '1' : return 1;
case '2' : return 2;
case '0' : return 0;
default : printf("\n\n\t\t\tInput wrong!\n\t\t\t\tPress any key to continue...");
getch();
goto ST1;
}
}

course *readcourse()
{
FILE *fp;
book *pHead,*pTemp,*pLast;

fp=fopen("coursemsg.dat","r");
if(fp==NULL)
{
printf("\n\n\t\t\tOpen course message file failed!");
return NULL;
}
pHead=NULL;
while(!feof(fp))
{
pTemp=new course;
if(fread(pTemp,sizeof(course),1,fp)!=1)
{
delete pTemp;
break;
}
if(pHead==NULL)
{
pHead=pTemp;
pLast=pTemp;
}
pLast->pNext=pTemp;
pTemp->pNext=NULL;
pLast=pTemp;
}//while
fclose(fp);
return pHead;
}

void writecoursetofile(course *pHead)
{
FILE *fp;
course *pTemp,*pNext;

fp=fopen("coursemsg.dat","w");
for(pTemp=pHead;pTemp;pTemp=pTemp->pNext)
fwrite(pTemp,sizeof(course),1,fp);
fclose(fp);
}

void Add_course()
{
course one,*p;
int i,j;
FILE *fp;

p=&one;
while(1)
{
clrscr();
printf("\n\n\n\n\n\n\n\n\t\tPlease input the name of course(-1 to end):");
//cin>>p->name;
scanf("%s",p->name);
if(!strcmp(p->name,"-1"))break;
i=0;
while(1)
{
if(p->name[i]=='\0')break;
else i++;
}
for(j=i;j<20;j++)p->name[j]='\0';
printf("\n\t\tInput it's scores:");
//cin>>p->score;
scanf("%d",&p->score);
fp=fopen("coursemsg.dat","a+");
fwrite(p,sizeof(course),1,fp);
fclose(fp);
printf("\n\n\t\tAdd course message OK!");
printf("\n\t\t\tPress any key to countinue...");
getch();
}
}

void Del_course()
{
course *pHead,*pNewHead,*pTemp,*pLast;
char name[20];

pHead=readcourse();
printf("\n\t\tPlease input the name of course to be delete:");
gets(name);

while(strcmp(pHead->name,name)==0)
{
pNewHead=pHead->pNext;
printf("\n\n\t\t--%s had been deleted" ,name);
delete pHead;
pHead=pNewHead;
}
for(pTemp=pHead,pLast=pHead;pTemp!=NULL;pLast=pTemp,pTemp=pTemp->pNext)
{
if(strcmp(pTemp->name,name)==0)
{
pLast->pNext=pTemp->pNext;
printf("\n\n\t\t--%s had been deleted" ,name);
delete pTemp;
pTemp=pLast;
}
}//for
writecoursetofile(pHead);
getch();
}

void course_Op()
{
char key;

ST3:
clrscr();
printf("\n\n\n\n\n\n\n\n\t\t\t\t1. Add Course");
printf("\n\t\t\t\t2. Delete Course");
printf("\n\t\t\t\t0. EXIT");
key=getch();
switch(key)
{
case '1' : Add_course();break;
case '2' : Del_course();break;
case '0' : goto _End;
default : printf("\n\tInput wrong!\n\tPress any key to continue...");
getch();
}
goto ST3;

_End:
;
}

void Add_user()
{
FILE *fp;
char name[20],*na,password[6],*pa;
int i,j;
user one,*p;

p=&one;
pa=password;
na=name;

while(1)
{
clrscr();
printf("\n\n\n\n\n\n\n\t\tPlease input user's name(-1 to end):");
gets(name);
if(!strcmp(name,"-1"))break;
pa=getpass("\n\t\tPlease input new password:");
strcpy(p->name,na);
strcpy(p->password,pa);
fp=fopen("usermsg.dat","ab+");
fwrite(p,sizeof(user),1,fp);
fclose(fp);
printf("\n\t\tuser's message has been saved!");
printf("\n\t\tPress any key to countinue...");
getch();
}
}
user *readcusmsg()
{
FILE *fp;
user *pHead,*pTemp,*pLast;

fp=fopen("usermsg.dat","rb");
if(fp==NULL)
{
printf("\n\nOpen user's message file failed");
return NULL;
}
pHead=NULL;

while(!feof(fp))
{
pTemp=new user;
if(fread(pTemp,sizeof(user),1,fp)!=1)
{
delete pTemp;
break;
}
if(pHead==NULL)
{
pHead=pTemp;
pLast=pTemp;
}
pLast->pNext=pTemp;
pTemp->pNext=NULL;
pLast=pTemp;
}//while
fclose(fp);
return pHead;
}

void writecusmsgtofile(user *pHead)
{
FILE *fp;
user *pTemp,*pNext;

fp=fopen("usermsg.dat","wb");
for(pTemp=pHead;pTemp;pTemp=pTemp->pNext)
fwrite(pTemp,sizeof(user),1,fp);
fclose(fp);
}

void user_Op()
{
char key;

ST4:
clrscr();
printf("\n\n\n\n\n\n\n\n\t\t\t\t1. Add Users");
printf("\n\t\t\t\t0. EXIT");
key=getch();

switch(key)
{
case '1' : Add_user();break;
case '0' : goto _End;
default : printf("\n\tInput wrong!\n\tPress any key to continue...");
getch();
}
goto ST4;

_End:;
}

void List_all_course()
{
course *pHead,*pTemp;
int Count=0,tense;

pHead=readcourse();
if(!pHead)
{
printf("\n\t(No data)");
exit(0);
}
printf("\n%30s%8s%10s","course name","Score","Tense");

for(pTemp=pHead;pTemp!=NULL;pTemp=pTemp->pNext)
{
if(pTemp->n>0)tense=1;
else tense=0;
printf("\n%30s%8d%10d",pTemp->name,pTemp->score,tense);
Count++;
if(Count%20==0){printf("Press any key to countinue...");getch();}
}
getch();
}

void Search_course_name()
{
char name[20];
int tense,k=1;
book *pHead,*pTemp,*pNext;

printf("\n\tPlease input the name of the course you want to search:");
gets(name);
pHead=readcourse();
for(pTemp=pHead;pTemp!=NULL;pTemp=pTemp->pNext)
if(!strcmp(pTemp->name,name))
{
if(pTemp->n>0)tense=1;
else tense=0;
k=0;
printf("\n%30s%8d%10d",pTemp->name,pTemp->score,tense);
}
if(k)
{
printf("\n\n\t\tThere's no course named %s",name);
printf("\n\t\t\tPress any key to countinue...");
}
getch();
}

void course_Search()
{
char key;

ST5:
clrscr();
printf("\n\n\n\n\n\n\t\t\t\t1. List all course");
printf("\n\t\t\t\t2. Search by the name of course");
printf("\n\t\t\t\t0. EXIT");
key=getch();

switch(key)
{
case '1' : List_all_course();break;
case '2' : Search_course_name();break;
case '0' : goto _End;
default : printf("\n\t\t\tInput wrong!\n\t\t\tPress any key to continue...");
getch();
}
goto ST5;

_End:;
}

void Pass(int Res)
{
FILE *fp;
char psw[17],*p,pass_in[17],user_name[20];
user *pHead,*pTemp;
int i,k=0;

clrscr();
p=pass;

if(Res==1)
{
if(!(fp=fopen("adm.psw","rb")))
{
printf("\n\n\n\n\n\n\n\t\tWelcome!\n\t******Login Administrator******");
p=getpass("\n\tPlease input your new password:");
fp=fopen("adm.psw","wb");
fprintf(fp,"%s",p);
fclose(fp);
}
else
{
fscanf(fp,"%s",pass_in);
fclose(fp);
printf("\n\n\n\n\n\n\t******Login by Administrator******");
p=getpass("\n\n\t\t\tPlease input your password:");
if(strcmp(p,pass_in))
{
printf("\n\t\tYour Password is wrong!");
printf("\n\t\tPress any key to EXIT...");
getch();
exit(0);
}//if_else
}
Adm_List();
}//if
else
{
printf("\n\n\n\n\n\n\n\n\t\t\t\tWelcome!");
printf("\n\t\t\t******Login by User******");
printf("\n\t\t\tPlease input your name:");
scanf("%s",user_name);
p=getpass("\n\t\t\tPlease input your password:");
pHead=reaser();
for(pTemp=pHead;pTemp!=NULL;pTemp=pTemp->pNext)
if(!strcmp(pTemp->name,user_name))
if(strcmp(pTemp->password,p))
{
k=1;
printf("\n\t\t\tYour password is wrong!");
printf("\n\t\t\t\tPress any key to EXIT...");
getch();
exit(0);
}//if_else
}//psw

int main()
{
int Res;

clrscr();
printf("\n\n\n\n\n\n\n\n");
printf("\n\t*****************************************************************");
printf("\n\t* courses System *");
printf("\n\t* *");
printf("\n\t* QiuYong No.20052419 *");
printf("\n\t* *");
printf("\n\t* 2006-7-20 *");
printf("\n\t*****************************************************************");
printf("\n\t\t\t\t\t\tPress any key to countinue...");
getch();

START:
Res=login();
if(Res==0)goto End;
else if(Res==3)Help();
else Psw(Res);
goto START;

End:
clrscr();
printf("\n\n\n\n\n\n\t\t\tGoodBye ^_^");
return 0;
}

2. C语言程序设计之学生选修课程管理系统。

#include <stdio.h>
#include <stdlib.h>
#include <string.h>struct student
{
char name[60];
char ID[7];
int score;
};int dq(struct student st[]);
void xianshi();
void bc(struct student st[]);
void add();
void select();
void zz();
void chazhao();
void xhcz();
void xmcz();
void del();
void xmsc();
void xhsc();
void tj();
void px();
void bjg();
void xg();
void xhxg();
void xmxg();
void bca();
void fh();
struct student st[300]; //这个数组用来保存所有的学生信息和文件里面的一致
int Number=0; //记录总的学生人数也就是数组/文件里面的学生人数
void main()
{
int choose=0;
FILE *fp=NULL;
char yesorno;

if((fp=fopen("C://student.dat","rb"))==NULL)
{
printf("\n=========>提示：文件不存在，是否要创建一个?(y/n)\n");
scanf("%c",&yesorno);
if(yesorno=='y'||yesorno=='Y')
{

//这里仅为了建立文件
fp=fopen("C://student.dat","wb");
fclose(fp);
}
else
exit(0);
}
else
{
Number=dq(st); //要是文件只能够已经有数据将数据初始化到数组中
}
system("cls");
while(true)
{
xianshi();
printf("\t\t====>请选择：");
scanf("%d",&choose);
system("cls");
switch(choose)
{
case 0: exit(0);
//退出
break;
case 1: add();
fh();//增加学生成绩
break;
case 2: select();
fh();//查看学生成绩
break;
case 3: chazhao();
fh();// 查找
break;
case 4: del();
fh();//删除
break;
case 5: tj();
fh();//统计
break;
case 6: px();
fh();//排序
break;
case 7: bjg();
fh();//输出不及格
break;
case 8: xg();
fh();//修改
break;
case 9:zz();
fh();//作者
break;
case 10:bca();
fh();//保存

break;
default:
break;
}
fflush(stdin);
getchar();
system("cls");
}
}
void bca()
{
printf("\t=====程序在运行时已自动保存.....\n");
}
void fh()
{
printf("\t===>按Enter键返回主菜单\n");
}
void xg() //修改学生信息
{
int way=0;
printf("请选择修改查找方式\n");
printf("1 按姓名查找修改\n");
printf("2 按学号查找修改\n");
scanf("%d",&way);
switch(way)
{
case 1: xmxg();
break;
case 2: xhxg();
break;
default: printf("输入有误，结束!\n");
break;
}
}
//按姓名修改
void xmxg()
{
FILE *fp=NULL;
char name[60];
int i=0;
int changeIndex=0;
int index=0;
printf("请输入要修改的学生姓名：");
scanf("%s",name);
for (i=0;i<Number;i++)
{
if (strcmp(name,st[i].name))
{
changeIndex=i; //保存要修改的人的下标
}
break;
}
printf("\t姓名\t学号\t成绩\n");
printf("\t%s\t%s\t%d\n\n",st[changeIndex].name,st[changeIndex].ID,st[changeIndex].score);
printf("请重新输入该学生信息");
printf("姓名：");
scanf("%s",st[changeIndex].name);
printf("学号：");
scanf("%s",st[changeIndex].ID);
printf("成绩：");
scanf("%d",&st[changeIndex].score); //信息修改后重新更新文件里面的数据以保持数据一致性
fp=fopen("C://student.dat","wb");
for (i=0;i<Number;i++)
{
fwrite(&st[i],sizeof(struct student),1,fp);
}
fclose(fp);
}
void xhxg()//按学号修改
{
FILE *fp=NULL;
char id[60];
int i=0;
int changeIndex=0;
int index=0;
printf("请输入要修改的学生学号：");
scanf("%s",id);
for (i=0;i<Number;i++)
{
if (strcmp(id,st[i].ID))
{
changeIndex=i; //保存要修改的人的下标
}
break;
}
printf("\t姓名\t学号\t成绩\n");
printf("\t%s\t%s\t%d\n\n",st[changeIndex].name,st[changeIndex].ID,st[changeIndex].score);
printf("请重新输入该学生信息");
printf("姓名：");
scanf("%s",st[changeIndex].name);
printf("学号：");
scanf("%s",st[changeIndex].ID);
printf("成绩：");
scanf("%d",&st[changeIndex].score);

//信息修改后重新更新文件里面的数据以保持数据一致性
fp=fopen("C://student.dat","wb");
for (i=0;i<Number;i++)
{
fwrite(&st[i],sizeof(struct student),1,fp);
}
fclose(fp);
printf("\t=======>修改成功\n");
}void bjg() //输出不及格人数
{
int i=0;
printf("以下是不及格:\n");
printf("\t姓名\t学号\t成绩\n");
for (i=0;i<Number;i++)
{
if (st[i].score<60)
{
printf("\t%s\t%s\t%d\n",st[i].name,st[i].ID,st[i].score);
}
}
}
void px()//排序
{
struct student temp;
int wantNUmber=0;
int i=0;
int j=0;
for(i=0;i<Number-1;i++)
{
for(j=i;j<Number-1;j++)
{
if(st[j].score>st[j+1].score)
{
temp=st[j];
st[j]=st[j+1];
st[j+1]=temp;
}
}
}
printf("你想输出前几名的成绩：");
scanf("%d",&wantNUmber);
if (wantNUmber>Number)
{
wantNUmber=Number;
} printf("\t姓名\t学号\t成绩\n");
for(i=0;i<wantNUmber;i++)
{
printf("\t%s\t%s\t%d\n",st[i].name,st[i].ID,st[i].score);
}
}
void tj()//统计
{
int i=0;
double sum=0.0;
for(i=0;i<Number;i++)
{
sum+=st[i].score;
}
printf("全班总分为：%f\n",sum);
printf("平均分为：%f\n",sum/Number);
}
void del()//删除
{
int n=0;
printf("1 按姓名删除\n");
printf("2 按学号删除\n");
scanf("%d",&n);
switch(n)
{
case 1: xmsc();
break;
case 2: xhsc();
break;
}
}
void xmsc()//按姓名删除
{
FILE *fp=NULL;
char name[60];
int i=0;
int j=0;
printf("请输入要删除的学生姓名：");
scanf("%s",name);
for(i=0;i<Number;i++)
{
if (strcmp(name,st[i].name)==0) //如果查找到就删除
{
for (j=i;j<Number-1;j++)
{
st[j]=st[j+1];
}
Number--;
}
} //将剩余数据写入文件重新一写的方式打开文件把以前的数据擦除了
fp=fopen("C://student.dat","wb");
for (i=0;i<Number;i++)
{
fwrite(&st[i],sizeof(struct student),1,fp);
}
fclose(fp);
printf("删除成功;\n");

}
void xhsc()//按学号删除
{
FILE *fp=NULL;
char id[60];
int i=0;
int j=0;
printf("请输入要删除的学生学号：");
scanf("%s",id);
for(i=0;i<Number;i++)
{
if (strcmp(id,st[i].ID)==0) //如果查找到就删除
{
for (j=i;j<Number-1;j++)
{
st[j]=st[j+1];
}
Number--;
}
}

//将剩余数据写入文件重新一写的方式打开文件把以前的数据擦除了
fp=fopen("C://student.dat","wb");
for (i=0;i<Number;i++)
{
fwrite(&st[i],sizeof(struct student),1,fp);
}
fclose(fp);
printf("删除成功;\n");
}
void chazhao()//查找学生
{
int n=0;
printf("1 按姓名查找\n");
printf("2 按学号查找\n");
scanf("%d",&n);
switch(n)
{
case 1: xmcz();
break;
case 2: xhcz();
break;
default: printf("输入有误，结束!\n");
break;
}
}
void xhcz()//按学号查找
{
char id[7];
int i=0;
printf("请输入要查找学生学号:");
scanf("%s",id);
system("cls");
printf("\t姓名\t学号\t成绩\n");
for (i=0;i<Number;i++)
{
if (strcmp(id,st[i].ID)==0)
{
printf("\t%s\t%s\t%d\n",st[i].name,st[i].ID,st[i].score);
}
}
}
void xmcz()//按姓名查找
{
char name[7];
int i=0;
printf("请输入要查找学生姓名:");
scanf("%s",name);
system("cls");
printf("\t姓名\t学号\t成绩\n");
for (i=0;i<Number;i++)
{
if (strcmp(name,st[i].name)==0)
{
printf("\t%s\t%s\t%d\n",st[i].name,st[i].ID,st[i].score);
}
}
}
void zz()
{
printf("\t**********************************************************\n\n");
printf("\t^^^^^^^^^^ 武汉工程大学邮电与信息工程学院 ^^^^^^^^^^\n\n");
printf("\t^^^^^^^^^ 07网络与安全管理2班 ^^^^^^^^^\n\n");
printf("\t^^^^^^^^ 易樊制作 ^^^^^^^^\n\n");
printf("\t^^^^^^^^^ 禁止CTRL+C 谢谢合作 ^^^^^^^^^\n\n");
printf("\t^^^^^^^^^^ QQ:895115828\n\n");
printf("\t**********************************************************\n\n");
}
void select()//查看学生
{
int i=0;
printf("以下是全部学生成绩\n");
printf("\t姓名\t学号\t成绩\n");
for(i=0;i<Number;i++)
{
printf("\t%s\t%s\t%d\n",st[i].name,st[i].ID,st[i].score);
}
}
void add()//增加学生
{
int numberTemp=0;
int i=0;
struct student temp; //临时保存信息
printf("请输入要增加学生成绩个数：");
scanf("%d",&numberTemp);
for(i=0;i<numberTemp;i++)
{
printf("输入第%d个同学信息\n",i+1);
printf("姓名：");
scanf("%s",temp.name);
printf("学号：");
scanf("%s",temp.ID);
printf("成绩：");
scanf("%d",&temp.score);
st[Number++]=temp; //将刚添加的写入到数组
bc(&temp); //将刚添加的写入到文件 }
printf("添加成功\n");
}
void bc(struct student *st)
{
FILE *fp=NULL;
fp=fopen("C://student.dat","ab+");
fwrite(st,sizeof(struct student),1,fp);
fclose(fp);
}
int dq(struct student st[])
{
FILE *fp=NULL;
int i=0;
fp=fopen("C://student.dat","rb");
while(fread(&st[i],sizeof(struct student),1,fp))
i++;
fclose(fp);
return i;
}
void xianshi()
{
printf("\t*****************************************************************\n");
printf("\t* *\n");
printf("\t* 学生成绩管理系统 *\n");
printf("\t* *\n");
printf("\t* [1] 增加学生成绩 [2] 查看学生成绩 *\n");
printf("\t* [3] 查找学生成绩 [4] 删除学生成绩 *\n");
printf("\t* [5] 统计（总成绩和平均分） [6] 输出前N名学生成绩 *\n");
printf("\t* [7] 输出不及格人数 [8] 修改学生信息 *\n");
printf("\t* [9] 关于作者 [10] 保存数据 *\n");
printf("\t* [0] 退出系统 *\n");
printf("\t*****************************************************************\n");
}运行成功，请你下去后慢慢研究下这个程序，很简单的，祝你成功！~

3. c语言学生选修课程管理系统

4. C语言设计,学生选修课程系统，高手指点下，不然挂科了，谢谢！

网上找的

#include "stdio.h"
#include "stdlib.h"
#include "string.h"
typedef struct subjects
{
int num;
char name[20];
char kind[10];
int stime;
int ttime;
int etime;
int score;
int term;
struct subjects *next;
}SUB;

SUB *create_form()
{
SUB *head,*tail,*p;
int num,stime,ttime;
int etime,score,term;
char name[20],kind[10];
int size=sizeof(SUB);
head=tail=NULL;
printf("输入选修课程信息:\n");
scanf("%d%s%s%d%d%d%d%d",&num,name,kind,&stime,&ttime,&etime,&score,&term);
while(num!=0){
p=(SUB *)malloc(size);
p->num=num;
strcpy(p->name,name);
strcpy(p->kind,kind);
p->stime=stime;
p->ttime=ttime;
p->etime=etime;
p->score=score;
p->term=term;
if(head==NULL)
head=p;
else
tail->next=p;
tail=p;
scanf("%d%s%s%d%d%d%d%d",&num,name,kind,&stime,&ttime,&etime,&score,&term);
}
tail->next=NULL;
return head;
}

void savefile(SUB *head)
{
SUB *p;
FILE *fp;
fp=fopen("subjects.txt","w");
fprintf(fp,"课程编号课程名称课程性质总学时授课学时实验或上机学时学分开课学期\n");
for(p=head;p;p=p->next)
fprintf(fp,"%5d%12s%9s%9d%9d%11d%11d%7d\n",p->num,p->name,p->kind,p->stime,p->ttime,p->etime,p->score,p->term);
fclose(fp);
}

void savefileadd(SUB *head)
{
SUB *p;
FILE *fp;
fp=fopen("subjectsadd.txt","w");
fprintf(fp,"课程编号课程名称课程性质总学时授课学时实验或上机学时学分开课学期\n");
for(p=head;p;p=p->next)
fprintf(fp,"%5d%12s%9s%9d%9d%11d%11d%7d\n",p->num,p->name,p->kind,p->stime,p->ttime,p->etime,p->score,p->term);
fclose(fp);
}

void savefiledel(SUB *head)
{
SUB *p;
FILE *fp;
fp=fopen("subjectsdel.txt","w");
fprintf(fp,"课程编号课程名称课程性质总学时授课学时实验或上机学时学分开课学期\n");
for(p=head;p;p=p->next)
fprintf(fp,"%5d%12s%9s%9d%9d%11d%11d%7d\n",p->num,p->name,p->kind,p->stime,p->ttime,p->etime,p->score,p->term);
fclose(fp);
}

void prin(SUB *head)
{
SUB *ptr;
if(head==NULL){
printf("NO RECORDS!\n");
return;
}
printf("课程编号课程名称课程性质总学时授课学时实践或上机学时学分开课学期\n");
for(ptr=head;ptr;ptr=ptr->next)
printf("%5d%12s%9s%9d%9d%11d%11d%7d\n",ptr->num,ptr->name,ptr->kind,ptr->stime,ptr->ttime,ptr->etime,ptr->score,ptr->term);
}

void search(SUB *head)
{
int a,num;
int t=1;
char type[10];
char ch='a',ch1;
SUB *ptr;

while(ch!=' '){
printf("若要按课程性质查找请输入1，若要按学分查找请输入2:\n");
scanf("%d",&a);
switch(a){
case 1:printf("请输入要查找的课程的性质:\n");
scanf("%s",type);
printf("课程编号课程名称课程性质总学时授课学时实践或上机学时学分开课学期\n");

5. 学生选课系统C语言程序

根据自己的需要，自己看着修改一下 ^^
#include<stdio.h>
#include<stdlib.h>
int N1,N2,kk1,kk2,kk3;
struct couse * head1;
struct student * head2;
struct couse//课程信息结构体
{
int num1;
char name1[20];
int score;
int nelepeo;//课程已选人数
int Melepeo;//课程人数上限
struct couse * next;
};
struct student//学生信息结构体
{
int num2;
char name2[20];
int nelenum[50];//已选课程编号
int nelen;//已选课程数量
struct student * next;
};
void Ms()
{
for(kk1=0;kk1<1100;kk1++)
for(kk2=0;kk2<1200;kk2++)
for(kk3=0;kk3<1200;kk3++);
}
void keyboardc()//录入课程子函数(从键盘录入)
{
struct couse *p1,*p2;
N1=0;
p1=p2=(struct couse*)malloc(sizeof(struct couse));
printf("课程编号\t课程名称\t学分\t课程人数上限\n");
scanf("%d%s%d%d",&p1->num1,p1->name1,&p1->score,&p1->Melepeo);
p1->nelepeo=0;
head1=NULL;
while(p1->num1!=0)
{
N1=N1+1;
if(N1==1)head1=p1;
else p2->next=p1;
p2=p1;
p1=(struct couse * )malloc(sizeof(struct couse));
scanf("%d%s%d%d",&p1->num1,p1->name1,&p1->score,&p1->Melepeo);
p1->nelepeo=0;
}
p2->next=NULL;
}
void filec()//录入键盘子函数(从文件录入)
{
FILE * fp;
char filepath[20];
struct couse *p1,*p2;
N1=0;
printf("输入要读入的文件路径:");
getchar();
gets(filepath);
if((fp=fopen(filepath,"r"))==NULL)
{
printf("找不到%s文件!\n",filepath);
exit(0);
}
p1=p2=(struct couse*)malloc(sizeof(struct couse));
fscanf(fp,"%d%s%d%d%d",&p1->num1,p1->name1,&p1->score,&p1->nelepeo,&p1->Melepeo);
head1=NULL;
while(!feof(fp))
{
N1=N1+1;
if(N1==1)head1=p1;
else p2->next=p1;
p2=p1;
p1=(struct couse * )malloc(sizeof(struct couse));
fscanf(fp,"%d%s%d%d%d",&p1->num1,p1->name1,&p1->score,&p1->nelepeo,&p1->Melepeo);
}
p2->next=NULL;
}
void inputc()//录入课程主函数
{
int i;
printf("\t\t\t录入课程信息\n");
printf("\n1.从键盘录入\n");
printf("2.从文件录入\n");
printf("3.返回主菜单\n");
printf("请选择(1~3):\n");
scanf("%d",&i);
switch(i)
{
case(1):keyboardc();break;
case(2):filec();break;
case(3):break;
}
}
void insertc(struct couse *incouse)//课程管理子函数(增加课程)
{
struct couse *p0,*p1,*p2;
p1=head1;
p0=incouse;
if(head1==NULL)
{
head1=p0;
p0->next=NULL;
}
else
{
while((p0->num1 > p1->num1) && (p1->next!=NULL))
{
p2=p1;
p1=p1->next;
}
if(p0->num1 <= p1->num1)
{
if(head1==p1) head1=p0;
else p2->next=p0;
p0->next=p1;
}
else
{
p1->next=p0;
p0->next=NULL;
}
}
N1=N1+1;
}
void delc(int num1)//课程管理子函数(删除课程)
{
struct couse *p1,*p2;
if(head1==NULL)
{
printf("\n没有课程,无法删除!\n");
goto end;
}
p1=head1;
while(num1!=p1->num1 && p1->next!=NULL)
{
p2=p1;
p1=p1->next;
}
if(num1==p1->num1)
{
if(p1==head1) head1=p1->next;
else p2->next=p1->next;
printf("已删除该编号课程!\n");
N1=N1-1;
}
else printf("无该编号的课程!\n");
end:;
}
void managementc()//课程管理主函数
{
struct couse * incouse;
int i,num1;
printf("\t\t\t课程管理\n");
printf("1.新增课程\n");
printf("2.删除课程\n");
printf("3.返回主菜单\n");
printf("请选择(1~3):\n");
scanf("%d",&i);
switch(i)
{
case(1):
{
incouse=(struct couse *)malloc(sizeof(struct couse));
printf("课程编号\t课程名称\t学分\t课程人数上限\n");
scanf("%d%s%d%d",&incouse->num1,incouse->name1,&incouse->score,&incouse->Melepeo);
incouse->nelepeo=0;
insertc(incouse);
break;
}
case(2):
{
printf("请输入要删除课程的编号:\n");
scanf("%d",&num1);
delc(num1);
break;
}
case(3):break;
}
}
void keyboards()//录入学生信息子函数（从键盘录入）
{
int i;
struct student *p1,*p2;
N2=0;
p1=p2=(struct student *)malloc(sizeof(struct student));
printf("学生学号\t学生姓名\n");
scanf("%d%s",&p1->num2,p1->name2);
p1->nelen=0;
for(i=0;i<20;i++) p1->nelenum[i]=0;
head2=NULL;
while(p1->num2!=0)
{
N2=N2+1;
if(N2==1)head2=p1;
else p2->next=p1;
p2=p1;
p1=(struct student * )malloc(sizeof(struct student));
scanf("%d%s",&p1->num2,p1->name2);
p1->nelen=0;
for(i=0;i<20;i++) p1->nelenum[i]=0;
}
p2->next=NULL;
}
void files()//录入学生信息子函数（从文件录入）
{
int i=0;
FILE * fp;
char filepath[20];
struct student *p1,*p2;
N2=0;
printf("输入要读入的文件路径:");
getchar();
gets(filepath);
if((fp=fopen(filepath,"r"))==NULL)
{
printf("找不到%s文件!\n",filepath);
exit(0);
}
p1=p2=(struct student*)malloc(sizeof(struct student));
fread(p1,sizeof(struct student),1,fp);
head2=NULL;
while(!feof(fp))
{
i=0;
N2=N2+1;
if(N2==1)head2=p1;
else p2->next=p1;
p2=p1;
p1=(struct student * )malloc(sizeof(struct student));
fread(p1,sizeof(struct student),1,fp);
}
p2->next=NULL;
}
void inputs()//录入学生信息主函数
{
int i;
printf("\t\t\t录入学生信息\n");
printf("\n1.从键盘录入\n");
printf("2.从文件录入\n");
printf("3.返回主菜单\n");
printf("请选择(1~3):\n");
scanf("%d",&i);
switch(i)
{
case(1):keyboards();break;
case(2):files();break;
case(3):break;
}
}
void inserts(struct student * incouse)//学生信息管理子函数(填加学生信息)
{
struct student *p0,*p1,*p2;
p1=head2;
p0=incouse;
if(head2==NULL)
{
head2=p0;
p0->next=NULL;
}
else
{
while((p0->num2 > p1->num2) && (p1->next!=NULL))
{
p2=p1;
p1=p1->next;
}
if(p0->num2 <= p1->num2)
{
if(head2==p1) head2=p0;
else p2->next=p0;
p0->next=p1;
}
else
{
p1->next=p0;
p0->next=NULL;
}
}
N2=N2+1;
}
void dels(int num2)//学生信息管理子函数（删除学生信息)
{
struct student *p1,*p2;
if(head2==NULL)
{
printf("\n没有该学生信息,无法删除!\n");
goto end;
}
p1=head2;
while(num2!=p1->num2 && p1->next!=NULL)
{
p2=p1;
p1=p1->next;
}
if(num2==p1->num2)
{
if(p1==head2) head2=p1->next;
else p2->next=p1->next;
printf("已删除该学生信息!\n");
N2=N2-1;
}
else printf("无该学号的学生!\n");
end:;
}
void managements()//学生信息管理主函数
{
struct student * incouse;
int i,num2;
printf("\t\t\t学生信息管理\n");
printf("1.新增学生信息\n");
printf("2.删除学生信息\n");
printf("3.返回主菜单\n");
printf("请选择(1~3):\n");
scanf("%d",&i);
switch(i)
{
case(1):
{
incouse=(struct student *)malloc(sizeof(struct student));
incouse->nelen=0;
incouse->nelenum[0]=0;
printf("学生学号\t学生姓名\n");
scanf("%d%s",&incouse->num2,incouse->name2);
inserts(incouse);
break;
}
case(2):
{
printf("请输入要删除学生的学号:\n");
scanf("%d",&num2);
dels(num2);
break;
}
case(3):break;
}
}
void elect(struct student * s)//选课
{
struct couse * p;
int num1,i;
printf("请输入要选课的编号:\n");
scanf("%d",&num1);
for(i=0;s->nelenum[i]!=0;i++);
s->nelenum[i]=num1;
(s->nelen)++;
p=head1;
while(p->num1!=num1) p=p->next;
(p->nelepeo)++;
}
void cheak()//学生选课子函数(查询可选课程)
{
char e;
struct couse * c;
struct student * s;
int num2,i,j=0,t=0;
printf("请输入你的学号:");
scanf("%d",&num2);
s=head2;
while(s->num2!=num2 && s->next!=NULL) s=s->next;
if(s->num2!=num2)
{
printf("不存在你的信息,请进入主菜单录入你的信息!\n");
goto end;
}
c=head1;
printf("你的可选课程编号:\n");
while(c!=NULL)
{
for(t=0,i=0;s->nelenum[i]!=0;i++)
{
if(c->num1==s->nelenum[i]) t=1;
}
if(t==0 && (c->nelepeo!=c->Melepeo))
{
printf("%d\n",c->num1);
j++;
}
c=c->next;
}
if(j==0)
{
printf("你已选完所有课程，无法再多选!\n");
goto end;
}
printf("选课(y/n)?:\n");
getchar();
e=getchar();
i=0;
while(e=='y')
{
elect(s);
printf("继续选课(y/n)?:\n");
getchar();
e=getchar();
}
end:;
}
void back(struct student * p)//退课
{
struct couse * p1;
int num1,i,j;
printf("请输入你要退掉的课程编号:\n");
scanf("%d",&num1);
p1=head1;
while(p1->num1!=num1) p1=p1->next;
for(i=0;p->nelenum[i]!=num1;i++);
for(j=i;p->nelenum[j]!=0;j++) p->nelenum[j]=p->nelenum[j+1];
p->nelenum[--j]=0;
(p1->nelepeo)--;
printf("退课成功!\n");
}
void hcheak()//学生选课子函数（查询已选课程)
{
char c;
struct couse * p0;
struct student * p;
int num2,i,f=0;
printf("请输入学号:\n");
scanf("%d",&num2);
p=head2;
while(p->num2!=num2 && p!=NULL) p=p->next;
if(p==NULL)
{
printf("不存在你的信息,请回主菜单录入信息:\n");
goto end;
}
printf("已选课程编号:\n");
if(p->nelenum[0]==0)
{
printf("你还没选课!\n");
goto end;
}
for(i=0;p->nelenum[i]!=0;i++)
{
printf("%d\n",p->nelenum[i]);
p0=head1;
while(p0->num1!=p->nelenum[i]) p0=p0->next;
f=f+p0->score;
}
printf("总学分:%d\n",f);
printf("是否进行退课(y/n)?");
getchar();
c=getchar();
while(c=='y')
{
back(p);
printf("继续退课(y/n)?");
getchar();
c=getchar();
(p->nelen)--;
}
end:;
}
void elective()//学生选课主函数
{
int i;
printf("\t\t\t学生选课\n");
printf("1.查询可选课程\n");
printf("2.查询已选课程\n");
printf("3.返回主菜单\n");
printf("请输入(1~3):\n");
scanf("%d",&i);
switch(i)
{
case(1):cheak();break;
case(2):hcheak();break;
case(3):break;
}
}
void listc()//输出课程信息
{
struct couse * p;
p=head1;
printf("课程编号课程名称学分课程已选人数课程人数上限\n");
while(p!=NULL)
{
printf("%-8d%10s%6d%8d%12d\n",p->num1,p->name1,p->score,p->nelepeo,p->Melepeo);
p=p->next;
}
}
void lists()//输出学生信息
{
struct student * p;
p=head2;
printf("学生学号学生姓名已选课程数量\n");
while(p!=NULL)
{
printf("%-4d %10s %6d\n",p->num2,p->name2,p->nelen);
p=p->next;
}
}
void intoc()//存储课程信息
{
FILE * fp;
struct couse * p;
char filepath[30];
printf("输入课程信息要保存的文件路径:");
getchar();
gets(filepath);
if((fp=fopen(filepath,"w"))==NULL)
{
printf("\n保存失败!");
exit(0);
}
p=head1;
while(p!=NULL)
{
fprintf(fp,"%d %s %d %d %d\n",p->num1,p->name1,p->score,p->nelepeo,p->Melepeo);
p=p->next;
}
fclose(fp);
printf("课程信息已保存在%s中!\n",filepath);
}
void intos()//存储学生信息
{
FILE * fp;
struct student * p;
char filepath[30];
printf("输入学生信息要保存的文件路径:");
getchar();
gets(filepath);
if((fp=fopen(filepath,"w"))==NULL)
{
printf("\n保存失败!");
exit(0);
}
p=head2;
while(p!=NULL)
{
fwrite(p,sizeof(struct student),1,fp);
p=p->next;
}
fclose(fp);
printf("学生信息已保存在%s中!\n",filepath);
}
void into()//存储信息
{
int i;
printf("1.存储课程信息\n");
printf("2.存储学生信息\n");
printf("3.返回主菜单\n");
printf("请输入(1~3)\n");
scanf("%d",&i);
switch(i)
{
case(1):intoc();break;
case(2):intos();break;
case(3):break;
}
}
void store()//信息主函数
{
int i;
printf("\t\t系统信息查看及存储\n");
printf("1.查看课程信息\n");
printf("2.查看学生信息\n");
printf("3.存储信息\n");
printf("4.返回主菜单\n");
printf("请输入(1~4):\n");
scanf("%d",&i);
switch(i)
{
case(1):listc();break;
case(2):lists();break;
case(3):into();break;
case(4):break;
}
}
int main()//主函数
{
int i;
start:
printf("\n\t\t\t欢迎使用学生选课系统!\n");
printf("菜单:\n");
printf("1.录入课程信息\n");
printf("2.课程管理\n");
printf("3.录入学生信息\n");
printf("4.学生信息管理\n");
printf("5.学生选课\n");
printf("6.系统信息查看及存储\n");
printf("7.退出系统\n");
printf("\n请输入菜单选项(1~7):\n");
scanf("%d",&i);
if(i<1 || i>7)
{
printf("输入错误,请重输:\n");
goto start;
}
switch(i)
{
case(1):
{
system("cls");
inputc();
goto start;
break;
}
case(2):
{
system("cls");
managementc();
goto start;
break;
}
case(3):
{
system("cls");
inputs();
goto start;
break;
}
case(4):
{
system("cls");
managements();
goto start;
break;
}
case(5):
{
system("cls");
elective();
goto start;
break;
}
case(6):
{
system("cls");
store();
goto start;
break;
}
case(7):
{
system("cls");
printf("感谢使用本系统!\n\n再见!\n");
}
}
return(0);
}

6. C语言学生选修课系统

//7《学生选修课程系统》设计任务
//（1）输入功能：输入30名学生学号、班级、姓名、选修课名称。
//（2）设置要求：每个学生至少选修3科，总选修科目至少设置15科。
//（3）查询功能：按学号、姓名、选修课显示各选修课上课时间和地点。

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<malloc.h>
typedef struct subjects
{
int num;
char na[10];
char teacher[20];
char wtime[10];
char ttime[10];
int score;
struct subjects *next;
}SUB;
SUB *create_form()
{
SUB *head,*tail,*p;
int num,score;
char na[10],teacher[20],wtime[10],ttime[10];
head=tail=NULL;
printf(" 输入选课程信息，以6个0结束：\n");
printf(" 课程代码课名任教老师上课星期上课时间学分\n");
scanf("%d%10s%14s%10s%8s%6d",&num,&na,&teacher,&wtime,&ttime,&score);
while(num!=0)
{
p=(SUB*)malloc(sizeof(SUB));
p->num;
strcpy(p->na,na);
strcpy(p->teacher,teacher);
strcpy(p->wtime,wtime);
strcpy(p->ttime,ttime);
p->score=score;
if(head==NULL)
head=p;
else
tail->next=p;
tail=p;
scanf("%d%s%s%s%s%d",&num,&na,&teacher,&wtime,&ttime,&score);
}
tail->next=NULL;
return head;
}
void savefile(SUB*head)
{
SUB *p;
FILE *fp;
fp=fopen("subjects.txt","w");
fprintf(fp,"欢迎进入东华理工大学2008-2009学年选修课系统（4-13）\n");
fprintf(fp,"课程代码课名任教老师上课星期上课时间学分\n");
for(p=head;p;p->next)
fprintf(fp,"%6d%10s%14s%10s%8s%6d",p->num,p->na,p->teacher,p->wtime,p->ttime,p->score);
fclose(fp);
}
void prin(SUB *head)
{
SUB *p;
if (head==NULL)
{
printf("没有选修课程记录！\n");
return;
}
printf("欢迎进入东华理工大学2008-2009学年选修课系统（4-13）\n");
printf("课程代码课名任教老师上课星期上课时间学分\n");
for(p=head;p;p->next)
printf("%6d%10s%16s%12s%12s%d",p->num,p->na,p->teacher,p->wtime,p->ttime,p->score);
}
SUB *inset(SUB *head)
{
SUB *ptr,*ptr2,*subj;
char ch, ch1;
printf("是否进行插入课程，如果需要插入请按回车建，不进行按空格结束！\n");
ch=getchar();
while(ch!=' '){
subj=(SUB*)malloc(sizeof(SUB));
ptr=subj;
printf(" 输入要插入的课程信息：\n");
scanf("%d%s%s%s%s%d",subj->num,subj->na,subj->teacher,subj->wtime,subj->ttime,subj->score);
if(head==NULL){
head=ptr;
head->next=NULL;
}
else{
for(ptr2=head;ptr2;ptr2=ptr2->next)
if(ptr2->next==NULL){
ptr2->next=subj;
subj->next=NULL;
break;
}
ch='a';
}
printf("继续请按回车建，结束请按空格：\n");
ch1=getchar();
ch=getchar();
}
return head;
}
SUB *del(SUB *head)
{
SUB*p1,*p2;
char ch,ch1;
int num;
printf("是否进行课程删除，要删除请按回车键，不进行请按空格：\n");
ch=getchar();
while(ch!=' ')
{
printf("输入要删除的课程代码：\n");
scanf("%d",&num);
if(head->num==num){
p2=head;
head=head->next;
free(p2);
}
if(head==NULL)
return NULL;
p1=head;
p2=head->next;
while(p2!=NULL){
if(p2->num==num){
p1->next=p2->next;
free(p2);
}
else
p1=p2;
p2=p1->next;
}
printf("继续删除请按回车键，结束请按空格：\n");
ch1=getchar();
ch=getchar();
}
return head;
}
typedef struct student
{
int number;
int classes;
char chinesename[16];
char title [5][12];
struct student *other;
}STU;
void scanf_form(SUB *head)
{
int i,count,number,classes;
char ch,title[3][12],chinesename[16];
scanf("%d%d%16s",&number,&classes,&chinesename);
for(i=0;i<5;i++)
{
scanf("%s",&title[i]);
count++;
if(count==3)
{
ch=getchar();
if(ch!=' ')
{title[3][12]='0';
title[4][12]='0';
i=5;
ch='a';
}
}
if(count==4)
{
ch=getchar();
if(ch!=' ')
{title[4][12]='0';
i=5;
ch='a';
}
}
for(i=0;i<5;i++)
{
if(strcmp(title[i][12],head->na)!=0 && title[i][12]!='0')
{ printf("你输入的课程名不正确，请从新输入：\n");
scanf_form();
}
}
}
}
STU *study_form(SUB*head)
{
STU *hand,*tall,*q;
int i;
char ch,ch1;
hand=tall=NULL;
printf("输入你个人信息，及选修的课名，以4个0结束：\n");
printf("注：每个学生至少选修3门课，大于3门时按回车键继续，空格结束：\n");
scanf_form();
while(number!=0)
{
q=(STU*)malloc(sizeof(STU));
q->number=number;
q->classes=classes;
strcpy(p->chinesename,chinesename);
for(i=0;i<5;i++)
strcpy(p->title[i],title[i][12]);
if(hand=NULL)
hand=q;
else
tall->other=q;
tall=q;
scanf_form();
for(i=0;i<5;i++)
{
if(strcmp(title[i][12],head->na)!=0&&titli[i][12]!='0')
{ printf("你输入的课程名不正确，请从新输入：\n");
scanf_form();
}
}
tall->other=NULL;
return hand;
}
}
void savefiles(STU*hand)
{
STU *q;
FILE *fq;
fq=fopen("studennt.txt","w");
fprintf(fq, "学生选课信息表：\n");
for(q=hand;q;q=q->other)
fprintf(fq,"%16d%10d%16s%16s%16s%16s%16s%16s",q->number,q->classes,q->chinesename,q->title[0],q->title[1],q->title[2],q->title[3],q->title[4]);
fclose(fq);
}
void prins(STU*hand)
{
STU *q;
if(head==NULL)
{
printf("没有学生选课信息记录！\n");
return;
}
printf("学生选课信息一览表：\n");
printf("学号班级姓名课名：\n");
for(q=hand;q;q->number)
printf("%16d%10d%16s%16s%16s%16s%16s%16s",q->number,q->classes,q->chinesename,q->title[0],q->title[1],q->title[2],q->title[3],q->title[4]);
}
STU *intserts(SUB*head,STU *hand)
{
STU *prt,*prt2,*stuj;
int i;
char ch,ch1;
printf("是否要进行插入学生选课信息，如果需要请按回车建，结束请按0：\n");
ch=getchar();
while(ch!=' ')
{
stuj=(STU*)malloc(sizeof(STU));
prt=stuj;
printf("输入要插入的学生选课信息：\n");
scanf_form();
if(hand==NULL)
{hand=prt;
hand->other=NULL;
}
else
{for(prt2=hand;prt2;prt2=prt2->other)
if(prt2->other==NULL)
{prt2->other=stuj;
stuj->other=NULL;
break;
}
ch='a';
}
printf("继续插入请按回车建，结束请按空格：\n");
ch1=getchar();
ch=getchar();
}
return hand;
}
STU *dells(STU *hand)
{
STU *q1,*q2;
char ch,ch1;
int number;
printf("是否进行学生选课信息删除，要删除请按回车建，不进行请按空格：\n");
ch=getchar();
while(ch!=' ')
{
printf("输入要删除的学号：\n");
scanf("%d",&number);
if(hand->number==number)
{
q2=hand;
hand=hand->other;
free(q2);
}
if(hand=NULL)
return NULL;
q1=hand;
q2=hand->other;
while(q2)
{if(q2->number==number)
{q1->other=q2->other;
free(q2);
}
else
q1=q2;
q2=q1->other;
}
printf("继续删除请按回车建，结束请按空格：\n");
ch1=getchar();
ch1=getchar();
}
return hand;
}
void search(STU*hand)
{
int a,number;
int t=1;
char type[10],ch,ch1;
STU *prt;
printf("是否进入查询，按回车键进入，空格结束:\n");
ch=getchar();
while(ch!=' ')
{
printf("请输入要查询的学号：\n");
for(prt=hand;prt;prt=prt->other)
{
if(number=prt->number)
{printf("%16d%10d%16s%16s%16s%16s%16s%16s",prt->number,prt->classes,prt->chinesename,prt->title[0],prt->title[1],prt->title[2],prt->title[3],prt->title[4]);
t=0;
}
if(t!=0)
printf("未找到！\n");
t=1;
}
printf("继续查找请按回车键，结束请按空格键：\n");
ch1=getchar();
ch=getchar();
}
}
void main()
{
SUB *head=create_form() ;
savefile(head);
prin(head);
head= inset(head);
head= del(head);
STU *hand=study_form(head);
savefiles(hand);
prins(hand);
hand=intserts(head,hand);
hand=dells(hand);
search(hand);
}

7. 用C语言写一个学生选课系统

#include<stdio.h>
#include<stdlib.h>
int N1,N2,kk1,kk2,kk3;
struct couse * head1;
struct student * head2;
struct couse//课程信息结构体
{
int num1;
char name1[20];
int score;
int nelepeo;//课程已选人数
int Melepeo;//课程人数上限
struct couse * next;
};
struct student//学生信息结构体
{
int num2;
char name2[20];
int nelenum[50];//已选课程编号
int nelen;//已选课程数量
struct student * next;
};
void Ms()
{
for(kk1=0;kk1<1100;kk1++)
for(kk2=0;kk2<1200;kk2++)
for(kk3=0;kk3<1200;kk3++);
}
void keyboardc()//录入课程子函数(从键盘录入)
{
struct couse *p1,*p2;
N1=0;
p1=p2=(struct couse*)malloc(sizeof(struct couse));
printf("课程编号\t课程名称\t学分\t课程人数上限\n");
scanf("%d%s%d%d",&p1->num1,p1->name1,&p1->score,&p1->Melepeo);
p1->nelepeo=0;
head1=NULL;
while(p1->num1!=0)
{
N1=N1+1;
if(N1==1)head1=p1;
else p2->next=p1;
p2=p1;
p1=(struct couse * )malloc(sizeof(struct couse));
scanf("%d%s%d%d",&p1->num1,p1->name1,&p1->score,&p1->Melepeo);
p1->nelepeo=0;
}
p2->next=NULL;
}
void filec()//录入键盘子函数(从文件录入)
{
FILE * fp;
char filepath[20];
struct couse *p1,*p2;
N1=0;
printf("输入要读入的文件路径:");
getchar();
gets(filepath);
if((fp=fopen(filepath,"r"))==NULL)
{
printf("找不到%s文件!\n",filepath);
exit(0);
}
p1=p2=(struct couse*)malloc(sizeof(struct couse));
fscanf(fp,"%d%s%d%d%d",&p1->num1,p1->name1,&p1->score,&p1->nelepeo,&p1->Melepeo);
head1=NULL;
while(!feof(fp))
{
N1=N1+1;
if(N1==1)head1=p1;
else p2->next=p1;
p2=p1;
p1=(struct couse * )malloc(sizeof(struct couse));
fscanf(fp,"%d%s%d%d%d",&p1->num1,p1->name1,&p1->score,&p1->nelepeo,&p1->Melepeo);
}
p2->next=NULL;
}
void inputc()//录入课程主函数
{
int i;
printf("\t\t\t录入课程信息\n");
printf("\n1.从键盘录入\n");
printf("2.从文件录入\n");
printf("3.返回主菜单\n");
printf("请选择(1~3):\n");
scanf("%d",&i);
switch(i)
{
case(1):keyboardc();break;
case(2):filec();break;
case(3):break;
}
}
void insertc(struct couse *incouse)//课程管理子函数(增加课程)
{
struct couse *p0,*p1,*p2;
p1=head1;
p0=incouse;
if(head1==NULL)
{
head1=p0;
p0->next=NULL;
}
else
{
while((p0->num1 > p1->num1) && (p1->next!=NULL))
{
p2=p1;
p1=p1->next;
}
if(p0->num1 <= p1->num1)
{
if(head1==p1) head1=p0;
else p2->next=p0;
p0->next=p1;
}
else
{
p1->next=p0;
p0->next=NULL;
}
}
N1=N1+1;
}
void delc(int num1)//课程管理子函数(删除课程)
{
struct couse *p1,*p2;
if(head1==NULL)
{
printf("\n没有课程,无法删除!\n");
goto end;
}
p1=head1;
while(num1!=p1->num1 && p1->next!=NULL)
{
p2=p1;
p1=p1->next;
}
if(num1==p1->num1)
{
if(p1==head1) head1=p1->next;
else p2->next=p1->next;
printf("已删除该编号课程!\n");
N1=N1-1;
}
else printf("无该编号的课程!\n");
end:;
}
void managementc()//课程管理主函数
{
struct couse * incouse;
int i,num1;
printf("\t\t\t课程管理\n");
printf("1.新增课程\n");
printf("2.删除课程\n");
printf("3.返回主菜单\n");
printf("请选择(1~3):\n");
scanf("%d",&i);
switch(i)
{
case(1):
{
incouse=(struct couse *)malloc(sizeof(struct couse));
printf("课程编号\t课程名称\t学分\t课程人数上限\n");
scanf("%d%s%d%d",&incouse->num1,incouse->name1,&incouse->score,&incouse->Melepeo);
incouse->nelepeo=0;
insertc(incouse);
break;
}
case(2):
{
printf("请输入要删除课程的编号:\n");
scanf("%d",&num1);
delc(num1);
break;
}
case(3):break;
}
}
void keyboards()//录入学生信息子函数（从键盘录入）
{
int i;
struct student *p1,*p2;
N2=0;
p1=p2=(struct student *)malloc(sizeof(struct student));
printf("学生学号\t学生姓名\n");
scanf("%d%s",&p1->num2,p1->name2);
p1->nelen=0;
for(i=0;i<20;i++) p1->nelenum[i]=0;
head2=NULL;
while(p1->num2!=0)
{
N2=N2+1;
if(N2==1)head2=p1;
else p2->next=p1;
p2=p1;
p1=(struct student * )malloc(sizeof(struct student));
scanf("%d%s",&p1->num2,p1->name2);
p1->nelen=0;
for(i=0;i<20;i++) p1->nelenum[i]=0;
}
p2->next=NULL;
}
void files()//录入学生信息子函数（从文件录入）
{
int i=0;
FILE * fp;
char filepath[20];
struct student *p1,*p2;
N2=0;
printf("输入要读入的文件路径:");
getchar();
gets(filepath);
if((fp=fopen(filepath,"r"))==NULL)
{
printf("找不到%s文件!\n",filepath);
exit(0);
}
p1=p2=(struct student*)malloc(sizeof(struct student));
fread(p1,sizeof(struct student),1,fp);
head2=NULL;
while(!feof(fp))
{
i=0;
N2=N2+1;
if(N2==1)head2=p1;
else p2->next=p1;
p2=p1;
p1=(struct student * )malloc(sizeof(struct student));
fread(p1,sizeof(struct student),1,fp);
}
p2->next=NULL;
}
void inputs()//录入学生信息主函数
{
int i;
printf("\t\t\t录入学生信息\n");
printf("\n1.从键盘录入\n");
printf("2.从文件录入\n");
printf("3.返回主菜单\n");
printf("请选择(1~3):\n");
scanf("%d",&i);
switch(i)
{
case(1):keyboards();break;
case(2):files();break;
case(3):break;
}
}
void inserts(struct student * incouse)//学生信息管理子函数(填加学生信息)
{
struct student *p0,*p1,*p2;
p1=head2;
p0=incouse;
if(head2==NULL)
{
head2=p0;
p0->next=NULL;
}
else
{
while((p0->num2 > p1->num2) && (p1->next!=NULL))
{
p2=p1;
p1=p1->next;
}
if(p0->num2 <= p1->num2)
{
if(head2==p1) head2=p0;
else p2->next=p0;
p0->next=p1;
}
else
{
p1->next=p0;
p0->next=NULL;
}
}
N2=N2+1;
}
void dels(int num2)//学生信息管理子函数（删除学生信息)
{
struct student *p1,*p2;
if(head2==NULL)
{
printf("\n没有该学生信息,无法删除!\n");
goto end;
}
p1=head2;
while(num2!=p1->num2 && p1->next!=NULL)
{
p2=p1;
p1=p1->next;
}
if(num2==p1->num2)
{
if(p1==head2) head2=p1->next;
else p2->next=p1->next;
printf("已删除该学生信息!\n");
N2=N2-1;
}
else printf("无该学号的学生!\n");
end:;
}
void managements()//学生信息管理主函数
{
struct student * incouse;
int i,num2;
printf("\t\t\t学生信息管理\n");
printf("1.新增学生信息\n");
printf("2.删除学生信息\n");
printf("3.返回主菜单\n");
printf("请选择(1~3):\n");
scanf("%d",&i);
switch(i)
{
case(1):
{
incouse=(struct student *)malloc(sizeof(struct student));
incouse->nelen=0;
incouse->nelenum[0]=0;
printf("学生学号\t学生姓名\n");
scanf("%d%s",&incouse->num2,incouse->name2);
inserts(incouse);
break;
}
case(2):
{
printf("请输入要删除学生的学号:\n");
scanf("%d",&num2);
dels(num2);
break;
}
case(3):break;
}
}
void elect(struct student * s)//选课
{
struct couse * p;
int num1,i;
printf("请输入要选课的编号:\n");
scanf("%d",&num1);
for(i=0;s->nelenum[i]!=0;i++);
s->nelenum[i]=num1;
(s->nelen)++;
p=head1;
while(p->num1!=num1) p=p->next;
(p->nelepeo)++;
}
void cheak()//学生选课子函数(查询可选课程)
{
char e;
struct couse * c;
struct student * s;
int num2,i,j=0,t=0;
printf("请输入你的学号:");
scanf("%d",&num2);
s=head2;
while(s->num2!=num2 && s->next!=NULL) s=s->next;
if(s->num2!=num2)
{
printf("不存在你的信息,请进入主菜单录入你的信息!\n");
goto end;
}
c=head1;
printf("你的可选课程编号:\n");
while(c!=NULL)
{
for(t=0,i=0;s->nelenum[i]!=0;i++)
{
if(c->num1==s->nelenum[i]) t=1;
}
if(t==0 && (c->nelepeo!=c->Melepeo))
{
printf("%d\n",c->num1);
j++;
}
c=c->next;
}
if(j==0)
{
printf("你已选完所有课程，无法再多选!\n");
goto end;
}
printf("选课(y/n)?:\n");
getchar();
e=getchar();
i=0;
while(e=='y')
{
elect(s);
printf("继续选课(y/n)?:\n");
getchar();
e=getchar();
}
end:;
}
void back(struct student * p)//退课
{
struct couse * p1;
int num1,i,j;
printf("请输入你要退掉的课程编号:\n");
scanf("%d",&num1);
p1=head1;
while(p1->num1!=num1) p1=p1->next;
for(i=0;p->nelenum[i]!=num1;i++);
for(j=i;p->nelenum[j]!=0;j++) p->nelenum[j]=p->nelenum[j+1];
p->nelenum[--j]=0;
(p1->nelepeo)--;
printf("退课成功!\n");
}
void hcheak()//学生选课子函数（查询已选课程)
{
char c;
struct couse * p0;
struct student * p;
int num2,i,f=0;
printf("请输入学号:\n");
scanf("%d",&num2);
p=head2;
while(p->num2!=num2 && p!=NULL) p=p->next;
if(p==NULL)
{
printf("不存在你的信息,请回主菜单录入信息:\n");
goto end;
}
printf("已选课程编号:\n");
if(p->nelenum[0]==0)
{
printf("你还没选课!\n");
goto end;
}
for(i=0;p->nelenum[i]!=0;i++)
{
printf("%d\n",p->nelenum[i]);
p0=head1;
while(p0->num1!=p->nelenum[i]) p0=p0->next;
f=f+p0->score;
}
printf("总学分:%d\n",f);
printf("是否进行退课(y/n)?");
getchar();
c=getchar();
while(c=='y')
{
back(p);
printf("继续退课(y/n)?");
getchar();
c=getchar();
(p->nelen)--;
}
end:;
}
void elective()//学生选课主函数
{
int i;
printf("\t\t\t学生选课\n");
printf("1.查询可选课程\n");
printf("2.查询已选课程\n");
printf("3.返回主菜单\n");
printf("请输入(1~3):\n");
scanf("%d",&i);
switch(i)
{
case(1):cheak();break;
case(2):hcheak();break;
case(3):break;
}
}
void listc()//输出课程信息
{
struct couse * p;
p=head1;
printf("课程编号课程名称学分课程已选人数课程人数上限\n");
while(p!=NULL)
{
printf("%-8d%10s%6d%8d%12d\n",p->num1,p->name1,p->score,p->nelepeo,p->Melepeo);
p=p->next;
}
}
void lists()//输出学生信息
{
struct student * p;
p=head2;
printf("学生学号学生姓名已选课程数量\n");
while(p!=NULL)
{
printf("%-4d %10s %6d\n",p->num2,p->name2,p->nelen);
p=p->next;
}
}
void intoc()//存储课程信息
{
FILE * fp;
struct couse * p;
char filepath[30];
printf("输入课程信息要保存的文件路径:");
getchar();
gets(filepath);
if((fp=fopen(filepath,"w"))==NULL)
{
printf("\n保存失败!");
exit(0);
}
p=head1;
while(p!=NULL)
{
fprintf(fp,"%d %s %d %d %d\n",p->num1,p->name1,p->score,p->nelepeo,p->Melepeo);
p=p->next;
}
fclose(fp);
printf("课程信息已保存在%s中!\n",filepath);
}
void intos()//存储学生信息
{
FILE * fp;
struct student * p;
char filepath[30];
printf("输入学生信息要保存的文件路径:");
getchar();
gets(filepath);
if((fp=fopen(filepath,"w"))==NULL)
{
printf("\n保存失败!");
exit(0);
}
p=head2;
while(p!=NULL)
{
fwrite(p,sizeof(struct student),1,fp);
p=p->next;
}
fclose(fp);
printf("学生信息已保存在%s中!\n",filepath);
}
void into()//存储信息
{
int i;
printf("1.存储课程信息\n");
printf("2.存储学生信息\n");
printf("3.返回主菜单\n");
printf("请输入(1~3)\n");
scanf("%d",&i);
switch(i)
{
case(1):intoc();break;
case(2):intos();break;
case(3):break;
}
}
void store()//信息主函数
{
int i;
printf("\t\t系统信息查看及存储\n");
printf("1.查看课程信息\n");
printf("2.查看学生信息\n");
printf("3.存储信息\n");
printf("4.返回主菜单\n");
printf("请输入(1~4):\n");
scanf("%d",&i);
switch(i)
{
case(1):listc();break;
case(2):lists();break;
case(3):into();break;
case(4):break;
}
}
int main()//主函数
{
int i;
start:
printf("\n\t\t\t欢迎使用学生选课系统!\n");
printf("菜单:\n");
printf("1.录入课程信息\n");
printf("2.课程管理\n");
printf("3.录入学生信息\n");
printf("4.学生信息管理\n");
printf("5.学生选课\n");
printf("6.系统信息查看及存储\n");
printf("7.退出系统\n");
printf("\n请输入菜单选项(1~7):\n");
scanf("%d",&i);
if(i<1 || i>7)
{
printf("输入错误,请重输:\n");
goto start;
}
switch(i)
{
case(1):
{
system("cls");
inputc();
goto start;
break;
}
case(2):
{
system("cls");
managementc();
goto start;
break;
}
case(3):
{
system("cls");
inputs();
goto start;
break;
}
case(4):
{
system("cls");
managements();
goto start;
break;
}
case(5):
{
system("cls");
elective();
goto start;
break;
}
case(6):
{
system("cls");
store();
goto start;
break;
}
case(7):
{
system("cls");
printf("感谢使用本系统!\n\n再见!\n");
}
}
return(0);
}

8. 用数据结构（c语言版）编写的学生选课系统

9. 怎样用c语言做一个学生选课系统

：= =其实比较简单,用c++,java,c#都可以做,就是用面向对象方法的编程语言就可以了.数据库可以选用SQL.看一下书很快就可以做出来了,这个是很简单的程序的

c语言学生选修课程系统

与c语言学生选修课程系统相关的内容