comp generates rand num betw 1 and 20 and you guess it

#include <iostream>
#include <cstdlib>

using namespace std;

int main()
{
    int num1, num2;

    cout << "your number is: ";
    cin >> num2;

    srand(time(NULL));
    num1 = rand() % 20 + 1;

    cout << "computer number is: " << num1 << endl;

    if (num2 == num1)
    {
        cout << true;
    }
    else cout << false;
}