// Fig. 3.10: fig03_10.cpp
// Craps
// 181H mods 10/19/98
#include <iostream.h>
#include <stdlib.h>
#include <time.h>

int rollDice( void );  // function prototype
int playAGame();

int main( int argc, char* argv[] ) {

   int numPlays = 1;
   if ( argc > 1 ) {
     // atoi converts a string of digits to integer,
     // the prototype is: int atoi( char s[] ) 
     numPlays = atoi( argv[1] );
     cout << "The command is: " << argv[0] << endl; // just curious
   }

   while ( numPlays-- > 0 ) {
      playAGame();
   }
}

int playAGame() {

   enum Status { CONTINUE, WON, LOST };
   int sum, myPoint;
   Status gameStatus;

   unsigned int t = time( 0 );
   cout << "current time in sec: " << t << endl;
   srand( t );
   sum = rollDice();            // first roll of the dice

   switch ( sum ) {
      case 7: case 11:           // win on first roll
         gameStatus = WON;
         break;
      case 2: case 3: case 12:    // lose on first roll
         gameStatus = LOST;
         break;
      default:                 // remember point
         gameStatus = CONTINUE;
         myPoint = sum;
         cout << "Point is " << myPoint << endl;
         break;                // optional   
   }

   while ( gameStatus == CONTINUE ) {    // keep rolling
      sum = rollDice();

      if ( sum == myPoint )       // win by making point
         gameStatus = WON;
      else if ( sum == 7 )          // lose by rolling 7
         gameStatus = LOST;
      else
	 ; //just continue
   }

   if ( gameStatus == WON )
      cout << "Player wins" << endl;
   else
      cout << "Player loses" << endl;

   return 0;
}

int rollDice( void )
{
   int die1, die2, workSum;

   die1 = 1 + rand() % 6;
   die2 = 1 + rand() % 6;
   workSum = die1 + die2;
   cout << "Player rolled " << die1 << " + " << die2
        << " = " << workSum << endl;

   return workSum;
}