题解 | #字符串加解密#

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

string s1,s2;

string jiami(string &s){
    for(int i = 0 ; i < s.size(); ++i){
        if(islower(s[i])){
            s[i] = (s[i] - 'a' + 1)%26+'A' ;
            
        }else if(isupper(s[i])){
            s[i] = (s[i] - 'A' +1)%26 +'a';
            
        }else if(isdigit(s[i])){
            s[i] = (s[i] - '0' +1)%10 +'0';
        }
        
    }
    return s;
    
}
string jiemi(string &s){
    for(int i = 0 ; i < s.size(); ++i){
        if(islower(s[i])){
            s[i] = (s[i] - 'a' +25)%26+'A' ;
            
        }else if(isupper(s[i])){
            s[i] = (s[i] - 'A' +25 )%26 +'a';
            
        }else if(isdigit(s[i])){
            s[i] = (s[i] - '0' + 9 )%10 +'0';
        }
        
    }
    return s;
    
}





int main(){
    while(cin>>s1>>s2){
        string out1=jiami(s1);
        string out2=jiemi(s2);
        cout<<out1<<endl;
        cout<<out2<<endl;
        
    }
}