#include <iostream>
#include <conio.h>

int main()
{
    int array[5] = { 10,20,30,40,50 };
    int value = 0;

    std::cout << "please pick a value between 0 and 4: " << std::endl;
    std::cin >> value;
    while (value > 4 || value < 0)
    {
        std::cout << "Please only select a value between 0 and 4: ";
        std::cin >> value;
    }
    std::cout << "Your number is: " << array[value] << std::endl;
    _getch();
}