文件操作——不能正确从输出文件中的字符

Question

#include<stdlib.h>
#include<stdio.h>
int main()
{
    FILE *fp;
    fp=fopen("111.txt","r+");
    
    if(fp==NULL)
    {
    printf("flaut!");exit(0);
    }
    char c;
    while(c=fgetc(fp)!='@')
    {
        printf("%c",c);    
    }
    
    fclose(fp);
}

Answer 1

改动处见注释，供参考：

#include<stdlib.h>
#include<stdio.h>
int main()
{
    FILE *fp;
    fp=fopen("111.txt","r+");
    if(fp==NULL)
    {
        printf("flaut!");exit(0);
    }

    char c;
    while((c=fgetc(fp))!='@')  //(c=fgetc(fp)!='@') 修改
    {
        printf("%c",c);    
    }
    fclose(fp);
    return 0;   //修改
}