Demo.cpp

#include <iostream>
#include <Windows.h>

using namespace std;

void Function1() {
    cout << "This is function 1" << endl;
}

void Function2(const char* str) {
    cout << str << endl;
}

int main()
{
    while (true)
    {
        if (GetAsyncKeyState(VK_NUMPAD1) & 1) {
            Function1();
            Function2("This is function 2 !!!");
        }
    }
}