#include <iostream>

static const char* license="x31lfkssfaskfs";

void showMessageError(){
    std::cout << "Exiting program " << std::endl;
}

void continueProgram(){
    std::cout << "Continuing program " << std::endl;
}

void checkLicence(){
    std::string input;
    std::cout << "Enter licence key" << std::endl;
    std::cin >> input;
    std::string licenceString = license;
    if(licenceString==input){
        continueProgram();
    }
    else{
        showMessageError();
    }
}

int main(void){
    checkLicence();
}