#include<stdio.h>
#include<stdlib.h>
#include <string.h>
struct course//先定义两个结构体^_^,一个是课程信息，另外一个是学生选课的结构图。 
{
int num;//课程编号 
char name[20];//课程名称 
char kind[10];//课程性质 
int time;//总学时 
int ttime;//授课学时 
int etime;//实验上级学时 
int mark;//学分 
int term;//学期 
};
struct student
{
int snum;//学号 
int cnum;//课程编号 
char cname[20];//课程名称
};
void insert()//课程信息录入
{
int mai_n(); 
FILE *fp;
struct course c;
int count;
int i;
if((fp=fopen("course.txt","a+"))==NULL)
{
printf("cannot open file\n");
}
printf("\n 请输入课程门数:\n");
scanf("%d",&count);
printf("课程编号 课程名称 课程性质(公共课/必修课) 总学时 授课学时 实验或上机学时 学分 开课学期(年份):\n");
for(i=0;i<count;i++)
{
scanf("%d %s %s %d %d %d %d %d",&c.num,&c.name,&c.kind,&c.time,&c.ttime,&c.etime,&c.mark,&c.term);
fprintf(fp,"%d %s %s %d %d %d %d %d\n",c.num,c.name,c.kind,c.time,c.ttime,c.etime,c.mark,c.term);
}
fclose(fp);
printf("已保存！");
system("pause");
system("cls");//清屏
mai_n();
}
void browser()//课程信息浏览
{
int mai_n();
FILE *fp;
struct course c;
int a;
if((fp=fopen("course.txt","r"))==NULL)
{
printf("\nCannot open course!\n");
}
printf("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(;!feof(fp);)
{
fscanf(fp,"%d %s %s %d %d %d %d %d\n",&c.num,&c.name,&c.kind,&c.time,&c.ttime,&c.etime,&c.mark,&c.term);
printf("%5d%12s%9s%9d%9d%11d%11d%11d\n",c.num,c.name,c.kind,c.time,c.ttime,c.etime,c.mark,c.term);
}
fclose(fp);
printf("\n1-返回菜单；2-退出系统\n");
scanf("%d",&a);system("cls");//清屏
if(a==1)
mai_n();
else
exit(0);
}
void search()//课程信息查询
{
int mai_n();
FILE *fp;
struct course c;
int xuefen,time;
char kind[10];
int a,b;
printf("1.按学分查询./   /2.按课程性质查询./    /3.按开课学期查询\n");
printf("请选择查询方式，输入选项数字：   ");
scanf("%d",&b);
if(b==1)
{
printf("\n 请输入要查询的学分:\n");
scanf("%d",&xuefen);
if((fp=fopen("course.txt","r"))==NULL)
{
printf("\nCannot open course!\n");
}
printf("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(;!feof(fp);)//文件到结尾前运行 
{fscanf(fp,"%d%s%s%d%d%d%d%d\n",&c.num,&c.name,&c.kind,&c.time,&c.ttime,&c.etime,&c.mark,&c.term);
if(c.mark==xuefen)
printf("%5d%12s%9s%9d%9d%11d%11d%11d\n",c.num,c.name,c.kind,c.time,c.ttime,c.etime,c.mark,c.term);
}
}
else if(b==2){
printf("\n 请输入要查询的课程性质:\n");
scanf("%s",&kind);
if((fp=fopen("course.txt","r"))==NULL)
{
printf("\nCannot open course!\n");
}
printf("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(;!feof(fp);)
{
fscanf(fp,"%d%s%s%d%d%d%d%d\n",&c.num,&c.name,&c.kind,&c.time,&c.ttime,&c.etime,&c.mark,&c.term);
if(strcmp(c.kind,kind)==0)
printf("%5d%12s%9s%9d%9d%11d%11d%11d\n",c.num,c.name,c.kind,c.time,c.ttime,c.etime,c.mark,c.term);
}
}
else if(b==3){
printf("\n 请输入要查询的课程开课学期；\n");
scanf("%d",&time);
if((fp=fopen("course.txt","r"))==NULL)
{
printf("\nCannot open course!\n");
}
printf("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(;!feof(fp);)
{fscanf(fp,"%d%s%s%d%d%d%d%d\n",&c.num,&c.name,&c.kind,&c.time,&c.ttime,&c.etime,&c.mark,&c.term);
if(c.term==time)
printf("%5d%12s%9s%9d%9d%11d%11d%11d\n",c.num,c.name,c.kind,c.time,c.ttime,c.etime,c.mark,c.term);
}
}
else{
printf("输入错误！");
exit(1);
}
fclose(fp);
printf("\n1-返回菜单；2-退出系统\n");
scanf("%d",&a);system("cls");//清屏
if(a==1)
mai_n();
else
exit(0);
}
void xuanke_information()//统计选课情况
{
int mai_n();
int total=0;
int a;
FILE *fp;
struct student s;
if((fp=fopen("student.txt","r"))==NULL)//文件没有内容报错 
{
printf("\nCannot open student!\n");
}
printf(" 学号 课程编号 课程名称\n");
for(;!feof(fp);)
{fscanf(fp,"%d%d%s\n",&s.snum,&s.cnum,&s.cname);
total++;
printf("%7d%9d%13s\n",s.snum,s.cnum,s.cname);
}
printf("\n 选课学生总人数为：%d 人",total);
fclose(fp);
printf("\n1-返回菜单；2-退出系统\n");
scanf("%d",&a);system("cls");//清屏
if(a==1)
mai_n();
else
exit(0);
}
void xuan_ke()//学生选修课程
{
int mai_n();
struct student s;
struct course c;
int a;
FILE *fp;
if((fp=fopen("course.txt","r"))==NULL)//文件没有内容报错
{
printf("\nCannot open course!\n");
}
printf("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(;!feof(fp);)
{
fscanf(fp,"%d %s %s %d %d %d %d %d\n",&c.num,&c.name,&c.kind,&c.time,&c.ttime,&c.etime,&c.mark,&c.term);
printf("%5d%12s%9s%9d%9d%11d%11d%11d\n",c.num,c.name,c.kind,c.time,c.ttime,c.etime,c.mark,c.term);
}
fclose(fp);
printf("*@********#*******************************&****^**^*****&********************************#*****@**\n");
printf("\n 请输入您的学号     及    您要选择的课程编号:\n");
scanf("%d%d",&s.snum,&s.cnum);
if((fp=fopen("course.txt","r"))==NULL)
{
printf("\nCannot open course!\n");
}
for(;!feof(fp);)
{
fscanf(fp,"%d %s %s %d %d %d %d %d\n",&c.num,&c.name,&c.kind,&c.time,&c.ttime,&c.etime,&c.mark,&c.term);
if(s.cnum==c.num)
break;
}
fclose(fp);
if((fp=fopen("student.txt","a+"))==NULL)
{
printf("\nCannot open student!\n");
}
fprintf(fp,"%d %d %s\n",s.snum,s.cnum,c.name);
fclose(fp);
printf("\n1-返回菜单；2-退出系统\n");
scanf("%d",&a);system("cls");//清屏
if(a==1)
mai_n();
else
exit(0);
}
void mai_n()//主菜单 
{
int n,w=0;
printf("               ********************************************************************************\n");
printf("               **                              MENU                                          **\n");
printf("               ********************************************************************************\n");
printf("               **          *        @$    1- 输 入 课 程 信 息^_^            *               **\n");
printf("               **          *        @$    2- 浏 览 课 程 信 息^_^            *               **\n");
printf("               **          *        @$    3- 查 询 课 程 信 息^_^            *               **\n");
printf("               **          *        @$    4- 统 计 选 课 情 况^_^            *               **\n");
printf("               **          *        @$    5- 进 入 选 课 操 作^_^            *               **\n");
printf("               **          *        @$    0- 退 出 选 课 系 统^_^            *               **\n");
printf("               ********************************************************************************\n");
printf(" 请选择（1-5）:");
scanf("%d",&n);
do
{
if(n>5||n<0)
{
printf("\n 输入错误！请重新输入！\n");
scanf("%d",&n);
}
else w=1;
}while(w==0);
switch(n)
{
case 1:insert();break;
case 2:browser();break;
case 3:search();break;
case 4:xuanke_information();break;
case 5:xuan_ke();break; 
case 0:
printf("\n^_^ ^_^ ^_^ ^_^ ^_^ ^_^ ^_^ ^_^ ^_^ ^_^ ^_^ ^_^ ^_^ ^_^ ^_^ ^_^\n\n                              感谢您的使用~~~~~通信工程1803--制作人；石皓华&&王越。"),system("pause"),exit(0);
}
}
int main(void)//登录界面 
{
	int  a,b,c=123,d=123;
	printf("请输入本程序防盗安全账号密码登录系统(防盗安全账号、密码为123)；\n"); //虽然没啥用 
	printf("账号；");
	scanf("%d",&a);
	printf("\n");
	printf("密码；");
	scanf("%d",&b);
	printf("\n");
	while(a!=c)
	{
		printf("账号错误！请重新输入！\n账号；");
		scanf("%d",&a);
	}
	while(b!=d)
	{
		printf("密码错误！请重新输入！\n密码；"); 
		scanf("%d",&b) ;
	 } 
printf("登录成功^_^\n");
system("cls");//清屏
mai_n();//主菜单 
return 0;
}