delay_calculator.c

#include <stdio.h>
#include <stdbool.h>

/* Contains floor() which will round */
#include <math.h>

/* Prototyping */
bool calculate_instructions(int delay1, int delay2);
bool float_mod(double instructions);

int desired_instructions = 31244;

int main()
{
        int delay1, delay2;
        bool found = false;


        P1:while(!found)
        {
                for(delay1 = 1; delay1 <= 255; delay1++)
                {
                        for(delay2 = 1; delay2 <= 255; delay2++)
                        {
                                bool b = calculate_instructions(delay1, delay2);
                                if(b)
                                {
                                        printf("%d and %d\n", delay1, delay2);
                                        found = true;
                                        goto P1;
                                }
                        }
                }
                return 1;
        }

        return 0;
}

bool calculate_instructions(int delay1, int delay2)
{
        double instructions = ((((delay1 - 1) * 3) + 2 + 2) * (delay2 - 1));

        if(float_mod(instructions) && ((int) instructions == desired_instructions))
        {
                return true;
        }

        return false;
}


bool float_mod(double instructions)
{
        double modulo = instructions - floor(instructions);
        if(!modulo)
        {
                return true;
        }
        return false;
}