XOR encryption

#include <iostream>
#include <string>
using namespace std;
int main()
{
    string str = "";
        char q = '*';
    cin>>str;
        for(int i = 0;i < str.size();i++){
            str[i]^=q;

            }
        cout<<str;
            for(int i = 0;i < str.size();i++){
                str[i]^=q;

                }
        cout<<"\n\n"<<str;
    }