// Simulating the game of craps.
#include <stdio.h>
#include <stdlib.h>
#include <time.h> // contains prototype for function time
// enumeration constants represent game status
enum Status { CONTINUE, WON, LOST };
int rollDice( void ); // function prototype
// function main begins program execution
int main( void )
{
int sum; // sum of rolled dice
int myPoint; // player must make this point to win
enum Status gameStatus; // can contain CONTINUE, WON, or LOST
// randomize random number generator using current time
srand( time( NULL ) );
sum = rollDice(); // first roll of the dice
// determine game status based on sum of dice
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
myPoint = sum; // remember the point
printf( "Point is %d\n", myPoint );
break; // optional
} // end switch
// while game not complete
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
} // end if
else {
if ( 7 == sum ) { // lose by rolling 7
gameStatus = LOST; // game over, player lost
} // end if
} // end else
} // end while
// display won or lost message
if ( WON == gameStatus ) { // did player win?
puts( "Player wins" );
} // end if
else { // player lost
puts( "Player loses" );
} // end else
} // 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
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
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