每次程序运行到这一部都会卡住没反应，估计是tcount部分的代码有问题，望高手指点

Question

#include
#include
#include
#include
#include "head.h"
void tcount(cour *head);
void mcount(cour *head);

void count(cour *head)
{
int i;
while(1)
{
printf("\t\t请选择下一步操作：\n");
printf("\t\t1.按课程性质统计课程门数\n");
printf("\t\t2.找出学分大于等于3分的课程，并输出他们的信息\n");
printf("\t\t0.返回主菜单\n");
i=getch();
switch(i-48)
{
case 1:tcount(head);break;
case 2:mcount(head);break;
case 0:return;
default:printf("\n按键错误，请重新选择！\n");
}
}
return;
}
void tcount(cour *head)
{
cour *cur;
int sum1=0,sum2=0;
cur=head;
while(cur!=NULL)
{
while(strcmp(cur->ctype,"xx")==0)
{
sum1++;
}
while(strcmp(cur->ctype,"bx")==0)
{
sum2++;
}
cur=cur->next;
}
printf("查询结果如下\n");
printf("其中有选修课:%d门\n",sum1);
printf("其中有必修课:%d门\n",sum2);
}
void mcount(cour *head)
{
cour *cur;
cur=head;
printf("学分大于等于3的课程信息如下所示：\n");
printf("%-10s%-10s%-10s%-6s", "课程编号", "课程名称", "课程性质","学时");
printf("%-10s%-15s%-6s%s\n", "授课学时","实验或上机学时","学分","开课学期");
while(cur!=NULL)
{
if(cur->mark>=3)
{
printf("%-10s%-10s%-10s%-10d", cur->cnum, cur->cname, cur->ctype,cur->time);
printf("%-10d%-12d%-12d%d\n",cur->ttime,cur->etime,cur->mark,cur->term);
}
cur=cur->next;
}
}

Answer 1

你这个只有在 i= 48时才能跳出tcont 。其他的时候都只能跳出swith而跳不出while循环。