Challenge #2 Buckys Room - Rolling dice

#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#include <math.h>
#include <windows.h>
#include <time.h>

/*
Challenge #2 Buckys Room
Rolling dice by Goran
*/

int main()
{
    int diceA, diceB, diceC, diceSumFirstTime, diceSumSecondTime;
    char answer[7]; // 7 bytes for storing user answer Yes or No. Also for storing second question answer Higher, Lower or Same.

    printf("Are you ready to roll the dice ? "); // asking user is he ready to roll the dice. User answer with Yes, Y, No or N.
    scanf(" %s", answer); // gets input from user and stores it into char answer.
    answer[0] = toupper(answer[0]); // making first letter user input uppercase if it's already not.

    if(answer[0] == 'Y'){
        srand (time(NULL)); // this line initialize random seed.
        diceA = (rand() % 6) + 1;
        diceB = (rand() % 6) + 1;
        diceC = (rand() % 6) + 1;

        printf("\nDice A: %d \n", diceA); // prints first random number.
        Sleep(1000); // pausing here for 1 second.
        printf("Dice B: %d \n", diceB); // prints second random number.
        Sleep(1000); // pausing here for 1 second.
        printf("Dice C: %d \n", diceC); // prints third random number.
        Sleep(1000); // pausing here for 1 second.

        diceSumFirstTime = diceA + diceB + diceC; // calculating sum of all dices.
        printf("Dice Sum: %d \n \n", diceSumFirstTime); // prints sum of all dices.
        Sleep(1000); // pausing here for 1 second.

    printf("Will the sum of next three dices be higher, lower or same ? "); // asking user a question. User answer with Higher, H, Lower, L, Same or S.
    scanf(" %s", answer); // gets input from user and stores it into char answer.
    answer[0] = toupper(answer[0]); // making first letter user input uppercase.

    if(answer[0] == 'H' || answer[0] == 'L' || answer[0] == 'S'){
        printf("Rolling for the second time. \n"); // prints message about rolling for the second time.
        Sleep(1000); // pausing here for 1 second.

        diceA = (rand() % 6) + 1;
        diceB = (rand() % 6) + 1;
        diceC = (rand() % 6) + 1;

        printf("\nDice A: %d \n", diceA); // prints first random number.
        Sleep(1000); // pausing here for 1 second.
        printf("Dice B: %d \n", diceB); // prints second random number.
        Sleep(1000); // pausing here for 1 second.
        printf("Dice C: %d \n", diceC); // prints third random number.
        Sleep(1000); // pausing here for 1 second.

        diceSumSecondTime = diceA + diceB + diceC; // calculating sum of all dices for the second time.
        printf("Dice Sum: %d \n \n", diceSumSecondTime); // prints sum of all dices for the second time.
        Sleep(1000); // pausing here for 1 second.

    if(diceSumFirstTime < diceSumSecondTime && answer[0] == 'H'){
        printf("Well done. Sum is higher then first roll. \n"); // if diceSumFirstTime is lower then diceSumSecondTime and answer is Higher this message is printed.
    }else if(diceSumFirstTime > diceSumSecondTime && answer[0] == 'L'){
        printf("Well done. Sum is lower then first roll. \n"); // if diceSumFirstTime is higher then diceSumSecondTime and answer is Lower this message is printed.
    }else if(diceSumFirstTime == diceSumSecondTime && answer[0] == 'S'){
        printf("Well done. Sum is the same as first roll. \n"); // if diceSumFirstTime is same as diceSumSecondTime and answer is Same this message is printed.
    }else{
        printf("Just unlucky. \n");
    }

    }else{
        printf("Maybe try next time. \n \n"); // message that prints to user if he doesn't enter correct option.
        }
    }else{
        printf("Maybe try next time. \n \n"); // message that prints to user if he doesn't enter correct option.
        }

    system("pause"); // pausing program after executing.
    return 0;
}