小鑫の日常系列故事（七）——小纸条

参考代码

#include<stdio.h>
#include<string.h>
int main()
{
    int i,n,m;
    char a[10005];
    while(~scanf("%d%*c",&n))
    {
        gets(a);
        n %= 26;
        for(i = 0; i < strlen(a); i++)
        {
            if(a[i] >= 'a' && a[i] <= 'z')
            {
                 m = a[i] - n;
            if(m > 'z')
                a[i] = m - 26;
            else if(m < 'a')
                a[i] = m + 26;
            else
                a[i] = m;
            }
        }
        puts(a);
    }
    return 0;
}