streak.c

#include <stdio.h>
#include <cs50.h>
#include <stdlib.h>
#include <time.h>

int main(int argc, string argv[])
{
    if (argc != 2)
    {
        printf("USAGE: ./streak LENGTH\n");
        return 1;
    }

    int streakTarget = atoi(argv[1]);
    int currentStreak = 1;
    int prevFlip = 999;
    int totalFlips = 0;

    srand(time(0));
    int flip=0;

    while (currentStreak < streakTarget)
    {
        //Flip the coin
        flip = rand() % 2;

        if (flip == 0)
        {
            printf("H");
        }
        else
        {
            printf("T");
        }

        //check streak
        if (flip == prevFlip)
        {
            currentStreak++;
        }
        else
        {
            currentStreak = 0;
        }

        prevFlip = flip;
        totalFlips++;
    }

    printf("\nIt took %i flips to get a steak of %i\n", totalFlips, streakTarget);

}