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

#define SCENARIO_COUNT 1000

bool fiftyFifty();

int main()
{
    srand(time(NULL));
    bool firstFlip, secondFlip;
    int scenariosRun, hhCount=0, htCount=0, ttCount=0;

    for(scenariosRun = 0; scenariosRun < SCENARIO_COUNT; scenariosRun++)
    {
        firstFlip = fiftyFifty(); //both flips are 50/50
        secondFlip= fiftyFifty();

        if(!firstFlip && !secondFlip)
        {
            ttCount++;
        }

        while(!firstFlip && !secondFlip) //check for TT
        {
            firstFlip = fiftyFifty(); //flip both coins again as long as both are TT
            secondFlip= fiftyFifty();
        }

        if(firstFlip && secondFlip) //if both coins are heads, this counter goes up
        {
            hhCount++;
        }
        if(!firstFlip || !secondFlip) //if either coin is tails, this counter goes up
        {
            htCount++;
        }
    }

    //print results
    printf("Results gathered from %d scenarios in which one heads is guaranteed:", scenariosRun);
    printf("\nTimes both were heads:  %d", hhCount);
    printf("\nTimes one was heads:  %d", htCount);
    printf("\nTT reflips:  %d", ttCount);

    return 0;
}

bool fiftyFifty()
{
    int isCrit = rand() % 2;
    if (isCrit == 1)
    {
        return true;
    }
    else
    {
        return false;
    }
}