C++ 代码

#include <iostream>
using namespace std;

int main()
{
    string str;
    getline(cin,str);

    for(int i=0;i<str.size();i++)
    {
        if(str[i] >= 'a' && str[i] <= 'y' )         str[i] += 1;
        else if(str[i] >= 'A' && str[i] <= 'Y')      str[i] += 1;
        else if(str[i] == 'z')   str[i] = 'a';
        else if (str[i] == 'Z')   str[i] = 'A';
    }
    cout << str <<endl;

    return 0;
}