main.cpp

#include <iostream>

using namespace std;

int main() {
    string stringToMatch = "And this is the testimony:"
 " that God has given us eternal life, and this life is in His Son."
" He who has the Son has life; he who does not have the Son of God does not have life.";
    string stringToParse;
    string stringOfWhatHasBeenMemorized;
    cout << "1 John 5:11-12 " << endl;

    getline(cin, stringToParse);

    for (int i = 0; i < stringToMatch.length(); i++) {
        if (stringToMatch[i] == stringToParse[i]) {
            stringOfWhatHasBeenMemorized += stringToMatch[i];
        }else {
            stringOfWhatHasBeenMemorized += "_";
        }
    }
    cout << stringOfWhatHasBeenMemorized << endl;
    return 0;
}