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2D arrays

yoked88 (140)
I'm working on a Pac-man game for a school project and have been trying to figure out why my move function will not work, would anyone mind looking at this? I have the AI written seperately that is ready to implement but I wanted to get the framework laid out and working properly and here is the basic stuff, things were excluded for posting here but this does compile:
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#include <iostream>
#include <string>
#include <iomanip>
#include <cstdlib>

using namespace std;

void instructions();
void playGame();
void initialize(char[][17]);
void printBoard(char[][17]);
//moving object class functions, class excluded for simplicity
bool isWall(char[][17],int,int);
void move(char[][17],char,int,int);
bool didCollide(char);


int main()
{
	int menuChoice = 9;
	do
	{
		cout<<"Welcoe to the Pac-Man game!\n";
		cout<<"To read the rules, enter 1.\n";
		cout<<"To play the game, enter 2.\n";
		cout<<"To exit, enter 0.\n";
		cin>>menuChoice;
		if(!cin)
		{
			cin.clear();
			cin.ignore(200, '\n');
			cout<<"\n\nInvalid input found, game restarting.\n\n\n";
			menuChoice = 9;
		}
		switch(menuChoice)
		{
		case 1:
			instructions();
			break;
		case 2:
			playGame();
			break;
		case 0:
			break;
		}
	}while(menuChoice != 0);
	return 0;
}

void instructions()
{
	cout<<"\nPac man, represented by P, has only one goal and that is\n";
	cout<<"to eat all the dots.  Ghosts will be chasing you along the way\n";
	cout<<"trying to stop you (B - blinky, C - clyde, I - inky, K - pinky),\n";
	cout<<"don't run into them!.  You can also eat a power dot (+) which makes\n";
	cout<<"the ghosts edible for Pac man.  Use w, a, s, d, to move.\n";
	cout<<"Good luck and happy eating!\n\n";
}

void initialize(char board[][17])
{
	int row, col;
	for(row = 0; row < 17; row++)
		for(col = 0; col < 17; col++)
			board[row][col] = '*';

	//create walls and borders
	for(row = 0; row < 17; row ++)
	{
		board[row][0] = 'X';
		board[row][16] = 'X';
		board[0][row] = 'X';
		board[16][row] = 'X';
	}
	board[1][1] = '+'; board[1][15] = '+'; board[15][1] = '+', board[15][15] = '+';
	board[1][5] = 'X'; board[1][11] = 'X'; board[2][2] = 'X';
	board[2][3] = 'X'; board[2][5] = 'X'; board[2][7] = 'X';
	board[2][8] = 'X'; board[2][9] = 'X'; board[2][11] = 'X';
	board[2][13] = 'X'; board[2][14] = 'X'; board[3][2] = 'X';
	board[3][3] = 'X'; board[3][13] = 'X'; board[3][14] = 'X';
	board[4][4] = 'X'; board[4][6] = 'X'; board[4][7] = 'X';
	board[4][8] = 'X'; board[4][9] = 'X'; board[4][10] = 'X';
	board[4][12] = 'X'; board[5][2] = 'X'; board[5][14] = 'X';
	board[6][2] = 'X'; board[6][4] = 'X'; board[6][6] = 'X';
	board[6][8] = 'X'; board[6][10] = 'X'; board[6][12] = 'X';
	board[6][14] = 'X'; board[7][2] = 'X'; board[7][4] = 'X';
	board[7][6] = 'X'; board[7][10] = 'X'; board[7][12] = 'X';
	board[7][14] = 'X'; board[8][2] = 'X'; board[8][4] = 'X';
	board[8][6] = 'X'; board[8][8] = '@'; board[8][10] = 'X';
	board[8][12] = 'X'; board[8][14] = 'X'; board[9][2] = 'X';
	board[9][4] = 'X'; board[9][6] = 'X'; board[9][10] = 'X';
	board[9][12] = 'X'; board[9][14] = 'X'; board[11][1] = 'X';
	board[11][3] = 'X'; board[11][5] = 'X'; board[11][6] = 'X';
	board[11][7] = 'X'; board[11][8] = 'X'; board[11][9] = 'X';
	board[11][10] = 'X'; board[11][11] = 'X'; board[11][13] = 'X';
	board[11][15] = 'X'; board[12][1] = 'X'; board[12][3] = 'X';
	board[12][13] = 'X'; board[12][15] = 'X'; board[13][5] = 'X';
	board[13][6] = 'X'; board[13][7] = 'X'; board[13][9] = 'X';
	board[13][10] = 'X'; board[13][11] = 'X'; board[14][2] = 'X';
	board[14][3] = 'X'; board[14][7] = 'X'; board[14][9] = 'X';
	board[14][13] = 'X'; board[14][14] = 'X'; board[15][5] = 'X';
	board[15][11] = 'X';
}

void printBoard(char board[][17])
{
	int row, col;
	cout<<endl;
	for(row = 0; row < 17; row++)
	{
		for(col = 0; col < 17; col++)
		{
			cout<<setw(2)<<board[row][col];
		}
		cout<<endl;
	}
	cout<<endl;
}

//moving object class functions, class excluded for simplicity
bool isWall(char board[][17], int row, int col)
{
	if(board[row][col] == 'X')
		return true;
}

void move(char board[][17], char object, int row, int col)
{
	bool wall = isWall(board,row,col);
	if(wall == false)
		board[row][col] = object;
}

bool didCollide(char object)
{
	if(object == 'P')
		return true;
}

//main game loop functions
void playGame()
{           
	        //win loss variables          player location
	int dotCount = 147, livesLeft = 2, Prow = 12, Pcol = 8;
           //blinky location    clyde location
	int Brow = 7, Bcol = 8, Crow = 7, Ccol = 8;
	      //inky location     pinky location
	int Irow = 7, Icol = 8, Krow = 7, Kcol = 8;
	char board[17][17];
	char input;
	bool wall;
	char blinky = 'B', clyde = 'C', inky = 'I', pinky = 'K', player = 'P';
	//blinky chases, pinky ambushes, inky is unpredictable, clyde is slow
	initialize(board);
	board[12][8] = 'P';
	board[7][8] = 'B';
	//main game loop
	do
	{
		printBoard(board);
		cout<<"Next move:  ";
		cin>>input;
		cout<<endl;
		switch(input)
		{
		case 'a':
			move(board,'P',Prow, Pcol - 1);
			break;
		case 'w':
			move(board,'P',Prow - 1, Pcol);
			break;
		case 's':
			move(board,'P',Prow + 1, Pcol);
			break;
		case 'd':
			move(board,'P',Prow, Pcol + 1);
			break;
		}
		printBoard(board);
	}while((dotCount > 0) && (livesLeft > 0));
}
pogrady (677)
Not all control paths return a value in isWall(...). If its a wall it returns true, other wise it returns something. I say this because essentially something in terms of bool is true.

also, pacman clones himself and doesn't move more then one space.

You might want to consider keeping track of the last position he was in.
Angeljruiz (187)
Pass in &board in all your move functions. When you just pass board it just makes a reference of it(a copy), not the actual board i think
Last edited on
whitenite1 (1785)
@yoked88

I changed up the program a bit. Now when you enter the direction, first a check to IsWall is done. If no wall s found in the direction of movement, then a blank is sent to erase the current location, location in grid is updated and your new position is the shown. IsWall also sends back true or false.

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// PacMan.cpp : main project file.

#include <iostream>
#include <string>
#include <iomanip>
#include <cstdlib>

using namespace std;

void instructions();
void playGame();
void initialize(char[][17]);
void printBoard(char[][17]);
//moving object class functions, class excluded for simplicity
bool isWall(char[][17],int,int);
void move_up(char[][17],char,int,int);
void move_down(char[][17],char,int,int);
void move_left(char[][17],char,int,int);
void move_right(char[][17],char,int,int);
bool didCollide(char);


int main()
{
	int menuChoice = 9;
	do
	{
		cout<<"Welcoe to the Pac-Man game!\n";
		cout<<"To read the rules, enter 1.\n";
		cout<<"To play the game, enter 2.\n";
		cout<<"To exit, enter 0.\n";
		cin>>menuChoice;
		if(!cin)
		{
			cin.clear();
			cin.ignore(200, '\n');
			cout<<"\n\nInvalid input found, game restarting.\n\n\n";
			menuChoice = 9;
		}
		switch(menuChoice)
		{
		case 1:
			instructions();
			break;
		case 2:
			playGame();
			break;
		case 0:
			break;
		}
	}while(menuChoice != 0);
	return 0;
}

void instructions()
{
	cout<<"\nPac man, represented by P, has only one goal and that is\n";
	cout<<"to eat all the dots.  Ghosts will be chasing you along the way\n";
	cout<<"trying to stop you (B - blinky, C - clyde, I - inky, K - pinky),\n";
	cout<<"don't run into them!.  You can also eat a power dot (+) which makes\n";
	cout<<"the ghosts edible for Pac man.  Use w, a, s, d, to move.\n";
	cout<<"Good luck and happy eating!\n\n";
}

void initialize(char board[][17])
{
	int row, col;
	for(row = 0; row < 17; row++)
		for(col = 0; col < 17; col++)
			board[row][col] = '*';

	//create walls and borders
	for(row = 0; row < 17; row ++)
	{
		board[row][0] = 'X';
		board[row][16] = 'X';
		board[0][row] = 'X';
		board[16][row] = 'X';
	}
	board[1][1] = '+'; board[1][15] = '+'; board[15][1] = '+', board[15][15] = '+';
	board[1][5] = 'X'; board[1][11] = 'X'; board[2][2] = 'X';
	board[2][3] = 'X'; board[2][5] = 'X'; board[2][7] = 'X';
	board[2][8] = 'X'; board[2][9] = 'X'; board[2][11] = 'X';
	board[2][13] = 'X'; board[2][14] = 'X'; board[3][2] = 'X';
	board[3][3] = 'X'; board[3][13] = 'X'; board[3][14] = 'X';
	board[4][4] = 'X'; board[4][6] = 'X'; board[4][7] = 'X';
	board[4][8] = 'X'; board[4][9] = 'X'; board[4][10] = 'X';
	board[4][12] = 'X'; board[5][2] = 'X'; board[5][14] = 'X';
	board[6][2] = 'X'; board[6][4] = 'X'; board[6][6] = 'X';
	board[6][8] = 'X'; board[6][10] = 'X'; board[6][12] = 'X';
	board[6][14] = 'X'; board[7][2] = 'X'; board[7][4] = 'X';
	board[7][6] = 'X'; board[7][10] = 'X'; board[7][12] = 'X';
	board[7][14] = 'X'; board[8][2] = 'X'; board[8][4] = 'X';
	board[8][6] = 'X'; board[8][8] = '@'; board[8][10] = 'X';
	board[8][12] = 'X'; board[8][14] = 'X'; board[9][2] = 'X';
	board[9][4] = 'X'; board[9][6] = 'X'; board[9][10] = 'X';
	board[9][12] = 'X'; board[9][14] = 'X'; board[11][1] = 'X';
	board[11][3] = 'X'; board[11][5] = 'X'; board[11][6] = 'X';
	board[11][7] = 'X'; board[11][8] = 'X'; board[11][9] = 'X';
	board[11][10] = 'X'; board[11][11] = 'X'; board[11][13] = 'X';
	board[11][15] = 'X'; board[12][1] = 'X'; board[12][3] = 'X';
	board[12][13] = 'X'; board[12][15] = 'X'; board[13][5] = 'X';
	board[13][6] = 'X'; board[13][7] = 'X'; board[13][9] = 'X';
	board[13][10] = 'X'; board[13][11] = 'X'; board[14][2] = 'X';
	board[14][3] = 'X'; board[14][7] = 'X'; board[14][9] = 'X';
	board[14][13] = 'X'; board[14][14] = 'X'; board[15][5] = 'X';
	board[15][11] = 'X';
}

void printBoard(char board[][17])
{
	int row, col;
	cout<<endl;
	for(row = 0; row < 17; row++)
	{
		for(col = 0; col < 17; col++)
		{
			cout<<setw(2)<<board[row][col];
		}
		cout<<endl;
	}
	cout<<endl;
}

//moving object class functions, class excluded for simplicity
bool isWall(char board[][17], int row, int col)
{
	bool wall = false;
	if(board[row][col] == 'X')
		wall = true;
	
	return wall;
}

void move_up(char board[][17], char object, int row, int col)
{
	board[row][col] = ' ';
	board[row--][col] = object;
}

void move_down(char board[][17], char object, int row, int col)
{
	board[row][col] = ' ';
	board[row++][col] = object;
}

void move_left(char board[][17], char object, int row, int col)
{
	board[row][col] = ' ';
	board[row][col--] = object;
}

void move_right(char board[][17], char object, int row, int col)
{
	board[row][col] = ' ';
	board[row][col++] = object;
}

bool didCollide(char object)
{
	if(object == 'P')
		return true;
}

//main game loop functions
void playGame()
{           
	//win loss variables          player location
	int dotCount = 147, livesLeft = 2, Prow = 12, Pcol = 8;
	//blinky location    clyde location
	int Brow = 7, Bcol = 8, Crow = 7, Ccol = 8;
	//inky location     pinky location
	int Irow = 7, Icol = 8, Krow = 7, Kcol = 8;
	char board[17][17];
	char input;
	bool wall;
	char blinky = 'B', clyde = 'C', inky = 'I', pinky = 'K', player = 'P';
	//blinky chases, pinky ambushes, inky is unpredictable, clyde is slow
	initialize(board);
	board[12][8] = 'P';
	board[7][8] = 'B';
	//main game loop
	do
	{
		cin.clear();
		cin.ignore(200, '\n');
		printBoard(board);
		cout<<"Next move:  ";
		cin>>input;
		cout<<endl;
		switch(input)
		{
		case 'a':
			wall = isWall(board,Prow,Pcol-1);
			if(!wall)
			{
				move_left(board,' ',Prow, Pcol);
				Pcol--;
				move_left(board,'P',Prow, Pcol);
			}
			break;
		case 'w':
			wall = isWall(board,Prow-1,Pcol);
			if(!wall)
			{
				move_up(board,' ',Prow, Pcol);
				Prow--;
				move_up(board,'P',Prow, Pcol);
			}
			break;
		case 's':
			wall = isWall(board,Prow+1,Pcol);
			if(!wall)
			{
				move_down(board,' ',Prow, Pcol);
				Prow++;
				move_down(board,'P',Prow, Pcol);
			}
			break;
		case 'd':
			wall = isWall(board,Prow,Pcol+1);
			if(!wall)
			{
				move_right(board,' ',Prow, Pcol);
				Pcol++;
				move_right(board,'P',Prow, Pcol);
			}
			break;
		}
		printBoard(board);
	}while((dotCount > 0) && (livesLeft > 0));
}
yoked88 (140)
Thank you all for the replies, all help is appreciated.

@whitenite1
Your code looks good, would you mind if I use it if I cannot get mine orking properly? I changed board to a global variable (I know, I know) just because this program is so small and now I cannot get a space inserted at the previous location because my compiler tells me it's trying to convert from char to constant char, but I don't see how because if you comment out the swith function inside of move(), the board initializes and prints just fine.
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#include <iostream>
#include <string>
#include <iomanip>
#include <cstdlib>

using namespace std;

char board[17][17];

void instructions();
void playGame();
void initialize();
void printBoard();
//moving object class functions, class excluded for simplicity
bool isWall(int,int);
void move(char,char,int,int);
bool didCollide(char);


int main()
{
	int menuChoice = 9;
	do
	{
		cout<<"Welcoe to the Pac-Man game!\n";
		cout<<"To read the rules, enter 1.\n";
		cout<<"To play the game, enter 2.\n";
		cout<<"To exit, enter 0.\n";
		cin>>menuChoice;
		if(!cin)
		{
			cin.clear();
			cin.ignore(200, '\n');
			cout<<"\n\nInvalid input found, game restarting.\n\n\n";
			menuChoice = 9;
		}
		switch(menuChoice)
		{
		case 1:
			instructions();
			break;
		case 2:
			playGame();
			break;
		case 0:
			break;
		}
	}while(menuChoice != 0);
	return 0;
}

void instructions()
{
	cout<<"\nPac man, represented by P, has only one goal and that is\n";
	cout<<"to eat all the dots.  Ghosts will be chasing you along the way\n";
	cout<<"trying to stop you (B - blinky, C - clyde, I - inky, K - pinky),\n";
	cout<<"don't run into them!.  You can also eat a power dot (+) which makes\n";
	cout<<"the ghosts edible for Pac man.  Use w, a, s, d, to move.\n";
	cout<<"Good luck and happy eating!\n\n";
}

void initialize()
{
	int row, col;
	for(row = 0; row < 17; row++)
		for(col = 0; col < 17; col++)
			board[row][col] = '*';

	//create walls and borders
	for(row = 0; row < 17; row ++)
	{
		board[row][0] = 'X';
		board[row][16] = 'X';
		board[0][row] = 'X';
		board[16][row] = 'X';
	}
	board[1][1] = '+'; board[1][15] = '+'; board[15][1] = '+', board[15][15] = '+';
	board[1][5] = 'X'; board[1][11] = 'X'; board[2][2] = 'X';
	board[2][3] = 'X'; board[2][5] = 'X'; board[2][7] = 'X';
	board[2][8] = 'X'; board[2][9] = 'X'; board[2][11] = 'X';
	board[2][13] = 'X'; board[2][14] = 'X'; board[3][2] = 'X';
	board[3][3] = 'X'; board[3][13] = 'X'; board[3][14] = 'X';
	board[4][4] = 'X'; board[4][6] = 'X'; board[4][7] = 'X';
	board[4][8] = 'X'; board[4][9] = 'X'; board[4][10] = 'X';
	board[4][12] = 'X'; board[5][2] = 'X'; board[5][14] = 'X';
	board[6][2] = 'X'; board[6][4] = 'X'; board[6][6] = 'X';
	board[6][8] = 'X'; board[6][10] = 'X'; board[6][12] = 'X';
	board[6][14] = 'X'; board[7][2] = 'X'; board[7][4] = 'X';
	board[7][6] = 'X'; board[7][10] = 'X'; board[7][12] = 'X';
	board[7][14] = 'X'; board[8][2] = 'X'; board[8][4] = 'X';
	board[8][6] = 'X'; board[8][8] = '@'; board[8][10] = 'X';
	board[8][12] = 'X'; board[8][14] = 'X'; board[9][2] = 'X';
	board[9][4] = 'X'; board[9][6] = 'X'; board[9][10] = 'X';
	board[9][12] = 'X'; board[9][14] = 'X'; board[11][1] = 'X';
	board[11][3] = 'X'; board[11][5] = 'X'; board[11][6] = 'X';
	board[11][7] = 'X'; board[11][8] = 'X'; board[11][9] = 'X';
	board[11][10] = 'X'; board[11][11] = 'X'; board[11][13] = 'X';
	board[11][15] = 'X'; board[12][1] = 'X'; board[12][3] = 'X';
	board[12][13] = 'X'; board[12][15] = 'X'; board[13][5] = 'X';
	board[13][6] = 'X'; board[13][7] = 'X'; board[13][9] = 'X';
	board[13][10] = 'X'; board[13][11] = 'X'; board[14][2] = 'X';
	board[14][3] = 'X'; board[14][7] = 'X'; board[14][9] = 'X';
	board[14][13] = 'X'; board[14][14] = 'X'; board[15][5] = 'X';
	board[15][11] = 'X';
}

void printBoard()
{
	int row, col;
	cout<<endl;
	for(row = 0; row < 17; row++)
	{
		for(col = 0; col < 17; col++)
		{
			cout<<setw(2)<<board[row][col];
		}
		cout<<endl;
	}
	cout<<endl;
}

//moving object class functions, class excluded for simplicity
bool isWall(int row, int col)
{
	if(board[row][col] == 'X')
		return true;
	return false;
}

void move(char object, char input, int row, int col)
{
	char temp;
	bool wall = isWall(row,col);
	if(wall == false)
	{
		switch(input)
		{
		case 'a':
			if(object == 'P')
			{
				board[row][col] = 'P';
				board[row][col + 1] = " ";
			}
			break;
		case 'w':
			if(object == 'P')
			{
				board[row][col] = 'P';
				board[row + 1][col] = " ";
			}
			break;
		case 's':
			if(object == 'P')
			{
				board[row][col] = 'P';
				board[row - 1][col] = " ";
			}
			break;
		case 'd':
			if(object == 'P')
			{
				board[row][col] = 'P';
				board[row][col - 1] = " ";
			}
			break;
		}
	}
}

bool didCollide(char object)
{
	if(object == 'P')
		return true;
	return false;
}

//main game loop functions
void playGame()
{           
	        //win loss variables          player location
	int dotCount = 147, livesLeft = 2, Prow = 12, Pcol = 8;
           //blinky location    clyde location
	int Brow = 7, Bcol = 8, Crow = 7, Ccol = 8;
	      //inky location     pinky location
	int Irow = 7, Icol = 8, Krow = 7, Kcol = 8;
	char input;
	bool wall;
	char blinky = 'B', clyde = 'C', inky = 'I', pinky = 'K', player = 'P';
	//blinky chases, pinky ambushes, inky is unpredictable, clyde is slow
	initialize();
	board[12][8] = 'P';
	board[7][8] = 'B';
	//main game loop
	do
	{
		printBoard();
		cout<<"Next move:  ";
		cin>>input;
		cout<<endl;
		switch(input)
		{
		case 'a':
			move('P', 'a', Prow, Pcol - 1);
			break;
		case 'w':
			move('P', 'w', Prow - 1, Pcol);
			break;
		case 's':
			move('P', 's', Prow + 1, Pcol);
			break;
		case 'd':
			move('P', 'd', Prow, Pcol + 1);
			break;
		}
		printBoard();
	}while((dotCount > 0) && (livesLeft > 0));
}
whitenite1 (1785)
@yoked88

No, I don't mind at all. It seems like an interesting project, too. I've already changed the program to use the arrow keys, instead of the a,s,d and w. I find it a lot easier to determine the directions that way. Also I have it to print out always in the same location, instead of scrolling, with a gotoXY() function. Easier on the eyes when the motion is fluid.
Would really like to see how you have the ghosts to move onscreen. You can PM me the file, if you would like.

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