arrow keys in arrays

This is a discussion on arrow keys in arrays within the C++ Programming forums, part of the General Programming Boards category; i got this code from the FAQ and i tried adopting it to my code i already had but i ...

  1. 03-04-2006 #1
    tunerfreak
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    arrow keys in arrays

    i got this code from the FAQ and i tried adopting it to my code i already had but i cant get it to work.

    basically what i need to do is i made a grid using ascii characters and i have to have a cursor move about that grid but my program always crashes when it gets to that part cause i know i did something wrong there

    here is all the code i have so far

    Code:
    #include <iostream>
#include <conio.h>
#include <windows.h> 
#include <stdio.h> 
#include "Definitions.h"
using namespace std;

enum
{
  KEY_ESC     = 27,
  ARROW_UP    = 256 + 72,
  ARROW_DOWN  = 256 + 80,
  ARROW_LEFT  = 256 + 75,
  ARROW_RIGHT = 256 + 77
};

static int get_code ( void )
{
  int ch = getch();

  if ( ch == 0 || ch == 224 )
    ch = 256 + getch();

  return ch;
}

class Darray{
protected:
		int DEPTH,
			  ROW,
			  COL;
		int*** array;

public:
	
	Darray();
	Darray(int depth, int row, int col);
	~Darray();
	Darray(const Darray& darray);						//copy constructor
	Darray& Darray::operator= (const Darray& darray);	//assignment operator

	void getDimensions(int DEPTH, int ROW, int COL);
	void destroy();
	void create();
	void init();
	void resetSize(int DEPTH, int ROW, int COL);
};

Darray::Darray()
{
	DEPTH=0;
	ROW=0;
	COL=0;
	array=NULL;
}

void Darray::create()
{
	array = new int** [DEPTH];
	for(int d=0; d<DEPTH; d++) {
		*(array+d) = new int* [ROW];
		for (int r=0; r<ROW; r++)
			*(*(array+d)+r) = new int [COL];
	}
}

Darray::Darray(int depth, int row, int col)
{
	DEPTH = depth;
	ROW = row;
	COL = col;
	create();
	init();

}

Darray::~Darray()
{
	destroy();
}

Darray::Darray(const Darray& darray)
{
	DEPTH = darray.DEPTH;
	ROW = darray.ROW;
	COL = darray.COL;
	create();

	for(int d=0; d<DEPTH; d++)
		for(int r=0; r<ROW; r++)
			for(int c=0; c<COL; c++)
				array[d][r][c] = darray.array[d][r][c];
}

Darray& Darray::operator= (const Darray& darray)
{
	resetSize(darray.DEPTH, darray.ROW, darray.COL);

	for(int d=0; d<DEPTH; d++)
		for(int r=0; r<ROW; r++)
			for(int c=0; c<COL; c++)
				array[d][r][c] = darray.array[d][r][c];
			
			return *this;	
}

void Darray::destroy()
{
	 for (int d=0; d<DEPTH; d++)
	 {
		 for(int r=0; r<ROW; r++)
			 delete [] *(*(array+d)+r);
		 delete [] *(array+d);
	 }
	 delete [] array;
 }


void Darray::init()
{
	for(int d=0; d<DEPTH; d++)
		for(int r=0; r<ROW; r++)
			for(int c=0; c<COL; c++)
				array[d][r][c] = 0;
}

void Darray::getDimensions(int DEPTH, int ROW, int COL)
{

	cout << "The Depth is: " << DEPTH << "  The Row is: " << ROW
		<< "  The Columns is: " << COL << endl;	
}

void Darray::resetSize(int depth, int row, int col)
{
	Darray temp (*this);
	destroy();
	DEPTH=depth;
	ROW=row;
	COL=col;
	create();
	init();
}

/***********************************************************************************/
class Grid : public Darray {
private:
	int currentRow,
		currentDepth,
		currentCol;

public:
	Grid();
	void arrow_keys();
	void UsFunction();
	void DsFunction();
	void clear_da_screen(void);
	void print () const;
};

Grid::Grid()
{
	int depth,
		row,
		col;


	cout << "Enter the grid dimensions: " << endl;
	cin >> depth >> row >> col;

	// set up dimensions
	DEPTH = depth;
	ROW = row;
	COL = col;

	// set up position
	currentRow = ROW / 2 + 1;
	currentDepth = DEPTH / 2 + 1;
	currentCol = COL / 2 + 1;

	create();

}

void Grid::print () const
{
	
	// makes grid

	//makes top row or grid
	for(int d=0; d<DEPTH; d++)
	{
			if(d<DEPTH)
			{				
					cout << U_L;
					cout << LINE;
			
				for(int c=0; c<COL-1; c++)
				{						
						cout << T_M;
						cout << LINE;
						
				}// end for
									
					cout << U_R;					
					cout << "\n";

					for( c=0; c<COL+1; c++)
					{

					cout << VERT_LINE;
					cout << " ";

					}// end vertical line first row

			}cout << "\n";// end top of grid

		// makes gird middle	
		for(int r=0; r<ROW-1; r++)		
			if(r<ROW)
			{
				cout << L_SM;
				cout << LINE;
		
				for(int c=0; c<COL-1; c++)
					{
						
						cout << M;
						cout << LINE;
					}// end for
				
				
				cout << R_SM;
				cout << "\n";

				for( c=0; c<COL+1; c++)
				{
					cout << VERT_LINE;
					cout << " ";
				}cout << endl;
			}// end middle of grid
			
			// makes last line
			if(d<DEPTH)
			{
				
				cout << L_L;
				cout << LINE;

				for(int c=0; c<COL-1; c++)
					{						
						cout << L_MT;
						cout << LINE;				
					}
			
				cout << L_R;			
			}
			cout << endl;	
			
	}//end last row
	
	
}
void Grid::UsFunction()
{

		resetSize(DEPTH, ROW, COL);

			for(int d=0; d<DEPTH; d++)
				for(int r=0; r<ROW; r++)
					for(int c=0; c<COL; c++)
					{
						array[d][r][c] = array[currentDepth][currentRow][currentCol];
					}


}

void Grid::DsFunction()
{
	resetSize(DEPTH, ROW, COL);

		for(int d=0; d<DEPTH; d++)
				for(int r=0; r<ROW; r++)
					for(int c=0; c<COL; c++)
					{
						array[d][r][c] = array[currentDepth][currentRow][currentCol];
					}
}


void Grid::arrow_keys()
{



	 array[DEPTH][ROW][COL];
    for(int d=0; d<DEPTH; d++)
    {
        for(int r=0; r<ROW; r++)
        {
			for(int c=0; c<COL; c++)
			{
            array[d][r][c]=' ';
			}
        }
    }   
  
	print();
  
  int d,r,c;
  d=0;
  r=0;
  c=0;
  
    
  int ch;

  while ( ( ch = get_code() ) != KEY_ESC ) {
     // clear_da_screen();
    switch ( ch ) 
    {
    case ARROW_UP:
      //printf ( "UP\n" );
      c=c-1;
      break;
    case ARROW_DOWN:
      //printf ( "DOWN\n" );
      c=c+1;
      break;
    case ARROW_LEFT:
      //printf ( "LEFT\n" );
      r=r-1;
      break;
    case ARROW_RIGHT:
      //printf ( "RIGHT\n" );
      r=r+1;
      break;
      
    
    }
    
    array[c][r][d]=ACTIVE;
       for(int d=0; d<DEPTH; d++)
      {
        for(int r=0; r<ROW; r++)
        {
			for(int c=0; c<COL; c++)
			{
            cout<<array[d][r][c]<<"";
			}
        }cout<<"\n";
      } 
      array[c][r][d]=VISIT;
      //break;
      
      
      
  }      
     
     cin.get();
     cin.get(); 
} 

/*void Grid::clear_da_screen(void)
{
    COORD                       coordScreen = { 0, 0 };
    DWORD                       cCharsWritten;
    CONSOLE_SCREEN_BUFFER_INFO  csbi;
    DWORD                       dwConSize;
    HANDLE                      hConsole = GetStdHandle(STD_OUTPUT_HANDLE);
    GetConsoleScreenBufferInfo(hConsole, &csbi);
    dwConSize = csbi.dwSize.X * csbi.dwSize.Y;
    FillConsoleOutputCharacter(hConsole, TEXT(' '), 
                               dwConSize, coordScreen, &cCharsWritten);
    GetConsoleScreenBufferInfo(hConsole, &csbi);
    FillConsoleOutputAttribute(hConsole, csbi.wAttributes, 
                               dwConSize, coordScreen, &cCharsWritten);
    SetConsoleCursorPosition(hConsole, coordScreen);
}
*/
/******************************************************************************/
class Cell{
	private:
		 bool visit,
			 active;

	public:
		Cell();
		~Cell();
		void fill();

};

Cell::Cell()
{
	visit = 0;
	active = 0;
}

Cell::~Cell()
{

}
//fill cell when visited
void Cell::fill()
{

}


/*******************************************************************************/
void main()
{
	

	//Darray d;
	Grid g;
	Cell c;
	//d.getDimensions(depth, row, col);

	
	g.arrow_keys();
	g.print();

}
    here is my definitions file:

    Code:
    #define M char (197);
#define U_L char (218);
#define L_L char (192);
#define U_R char (191);
#define L_R char (217);
#define T_M char (194);
#define L_MT char (193);
#define L_SM char (195);
#define R_SM char (180);
#define VERT_LINE char (179);
#define VISIT char (219);
#define LINE  char (196);
#define ACTIVE char (248);
    what is it that im doing wrong i have never done this before
  2. 03-04-2006 #2
    tunerfreak
    tunerfreak is offline
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    here is the function it is in so i dont have to search for it

    Code:
    void Grid::arrow_keys()
{



	 array[DEPTH][ROW][COL];
    for(int d=0; d<DEPTH; d++)
    {
        for(int r=0; r<ROW; r++)
        {
			for(int c=0; c<COL; c++)
			{
            array[d][r][c]=' ';
			}
        }
    }   
  
	print();
  
  int d,r,c;
  d=0;
  r=0;
  c=0;
  
    
  int ch;

  while ( ( ch = get_code() ) != KEY_ESC ) {
     // clear_da_screen();
    switch ( ch ) 
    {
    case ARROW_UP:
      //printf ( "UP\n" );
      c=c-1;
      break;
    case ARROW_DOWN:
      //printf ( "DOWN\n" );
      c=c+1;
      break;
    case ARROW_LEFT:
      //printf ( "LEFT\n" );
      r=r-1;
      break;
    case ARROW_RIGHT:
      //printf ( "RIGHT\n" );
      r=r+1;
      break;
      
    
    }
    
    array[c][r][d]=ACTIVE;
       for(int d=0; d<DEPTH; d++)
      {
        for(int r=0; r<ROW; r++)
        {
			for(int c=0; c<COL; c++)
			{
            cout<<array[d][r][c]<<"";
			}
        }cout<<"\n";
      } 
      array[c][r][d]=VISIT;
      //break;
      
      
      
  }      
     
     cin.get();
     cin.get(); 
}
  3. 03-05-2006 #3
    WaltP
    WaltP is offline
    Been here, done that.
    Join Date
    May 2003
    Posts
    1,156
    Quote Originally Posted by tunerfreak
    here is my definitions file:

    Code:
    #define M char (197);
#define U_L char (218);
#define L_L char (192);
#define U_R char (191);
#define L_R char (217);
#define T_M char (194);
#define L_MT char (193);
#define L_SM char (195);
#define R_SM char (180);
#define VERT_LINE char (179);
#define VISIT char (219);
#define LINE  char (196);
#define ACTIVE char (248);
    what is it that im doing wrong i have never done this before
    Try
    Code:
    #define M 197
#define U_L 218
#define L_L 192
#define U_R 191
etc...
    #define replaces everything after the name in the code so each time you used R_SM, you really added to the code char (180);. Both char and ; are causing your problems.
    Definition: Politics -- Latin, from
    poly meaning many and
    tics meaning blood sucking parasites
    -- Tom Smothers
  4. 03-05-2006 #4
    tunerfreak
    tunerfreak is offline
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    no i need thoes parentheses i get errors if they are not there. but i took out the ' ; ' though and its fine but it still crashes when i hit the arrow keys.
    Last edited by tunerfreak; 03-05-2006 at 07:17 AM.
  5. 03-05-2006 #5
    tunerfreak
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    is it because i have an int array and im making it equal to ACTIVE and VISIT which is a char
  6. 03-06-2006 #6
    tunerfreak
    tunerfreak is offline
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    i figured out how to get the arrow keys to work but no how to i print the cursors to move around.

    this is my attempt at doig it but i am gettint 90 some errors can u help me out here

    redone grid class

    Code:
    class Grid : public Darray {
private:
	int currentRow,
		currentDepth,
		currentCol;
	bool visit,
		active;

public:
	Grid();
	void arrow_keys();
	void UsFunction();
	void DsFunction();
	void clear_screen(void);
	void print () const;
	void A();
	void V();
	void setact(bool act) {this->active = act;} 
	void setvis(bool vis) {this->visit = vis;}
	void setpoint();
};

Grid::Grid()
{
	int depth,
		row,
		col;


	cout << "Enter the grid dimensions: " << endl;
	cin >> depth >> row >> col;

	// set up dimensions
	DEPTH = depth;
	ROW = row;
	COL = col;

	// set up position
	currentRow = ROW / 2 + 1;
	currentDepth = DEPTH / 2 + 1;
	currentCol = COL / 2 + 1;

	create();

}


void Grid::print () const
{
	
	// makes grid

	//makes top row or grid
	for(int d=0; d<DEPTH; d++)
	{
			if(d<DEPTH)
			{				
					cout << U_L;
					cout << LINE;
			
				for(int c=0; c<COL-1; c++)
				{						
						cout << T_M;
						cout << LINE;
						
				}// end for
									
					cout << U_R;					
					cout << "\n";

					for( c=0; c<COL+1; c++)
					{

					cout << VERT_LINE;
					cout << " ";

					}// end vertical line first row

			}cout << "\n";// end top of grid

		// makes gird middle	
		for(int r=0; r<ROW-1; r++)		
			if(r<ROW)
			{
				cout << L_SM;
				cout << LINE;
		
				for(int c=0; c<COL-1; c++)
					{
						
						cout << M;
						cout << LINE;
					}// end for
				
				
				cout << R_SM;
				cout << "\n";

				for( c=0; c<COL+1; c++)
				{
					cout << VERT_LINE;
					cout << " ";
				}cout << endl;
			}// end middle of grid
			
			// makes last line
			if(d<DEPTH)
			{
				
				cout << L_L;
				cout << LINE;

				for(int c=0; c<COL-1; c++)
					{						
						cout << L_MT;
						cout << LINE;				
					}
			
				cout << L_R;			
			}
			cout << endl;	
			
	}//end last row
	
	
}

void Grid::UsFunction()
{

		resetSize(DEPTH, ROW, COL);

			COL = COL + 2;
			ROW = ROW + 2;


}

void Grid::DsFunction()
{
	resetSize(DEPTH, ROW, COL);

		for(int d=0; d<DEPTH; d++)
				for(int r=0; r<ROW; r++)
					for(int c=0; c<COL; c++)
					{
						array[d][r][c] = array[currentDepth][currentRow-2][currentCol-2];
					}
}



void Grid::A()
{
		array[currentDepth][currentRow][currentCol] = setact(this->true);
		array[currentDepth][currentRow][currentCol] = setpoint(ACTIVE);
		array[currentDepth][currentRow][currentCol] = setvis(this->false);
}

void Grid::V()
{
		array[currentDepth][currentRow][currentCol] = setact(this->false);
		array[currentDepth][currentRow][currentCol] = setpoint(VISIT);
		array[currentDepth][currentRow][currentCol] = setvis(this->true);
}



void Grid::arrow_keys()
{
  
    
  int ch;

  while ( ( ch = get_code() ) != KEY_ESC ) {
      clear_screen();
	  print();
    switch ( ch ) 
    {
    case ARROW_UP:
      printf ( "UP\n" );
			
	  if((currentRow = currentRow-1 >= 0))
	{
		A();
		currentRow = currentRow - 1;
		V();
	}
	  else if((currentRow = currentRow-1 < 0))
	{
		A();
		currentRow = currentRow - 1;
		V();
	}
			  
      break;

    case ARROW_DOWN:
      printf ( "DOWN\n" );

		if(( currentRow = currentRow + 1 <= ROW-1 ))
	{
		A();
		currentRow = currentRow + 1;
		V();
	}
	else if((currentRow = currentRow + 1 >ROW-1 ))
	{
		A();
		currentRow = 0;
		V();
	}

      break;

    case ARROW_LEFT:
      printf ( "LEFT\n" );

	  if(( currentCol = currentCol - 1 <= COL-1 ))
	{
		A();
		currentCol = currentCol - 1;
		V();
	}
	else if((currentCol = currentCol - 1 > COL-1))
	{
		A();
		currentCol = 0;
		V();
	}
      
      break;

    case ARROW_RIGHT:
      printf ( "RIGHT\n" );
	  
	  if((currentCol = currentCol - 1 <= COL-1))
	{
		A();
		currentCol = currentCol - 1;
		V();
	}
	else if((currentCol = currentCol - 1 > COL - 1))
	{
		A();
		currentCol = 0;
		V();
	}
	  
      break;
      
    
    }
   
      
  }      
     
     cin.get();
     cin.get(); 

}

void Grid::clear_screen(void)
{
    COORD                       coordScreen = { 0, 0 };
    DWORD                       cCharsWritten;
    CONSOLE_SCREEN_BUFFER_INFO  csbi;
    DWORD                       dwConSize;
    HANDLE                      hConsole = GetStdHandle(STD_OUTPUT_HANDLE);
    GetConsoleScreenBufferInfo(hConsole, &csbi);
    dwConSize = csbi.dwSize.X * csbi.dwSize.Y;
    FillConsoleOutputCharacter(hConsole, TEXT(' '), 
                               dwConSize, coordScreen, &cCharsWritten);
    GetConsoleScreenBufferInfo(hConsole, &csbi);
    FillConsoleOutputAttribute(hConsole, csbi.wAttributes, 
                               dwConSize, coordScreen, &cCharsWritten);
    SetConsoleCursorPosition(hConsole, coordScreen);
}
    section of code that im talkin about

    Code:
    void Grid::A()
{
		array[currentDepth][currentRow][currentCol] = setact(this->true);
		array[currentDepth][currentRow][currentCol] = setpoint(ACTIVE);
		array[currentDepth][currentRow][currentCol] = setvis(this->false);
}

this is my attempt at getting the cursors goin

void Grid::V()
{
		array[currentDepth][currentRow][currentCol] = setact(this->false);
		array[currentDepth][currentRow][currentCol] = setpoint(VISIT);
		array[currentDepth][currentRow][currentCol] = setvis(this->true);
}
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