c - SPOJ 显示我对 : http://www. spoj.com/BSCPROG/problems/SMPCPH1/的解决方案的错误答案

Question

#include <stdio.h>
#include <string.h>
#include <stdlib.h>

main() {
    int n, m, i, j, k;
    char a[100], b[100];
    scanf("%d", &n);
    if (n > 26 && n <= 1)
        exit(0);
    scanf("%s", a);
    scanf("%d", &m);
    if (m > 100 && m <= 1)
        exit(0);
    for (i = 0; i < m; i++) {
        fgets(b, 100, stdin);
        for (j = 0; b[j] != '\0'; j++) {
            for (k = 0; k < n; k++) {
                if (a[k] == b[j]) {
                    if (k == (n - 1)) {
                        b[j] = a[0];
                        break;
                    } else {
                        b[j] = a[k+1];
                        break;
                    }
                }
            }
        }
        printf("%s",b);
    }
    return 0;
}

I just have written C code for the problem: http://www.spoj.com/BSCPROG/problems/SMPCPH1/ With the given example my program gives desired result but spoj says it is wrong. How can I find mistakes?

Answer 1

您需要对代码进行 3 处更改:

• 在参数验证测试中使用 || 而不是 &&。
• 扫描并忽略数字解析为m后的换行符，否则下一个fgets()将读取空行

这是更正后的代码:

if (n > 26 || n <= 1)
    exit(0);
scanf("%s", a);
scanf("%d%*c", &m);
if (m > 100 || m <= 1)
    exit(0);