(7.18) (Craps Game Modification)

Modify the program of Fig. 6.9 to play 1000 games of craps. The program should keep track of the statistics and answer the following questions:

a) How many games are won on the 1st roll, 2nd roll, , 20th roll, and after the 20th roll?

b) How many games are lost on the 1st roll, 2nd roll, , 20th roll, and after the 20th roll?

c) What are the chances of winning at craps? [Note: You should discover that craps is one

of the fairest casino games. What do you suppose this means?]

d) Whats the average length of a game of craps?

e) Do the chances of winning improve with the length of the game?

Below I have provided the initial program from Fig 6.9 that should be added onto! Please help!

// Fig. 6.9: fig06_09.cpp // Craps simulation.

#include #include // contains prototypes for functions srand and rand #include // contains prototype for function time using namespace std;

unsigned int rollDice(); // rolls dice, calculates and displays sum

int main() { // scoped enumeration with constants that represent the game status enum class Status { CONTINUE, WON, LOST }; // all caps in constants

// randomize random number generator using current time srand(static_cast(time(0)));

unsigned int myPoint = 0 ; // point if no win or loss on first roll Status gameStatus; // can be CONTINUE, WON or LOST unsigned int sumOfDice{ rollDice() }; // first roll of the dice

// determine game status and point (if needed) based on first roll switch (sumOfDice) { case 7: // win with 7 on first roll case 11: // win with 11 on first roll gameStatus = Status::WON; break; case 2: // lose with 2 on first roll case 3: // lose with 3 on first roll case 12: // lose with 12 on first roll gameStatus = Status::LOST; break; default: // did not win or lose, so remember point gameStatus = Status::CONTINUE; // game is not over myPoint = sumOfDice; // remember the point cout << "Point is " << myPoint << endl; break; // optional at end of switch }

// while game is not complete while (Status::CONTINUE == gameStatus) { // not WON or LOST sumOfDice = rollDice(); // roll dice again

// determine game status if (sumOfDice == myPoint) { // win by making point gameStatus = Status::WON; } else { if (sumOfDice == 7) { // lose by rolling 7 before point gameStatus = Status::LOST; } } }

// display won or lost message if (Status::WON == gameStatus) { cout << "Player wins" << endl; } else { cout << "Player loses" << endl; } }

// roll dice, calculate sum and display results unsigned int rollDice() { int die1{ 1 + rand() % 6 }; // first die roll int die2{ 1 + rand() % 6 }; // second die roll int sum{ die1 + die2 }; // compute sum of die values

// display results of this roll cout << "Player rolled " << die1 << " + " << die2 << " = " << sum << endl; return sum; }