#include <iostream>
#include <cstdlib>
using namespace std;

int main()
{
    char start_ans[80];
    do
    {
        cout << "\n\nWhat do you want to do?\n\n"
            << " [1] one\n [2] two\n [3] three\n\n"
            << "Your answer will be: ";
        cin >> start_ans;
    } while (atoi(start_ans) != 1 && atoi(start_ans) != 2 && atoi(start_ans) != 3);

    system("pause");
    return 0;
}