#include <stdio.h>
#include <conio.h>

void adicao (int a, int b);
void subtracao (int a, int b);
void multiplicacao (int a, int b);
void divisao (int a, int b);

int main(void)
{
    int c = 0;


    while (c < 1)
    {
        printf("\npress any button");

	if(getch() == 'f')
	{
		printf("%s\n", "'f' clicado.");
		break;
	}
	else if(getch() == 'k')
	{
		printf("%s\n", "'k' clicado.");
		break;
	}

        adicao (23, 23);
        subtracao (12, 5);
        multiplicacao (12, 14);
        divisao (12, 3);
    }
}

void adicao (int a, int b)
{
     printf("\n\n%d + %d = %d\n", a, b, a + b);
}

void subtracao (int a, int b)
{
     printf("%d - %d = %d\n", a, b, a - b);
}

void multiplicacao (int a, int b)
{
     printf("%d * %d = %d\n", a, b, a * b);
}

void divisao (int a, int b)
{
     printf("%d / %d = %d\n", a, b, a / b);
}