Thread: C++ NIM with functions

I have a C++ program that I can not get to run. Can you
please help me find the problem. The code is listed below.


*************************************/

Code:

#include <iostream> 


using namespace std; 

  

// Let's define constants to identify the sides
const bool HUMAN_PLAYER = true;
const bool COMPUTER_PLAYER = false; 

  

// Function Prototypes - Messages to the player
void welcomeMessage();
void congratulateWinner( bool theWinner );
void gameStatus( int pileSize ); 

  

// Function Prototypes - User Interface
// Decide who gets to play first
bool pickFirstPlayer(); 

  

// Function Prototypes - Moves
int getHumanPlayerMove( int pileSize );
int getComputerPlayerMove( int pileSize ); 

  

// Function Prototypes - Predicates
bool isGameOver( int pileSize ); 

  

// The main NIM Program
int main()
{
  // Start by saying hello to the player
  welcomeMessage(); 

  

  // Now, let's ask the human player who goes first
  bool currentPlayer = pickFirstPlayer();
 
  // Now that we know who plays first, we can start
  // the game by initializing the heap of sticks
  int nimSticks = 22; 

  

  // CORE GAME LOOP: as long as there are sticks left,
  // we'll need to get moves from the opponents
  while( !isGameOver( nimSticks) )
  {
    // Show the status of the game
    gameStatus( nimSticks ); 

  

    // Let's get a move from the current player
    int currentPlayerMove;
    if( currentPlayer == HUMAN_PLAYER )
      currentPlayerMove = getHumanPlayerMove( nimSticks );
    else
      currentPlayerMove = getComputerPlayerMove( nimSticks ); 

  

    // Now that we know how many sticks the current
    // player wants to take, we remove them from the
    // pile
    nimSticks -= currentPlayerMove; 

  

    // Do we have a winner?
    if( isGameOver( nimSticks ) )
      congratulateWinner( currentPlayer );
 
    // If there are sticks left in the pile, it is
    // now the other player's turn
    else
      currentPlayer = !currentPlayer;
  }
 
  // And we're done!
  return 0;
} 

  

// welcomeMessage() - Say Hi to the player
void welcomeMessage()
{
  cout << "Welcome to the Game of Single-Pile Nim!" << endl;
  cout << "---------------------------------------" << endl << endl;
  return;
} 

  

// congratulateWinner() - Tell the player who won
void congratulateWinner( bool theWinner )
{
  // If so, who has just taken the last stick?
  if( HUMAN_PLAYER == theWinner )
  {
    cout << "You win. Congratulations!" << endl;
  }
  else
  {
    cout << "I win! Better luck next time..." << endl;
  }
  return;
} 

  

// gameStatus() - Tell the player how many sticks
// are left in the pile before a turn
void gameStatus( int pileSize )
{
 int stickStatus = pileSize;
 cout << "There are/is " <<stickStatus << " stick(s) left." <<endl<<endl;
	return;
} 

  

// pickFirstPlayer() - Ask the user who goes first
bool pickFirstPlayer()
{
  int count = 2;
	int compTurn;
	char start;
	
	cout << "IT'S NIM TIME!!!!!!" <<endl<<endl;

	while(count >= 0)
	{
		cout << "Who starts? [H]uman or [C]omputer?" <<endl;
		cin >> start;
		switch(start)
		{
		case 'C':
		case 'c':cout << "Computer start." <<endl; count = -1; compTurn = true; break;
		case 'H':
		case 'h':cout << "Human start." <<endl; count = -1; true;compTurn = true; break;
		default:cout << count << " try(s)left" <<endl;
		}
		if(count == 0)
			cout << "NO GO!!!!!              Sorry." <<endl<<endl;
	--count;
	}
	//return(compTurn);
	return true;
} 


// getHumanPlayerMove() - Ask the player for a number
// of sticks to take out of the pile
int getHumanPlayerMove( int pileSize )
{
  int pickstick;
	int no = 3;
int nimSticks = pileSize;
	while(no != 0)
	{
		cout << "Take how many sticks?: ";
		cin >> pickstick;
		cout << endl;
		if(1 <= pickstick && pickstick <= 4)
		{
			nimSticks -= pickstick;
			cout<< "Number of sticks left: " << nimSticks << endl << endl;
			/*if(winner() == 1)
			{
				cout << "The hu-man wins!" <<endl;
				exit(0);
			}*/
			no = 0;
		}
		else
		{
			no--;
			cout << "Error. " << no << " trys left. " <<endl;
		}
	}
	return 0;
} 


// getComputerPlayerMove() - Let the machine play
int getComputerPlayerMove( int pileSize )
{  
	int nimSticks = pileSize;
	int pick = nimSticks - nimSticks % (1 + 4);
	int just = nimSticks - pick;
	if (just == 0)
	{
		just = 1 + rand() % (4 - 1 + 1);
		pick -= just;
	}
	nimSticks -= just;
	cout << "Computer takes " << just <<" stick(s)." <<endl;
	cout << "Their are " << pick << " left." <<endl;
	/*if(winner() == 1)
	{
		cout << "The COMPUTER wins!" <<endl;
		exit(0);
	}*/
	return 0;
} 


// isGameOver() - Have we reached endgame conditions?
// if there are no sticks left, yes
bool isGameOver( int pileSize )
{
  if(int nimSticks = true)
	cout<<  "The game is over." <<endl<<endl;
	return true;

Code:

bool isGameOver( int pileSize )
{
  if(int nimSticks = false)
	cout<<  "The game is over." <<endl<<endl;
  return false;
}

I changed the trues to falses and it works, but now I have a different problem. The sticks wont decrement. Here are my functions for the player and the computer:

Code:

int getHumanPlayerMove( int pileSize )
{
  int pickstick;
	int no = 3;
int nimSticks = pileSize;
	while(no != 0)
	{
		cout << "Take how many sticks?: ";
		cin >> pickstick;
		cout << endl;
		if(1 <= pickstick && pickstick <= 4)
		{
			nimSticks -= pickstick;
			cout<< "Number of sticks left: " << nimSticks << endl << endl;
			/*if(winner() == 1)
			{
				cout << "The hu-man wins!" <<endl;
				exit(0);
			}*/
			no = 0;
		}
		else
		{
			no--;
			cout << "Error. " << no << " trys left. " <<endl;
		}
	}
	return 0;
} 



int getComputerPlayerMove( int pileSize )
{  
	int nimSticks = pileSize;
	int pick = nimSticks - nimSticks % (1 + 4);
	int just = nimSticks - pick;
	if (just == 0)
	{
		just = 1 + rand() % (4 - 1 + 1);
		pick -= just;
	}
	nimSticks -= just;
	cout << "Computer takes " << just <<" stick(s)." <<endl;
	cout << "Their are " << pick << " left." <<endl;
	/*if(winner() == 1)
	{
		cout << "The COMPUTER wins!" <<endl;
		exit(0);
	}*/
	return 0;
}

>> if(int nimSticks = false)
That code is still wrong. You are declaring a new int named nimSticks and assigning it the value false. What is that function supposed to be doing?