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

int rolldie()
{
    return 1+(int)(6*rand()/(RAND_MAX+1.0));
}

int main()
{
    int seedInput;
    int rollTotal = 0;
    int num2 = 0;
    int num7 = 0;
    int num12 = 0;
    int counter = 0;
    double rollAverage;

    printf("Enter the seed value as an integer: ");

    scanf("%d",&seedInput);

    srand(seedInput);

    printf("\nRolling dice 100000 times...\n\n");

    for(counter = 0; counter < 100000; counter++)
    {
        int roll1 = rolldie();
        int roll2 = rolldie();

        int rollSum = roll1 + roll2;

        rollTotal += rollSum;

        switch(rollSum)
        {
            case 2:
                num2++;
                break;
            case 7:
                num7++;
                break;
            case 12:
                num12++;
                break;
        }
    }

    printf("Done.\n\n");

    rollAverage = rollTotal / 100000.0;

    printf("Number of rolls adding up to 2: %d\n", num2);
    printf("Number of rolls adding up to 7: %d\n", num7);
    printf("Number of rolls adding up to 12: %d\n", num12);
    printf("Average sum of each roll: %.3lf\n\n", rollAverage);

    return 0;
}