#include <math.h>
#include <stdio.h>
#include <stdlib.h>

#define ITERATIONS 1000000
#define NUM_OPTIONS 4

float options[NUM_OPTIONS] =
{
    0.25,
    0.5,
    0.6,
    0.25
};

int main(int argc, char *argv[])
{
    int numCorrectGuesses = 0;
    int i;

    for(i=0;i<ITERATIONS;i++)
    {
        int guess = rand()%NUM_OPTIONS;
        int optioni;
        int numMatches = 0;

        for (optioni=0;optioni<4;optioni++)
        {
            if (options[optioni] == options[guess])
                numMatches++;
        }

        if (((float)numMatches / 4.0) == options[guess])
            numCorrectGuesses++;
    }

    printf("Guessed correctly %f\n", (float)numCorrectGuesses / (float)ITERATIONS);

    return 0;
}