逐屏打印文件内容

#include <stdio.h>
#include <stdlib.h>
#define A_SCREEN 5 //每次输出的行数
#define MAX_CHAR_EACH_LINE 100  //每行最大字符数
int main()
{
    FILE *fp;
    if(NULL == (fp = fopen("test", "r")))
    {
        printf("file dosen't exist!");
        return -1;
    }
    int count;
    char line[MAX_CHAR_EACH_LINE] = {' '};
    char input = 'n';
    fgets(line, MAX_CHAR_EACH_LINE, fp);
    while(input != 'Q' && input != 'q' && !feof(fp))
    {
        for(count = A_SCREEN; count > 0 && !feof(fp); --count)
        {
            printf("%s",line);
            fgets(line, MAX_CHAR_EACH_LINE, fp);
        }
        input = getchar();  //接收用户输入
    }
    if(feof(fp))
    {
        printf("meet end of the file!\n");
    }
    else
    {
        printf("quit!\n");
    }
    return 0;
}