#include <iostream>using namespace std;int main(){int k,i;char s[5]; cin>>k; for(;k>=26;)k%=26; for(i=0;i<5;i++) { cin>>s[i]; if((‘a‘<=s[i]&&s[i]<=‘z‘)||(‘A‘<=s[i]&&s[i]<=‘Z‘)) {s[i]+=k; if((‘z‘<=s[i]&&s[i]<=‘z‘+k)||(‘Z‘<=s[i]&&s[i]<=‘Z‘+k)) s[i]-=26; } cout<<s[i]; } cout<<endl;return 0;}原文：http://www.cnblogs.com/lxh-boke/p/4537196.html