题解 | #密码翻译#

#include <bits/stdc++.h>
using namespace std;

bool isEngChar(char c){
    if(c<='Z' && c>='A')return true;
    else if(c<='z' && c>='a')return true;
    return false;
}

char change(char c){
    if(isEngChar(c+1))return c+1;
    else if(c == 'Z')return 'A';
    return 'a';
}

int main() {
    string s;getline(cin,s);
    string res;
    for(int i =0;i<s.length();i++){
        if(isEngChar(s[i]))
            res.push_back(change(s[i]));
        else
            res.push_back(s[i]);
    }
    cout<<res;
}
// 64 位输出请用 printf("%lld")

简单遍历字符串