#include<stdio.h>
#include<stdlib.h>
#include"head.h"
void save(struct student stu[],int k)
{
    FILE *fp;
    int i;
    char x;
    if ((fp = fopen("C:\\Users\\asusq\\Desktop\\mmh2\\wen.txt", "w")) == NULL);
    {
        printf("error\n");
        exit(-1);
    }

if ((fp = fopen("C:\\Users\\asusq\\Desktop\\mmh2\\wen.txt", "w")) == NULL);
改为if (fp=(fopen("C:\\Users\\asusq\\Desktop\\mmh2\\wen.txt", "w")) ==NULL);//注意括号

反斜杠呀

回二楼，我的括号应该没错吧

对是我错了

if ((fp = fopen("C:\\Users\\asusq\\Desktop\\mmh2\\wen.txt", "w")) == NULL); <<<----多了一个分号