处理到文件尾是什么意思。

Question

处理到文件尾是什么意思。
凑个字数13568965332367898

#include<stdio.h>
#include<stdlib.h>
int main()
{
    int score=0;
    while (scanf("%d", &score)!=EOF)
    {
        if (score > 100 || score < 0)
        {
            printf("error!\n");
            continue;
        }
    else
    {score /= 10;
        switch (score)
        {
        case 10:
            printf("A\n");
            break;
        case 9:
            printf("A\n");
            break;
        case 8:
            printf("B\n");
            break;
        case 7:
            printf("C\n");
            break;
        case 6:
            printf("D\n");
            break;
        default:
            printf("E\n");
        }
    }
    }
    return 0;
}

Answer 1

代码呢？