Problems with a while-loop

Question

I want when I hit my first button (0x01) go inside the while-loop and start the timer. But I want to print in my console "Hi" everytime I hit the second button 0x02 inside the while-loop. But the program is not printing "Hi". It's just counting the timer.

int main(void)
{
    int button=0, button_2=0;

    while(1)
    {
        button = 0x01
        button_2 = 0x02

        if(button==0)
        {

            while(1)
            {

                if(button_2==0)
                {
                printf("Hi");
                }

                    if (seconds<=59)
                    {
                    printf("Seconds = %d\n", seconds);
                    }
                         else
                         {
                         minutes++;
                         seconds=0;
                         printf("Minutes = %d\n", minutes);
                         }

            }
        }


    } return 0;
}

Answer 1

The printf function is line buffered by default. Either print entire lines of call fflush(stdout); after the printf .