crapsFixByFourSub.cpp

// Fig. 5.14: fig05_14.c
// Simulating the game of craps.
#include <stdio.h>
#include <stdlib.h>
#include <time.h>


int rollDice( void ); // function prototype
int compareDiceNumber(int sum);
int getStatis(int *myPoint, int status);
void getResult(int gameStatus);

// function main begins program execution
int main( void )
{
   int sum; // sum of rolled dice
   // enumeration constants represent game status
   enum Status { CONTINUE, WON, LOST };
   enum Status gameStatus; // can contain CONTINUE, WON, or LOST

   sum = rollDice(); // first roll of the dice
   
   int realStatus = compareDiceNumber(sum);
   getResult(realStatus);
   system("pause");
   return 0;
} // end main

// roll dice, calculate sum and display results
int rollDice( void )
{
   int die1; // first die
   int die2; // second die
   int workSum; // sum of dice
   srand( time( NULL ) );

   die1 = 1 + ( rand() % 6 ); // pick random die1 value
   die2 = 1 + ( rand() % 6 ); // pick random die2 value
   workSum = die1 + die2; // sum die1 and die2

   // display results of this roll
   printf( "Player rolled %d + %d = %d\n", die1, die2, workSum );
   return workSum; // return sum of dice
} // end function rollRice


int compareDiceNumber(int sum){
    // enumeration constants represent game status
    enum Status { CONTINUE, WON, LOST };
    enum Status gameStatus;
    int SecondPoint = 0;
    
    switch( sum ) {
            
      // win on first roll
      case 7: // 7 is a winner
      case 11: // 11 is a winner
         gameStatus = WON; // game has been won
         break;

      // lose on first roll
      case 2: // 2 is a loser
      case 3: // 3 is a loser
      case 12: // 12 is a loser
         gameStatus = LOST; // game has been lost
         break;

      // remember point
      default:
         gameStatus = CONTINUE; // player should keep rolling
         SecondPoint = sum; // remember the point
         printf( "Point is %d\n", SecondPoint ); 
         break; // optional
   } // end switch
   
  int getStatus = getStatis(&SecondPoint, gameStatus);
   // while game not complete
  return getStatus;
}

int getStatis(int *SecondPoint, int gameStatus){
    int sum;
    int myPoint = *SecondPoint; 
    enum Status { CONTINUE, WON, LOST };

    while ( CONTINUE == gameStatus ) { // player should keep rolling
          sum = rollDice(); // roll dice again
    
          // determine game status
          if ( sum == myPoint ) { // win by making point
             gameStatus = WON; // game over, player won
             return gameStatus;
          } // end if
          else {
               if ( 7 == sum ) { // lose by rolling 7
                  gameStatus = LOST; // game over, player lost
                  return gameStatus;
               } // end if
          } // end else
   } // end while
}

void getResult(int gameStatus){

     enum Status { CONTINUE, WON, LOST };
     // display won or lost message
     if ( WON == gameStatus ) { // did player win?
        puts( "Player wins" );
     } // end if
     else { // player lost
        puts( "Player loses" );
     } // end else
}