Craps

/*
 a4q1.cpp
 Craps

 Created by Hayden Lueck on 2014-10-30.
 Copyright (c) 2014 Hayden Lueck. All rights reserved.

 Program Purpose: Simulate game of craps and test out function use

 main function: Declared variables, seeds RNG, contains main loop, passes variables
                to getRoll, calcSum, and printRoll. Prints out whether user has won or lost.

 getRoll function: takes in a number to set as the roll, and gives it a random number from 1 to 6
 calcSum function: takes in roll1, roll2, and sum to set the value of the current point in the
                    main function
 printRoll function: Prints out the 2 numbers rolled, and the sum of said numbers.

 input: None from user, randomly generates numbers within the program
 output: The game of craps played, all numbers rolled, and whether the round was won or lost

 limitations: User does not input any numbers themselves

 */

#include <iostream>
#include <time.h>

/****** Function Prototyping ******/
void getRoll(int&);
void calcSum(int, int, int&);
void printRoll(int, int, int);

/****** Main Function ******/
int main()
{
    int roll1, roll2, point = 0, lastPoint = 1; //declare integers, prime point and lastPoint
    bool endFlag = true, pointFlag = false; //declare boolean values for flags
    srand(int(time(0))); //seed RNG based off of time

    do{
        getRoll(roll1); //set random number between 1 and 6 to int roll1
        getRoll(roll2); //and then roll2

        calcSum(roll1, roll2, point); //calculate the sum of roll1 and roll2, set it to point
        printRoll(roll1, roll2, point); //print out the sum of roll1 and roll2

        if(point == lastPoint                       //if point is 2, 3, 12, or 11 the first round through
           || (point == 2 && pointFlag == false)    //or 7 at any point, or the point is the same as the
           || (point == 3 && pointFlag == false)    //last point
           || (point == 12 && pointFlag == false)
           || point == 7
           || (point == 11 && pointFlag == false)){

            endFlag = false; //set endFlag to end the loop

        }else{ //otherwise
            std::cout << "Point is " << point << std::endl; //tell user current point
            lastPoint = point;                              //set lastPoint to current point
            pointFlag = true;                               //set pointFlag to true to indicate
                                                            //the point loop has begun
        }

    }while(endFlag); //go until endFlag is true

    if(point == lastPoint
       || point == 2        //if point is 2, 3, 12, or 11 with the pointFlag being true
       || point == 3
       || point == 12
       || (point == 11 && pointFlag == true)){
        std::cout << "You win." << std::endl; //print out that user won
    }else if (point == 7 || (point == 11 && pointFlag == false)){ //or point is 7 or 11 with
                                                                  //pointFlag being flase
        std::cout << "You lose." << std::endl; //print out that user loses
    }else{ //in case code is modified and breaks something
        std::cout << "Error" << std::endl; //print out error
    }

    return 0;
}

/****** getRoll function ******/
void getRoll(int& roll) //takes in a roll by reference
{
    roll = rand()%6+1; //get a random number between 1 and 6
}

/****** calcSum function ******/
void calcSum(int roll1, int roll2, int& sum) //takes in roll1, roll2, and the sum (by reference)
{
    sum = roll1 + roll2; // set sum (point in main function) to the sum of roll1 and roll2
}

/****** printRoll function ******/
void printRoll(int roll1, int roll2, int sum) //takes in roll1, roll2, and the sum (all by value)
{
    std::cout << "You rolled " << roll1 << " + "
    << roll2 << " = " << sum << std::endl; //print out equation for dice rolled

}