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);
}