题解 | 凯撒加密

#include <stdio.h>
#include<string.h>
int main() {
    int n = 0;
    char s[1001] = { 0 };
    char psd[1001] = { 0 };
    scanf("%d", &n);
    scanf(" %s", s);
    int len = strlen(s);
    int i = 0;
    while (len--) {
        if (s[i] + n > 'z') {
            psd[i] =(s[i]-'a'+n)%26+'a';
        }
        else {
            psd[i]=s[i] + n;
        }
        i++;
    }
    printf("%s\n", psd);
    return 0;
}