题解

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#include<bits/stdc++.h>//万能头
using namespace std;

int main(){
    string s;//定义
    getline(cin,s);//由于有空格，所以不用cin，用getline

    for(int i=0;i<=s.size()-1;i++){
        if(s[i]>='a' && s[i]<='y'){//判断
            cout<<char(s[i]+1);//输出
        }else if(s[i]=='z'){//特判'z'
            cout<<'a';//输出
        }else if(s[i]==' '){//特判空格
            cout<<' ';//输出
        }
    }
    
    return 0;
}