数据量不是很大
但删时要删一个结构体数据
  我编了个程序 想先把数据文件导入链表，找出要删的数据后，重新输入文件中。
编译时没报错
  但运行时总是弹出程序停止的窗口
 
 请高手帮我看看哪有错啊

#include<stdio.h>
#include<stdlib.h>
struct teacher
{
    int num;
    char name[5];
    char sex;
    int wage;
    struct teacher *next;
};
main()
{int n;
    FILE *fq;
    struct teacher *p,*q,*head;
    fq=fopen("e:\\1.txt","rw");
    if(fq==NULL)
    {printf("can not open the file!\n");
    exit(0);}
    printf("Please input the one you want to delete\n");
    scanf("%d",&n);
    fread(head,sizeof(struct teacher),1,fq);
    p=q=head;
    while(!feof(fq)&&n!=p->num)
    {fread(p,sizeof(struct teacher),1,fq);q=p;}
    if(n==p->num) {q->next=p->next;}
    else printf(" no such one");
    p=q=head;
    while(p->num!=NULL)
    {fwrite(p,sizeof(struct teacher),1,fq);p=p->next;}
    fclose(fq);
}

哦，对不起啊 ，没经验。

话说可以这个论坛里截图吗？