题解 | #字符串加密#

#include <cctype>
#include <iostream>
#include <random>
#include <string>
#include <vector>
#include <algorithm>
#include <bits/stdc++.h>
using namespace std;

int main() {
    string key;
    string mw;
    cin>>key>>mw;
    string key1 = "";
    for(int i=0;i<key.size();i++){
        string s1 = key.substr(i,1);
        //如果没找到
        if(key1.find(s1)==string::npos){
            key1 = key1+s1;
        }
    }
    string s2 = "abcdefghijklmnopqrstuvwxyz";
    for(int i=0;i<s2.size();i++){
        string s3 = s2.substr(i,1);
        if(key1.find(s3)==string::npos){
            key1+=s3;
        }
    }
    // for(int i=0;i<key1.size();i++){
    //     cout<<key1[i];
    // }
    for(int i=0;i<mw.size();i++){
        string s4 = mw.substr(i,1);
        if(s4>="a"&&s4<="z"){
            int wz = s2.find(s4);
            cout<<key1[wz];
        }else if(s4>="A"&&s4<="Z"){
            char s5 = (char)s4[0];
            int wz = s2.find(s5);
            s5 = (char)key1[wz];
            toupper(s5);
            cout<<s5;
        }else{
            cout<<s4;
        }
    }
}
// 64 位输出请用 printf("%lld")