#include <iostream>
#include <fstream>
#include <limits>
using namespace std;
int main()
{
    int num;
    do {
        cout << "How many:\n";
        cin >> num;
        if(!cin)
        {
            cout << "This wasn't even a number!\n";
            cin.clear();
            cin.ignore(numeric_limits<streamsize>::max(), '\n');
        }
    } while (num<1 || num>3);
    cout << "You've entered " << num << '\n';
}