Question

One of the most popular games of chance is a dice game known as “craps”, played in casinos around the world. Here are the rules of the game:

A player rolls two six-sided die, which means he can roll a 1, 2, 3, 4, 5 or 6 on either die. After the dice come to rest they are added together and their sum determines the outcome. If the sum is 7 or 11 on the first roll, the player wins. If the sum is 2, 3, or 12 on the first roll, the player loses (this is called “craps”). If the player rolls 4, 5, 6, 8, 9, or 10 on the first throw, then that becomes the player’s “point”. To win, the player must “make their point”, that means that they must roll the sum they got on that first throw, so they keep rolling the dice. The player loses by rolling a 7 before making the point.

Part 1: The basic program
a)   Write a flow chart or pseudo code for part 1 of the homework.

b)   Write a C++ program that simulates the playing of this game with two players. You will need:
1.   An introduction to your program with instructions and your name.
2.   The players are prompted for a random number seed.
3.   A function that generates the random numbers and prints the results to the interface. Two separate random numbers must be generated for the two die, not the sum. This function returns the toss of one die after the user is prompted to tap the spacebar.
4.   The program alternates players rolling the die.
5.   The program keeps track of the number of wins for each player.
6.   The program tells the users if player 1 or 2 wins after 3 points are won.
7.   Write the output to a file.

Part 2: Wagering
The program must ask the users if they want to gamble. This option will bypass a finite limit number of plays. Both players start with a bank balance of $1000 dollars. Each turn, players are asked to enter a minimum wager of $100. If the player wins, the balance is increased by the wager, if they lose, it is decreased. The program continues as long as the player has a positive bank balance, and they cannot wager more than is in the bank. When they lose, give a message like “Player X, you’re busted!”, and you can send other messages….

Answer 1

Hi,

writing the program itself took a lot of time.. Sorry I could not prepare the flowchart..

Please find the code below for Part 1.

For part 2, its very simple modification to do in this program... please try.. if you are unable to do, let me know will help you in that.

#include <iostream>
#include <cstdlib>
#include <ctime>

// namespace included.
using namespace std;

unsigned int rollDice();

int main(){

    // variables declared.
    unsigned int myPoint = 0;
    unsigned int sumOfDice;

    // pointsA and pointsB take care of points won by PlayerA and PlayerB.
    int pointsA = 0;
    int pointsB = 0;

    // flag takes care of who is playing the game.
    // flag = true -> Player A is playing
    // flag = false -> Player B is playing.
    bool flag = true;

    // die1 and die2 have the die value returned from rollDice() function.
    int die1 = 0;
    int die2 = 0;

    // repeat the loop till either Player wins.
    while ((pointsA != 3) && (pointsB != 3)){
        // Player A is playing
        if(flag){
            cout << endl << "-----------------------------------------" << endl;
            cout << "Player 1 is playing" << endl;
            cout << "Current points are " << pointsA << endl;
            cout << "For Die 1," << endl;
            die1 = rollDice();
            cout << "Player 1 has got " << die1 << " in die1" << endl;
            cout << "For Die 2," << endl;
            die2 = rollDice();
            cout << "Player 1 has got " << die2 << " in die2" << endl;
            sumOfDice = die1 + die2;
            cout << "Sum of the Dice is " << sumOfDice << endl;
        }
        // PlayerB playing
        else{
            cout << endl << "-----------------------------------------" << endl;
            cout << "Player 2 is playing" << endl;
            cout << "Current points are " << pointsB << endl;
            cout << "For Die 1," << endl;
            die1 = rollDice();
            cout << "Player 2 has got " << die1 << " in die1" << endl;
            cout << "For Die 2," << endl;
            die2 = rollDice();
            cout << "Player 2 has got " << die2 << " in die2" << endl;
            sumOfDice = die1 + die2;
            cout << "Sum of the Dice is " << sumOfDice << endl;
        }

        switch(sumOfDice){

            // if the sumOfDice is 7 or 11, points gained.
            case 7:
            case 11:
                    if(flag)
                        pointsA++;
                    else
                        pointsB++;
                    break;

            // if sumOfDice is 2,3, or 12, points lost.
            case 2:
            case 3:
            case 12:
                    if(flag)
                        pointsA--;
                    else
                        pointsB--;
                    break;

            // if we are in this case, try to "make point" as in the program description.
            default:
                    myPoint = sumOfDice;
                    cout << "Point is " << myPoint << endl;
                    cout << "Roll again" << endl;
                    cout << "For Die 1," << endl;
                    die1 = rollDice();
                    cout << "For Die 2," << endl;
                    die2 = rollDice();
                    sumOfDice = die1 + die2;

                    if(sumOfDice == myPoint){
                        if(flag)
                            pointsA++;
                        else
                            pointsB++;
                    }
                    else{
                        if(flag)
                            pointsA--;
                        else
                            pointsB--;
                    }
                    break;
        }
        // Change the player
        flag = !flag;
    }

    cout << endl << endl << endl;
    // check who has won the game.
    if(pointsA == 3)
        cout << "PlayerA wins" << endl;
    else if (pointsB == 3)
        cout << "PlayerB wins" << endl;

}

// return the dice value.
unsigned int rollDice(){
    int n = 0;
    cout << "Enter the seed number: " << endl;
    cin >> n;

    // srand takes the different seed each time based on the user input.
    srand(n);

    unsigned int die = 1 + rand() %6;

    return die;
}

OUTPUT:
$ g++ craps.cpp
$ ./a.out

-----------------------------------------
Player 1 is playing
Current points are 0
For Die 1,
Enter the seed number:
12
Player 1 has got 3 in die1
For Die 2,
Enter the seed number:
123
Player 1 has got 2 in die2
Sum of the Dice is 5
Point is 5
Roll again
For Die 1,
Enter the seed number:
234
For Die 2,
Enter the seed number:
345

-----------------------------------------
Player 2 is playing
Current points are 0
For Die 1,
Enter the seed number:
56
Player 2 has got 4 in die1
For Die 2,
Enter the seed number:
45
Player 2 has got 5 in die2
Sum of the Dice is 9
Point is 9
Roll again
For Die 1,
Enter the seed number:
34
For Die 2,
Enter the seed number:
456

-----------------------------------------
Player 1 is playing
Current points are -1
For Die 1,
Enter the seed number:
345
Player 1 has got 4 in die1
For Die 2,
Enter the seed number:
4567
Player 1 has got 4 in die2
Sum of the Dice is 8
Point is 8
Roll again
For Die 1,
Enter the seed number:
3
For Die 2,
Enter the seed number:
4566

-----------------------------------------
Player 2 is playing
Current points are -1
For Die 1,
Enter the seed number:
4567
Player 2 has got 4 in die1
For Die 2,
Enter the seed number:
352
Player 2 has got 2 in die2
Sum of the Dice is 6
Point is 6
Roll again
For Die 1,
Enter the seed number:
23
For Die 2,
Enter the seed number:
23

-----------------------------------------
Player 1 is playing
Current points are -2
For Die 1,
Enter the seed number:
234
Player 1 has got 6 in die1
For Die 2,
Enter the seed number:
23
Player 1 has got 3 in die2
Sum of the Dice is 9
Point is 9
Roll again
For Die 1,
Enter the seed number:
423
For Die 2,
Enter the seed number:
23
..
.
.

.
.
.
.
.
..

..

..

.After a lot of trials, finally I got the output as below

-----------------------------------------
Player 1 is playing
Current points are 2
For Die 1,
Enter the seed number:
Player 1 has got 2 in die1
For Die 2,
Enter the seed number:
Player 1 has got 2 in die2
Sum of the Dice is 4
Point is 4
Roll again
For Die 1,
Enter the seed number:
For Die 2,
Enter the seed number:


PlayerA wins