程序代码：

# include "stdio.h"
# include "stdlib.h"
void main()
{
    FILE *fp;
    char ch;
    if((fp=fopen("chen.txt","r+"))==NULL)
    {
        printf("error!");
        getchar();
        exit(1);
    }
    while(ch=fgetc(fp)!=EOF)
       printf("%c",ch);
    fclose(fp);
}

 
  [local]1[/local]

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程序代码：

# include "stdio.h"
# include "stdlib.h"
void main()
{
    FILE *fp;
    char ch;
    if((fp=fopen("chen.txt","r+"))==NULL)
    {
        printf("error!");
        getchar();
        exit(1);
    }
    ch=fgetc(fp);
    while(ch!=EOF)
    {
       printf("%c",ch);
       ch=fgetc(fp);
    }

    fclose(fp);
}

程序代码：

# include "stdio.h"
# include "stdlib.h"
void main()
{
    FILE *fp;
    char ch;
    if((fp=fopen("text.txt","r+"))==NULL)
    {
        printf("error!");
        getchar();
        exit(1);
    }
    while((ch=fgetc(fp))!=EOF)//加个括号即可（逻辑运算符优先级高于赋值运算符）当ch为真即ch=1时在ASCII里面代表笑脸字符！！！
       printf("%c",ch);
    fclose(fp);
}