Creating an array using class in C++

[yue219]

Im having trouble with this one. I need to create a grid using class, but not sure how to write the code. Please i just need hints =]

   
        //array size for Template
        const int R = 4; 
        const int C = 3;

    //This is what the player sees upon starting the game.
    char Template[R][C];
    Template[0][0] = 'X';
    Template[0][1] = 'X';
    Template[0][2] = 'X';
    Template[1][0] = 'X';
    Template[1][1] = 'X';
    Template[1][2] = 'X';
    Template[2][0] = 'X';
    Template[2][1] = 'X';
    Template[2][2] = 'X';
    Template[3][0] = 'X';
    Template[3][1] = 'X';
    Template[3][2] = 'X';

[sanYAua007]

Im having trouble with this one. I need to create a grid using class, but not sure how to write the code. Please i just need hints =]

Hello yue219!

You need something like this.

#include <iostream>
//-------------------------------------------------------   
class cGrid
{
  public:
     cGrid(int _r, int _c)   //Constructor
       :R(_r),C(_c)//Initialize dimensions
     {
        Template=new char*[R];
        for (int i=0; i<R; ++i)
        {
          Template[i]=new char[C];
          for (int j=0; j<C; ++j)
              Template[i][j]='X';
        } //Initializing array
     }
     ~cGrid() //Destructor
     {
        for (int i=0; i<R; ++i) delete[] Template[i];
        delete []Template; //Release heap memory   
    }
     int R;
     int C;
     char** Template;
};
//---------------------------------------------------------------------------
int main(int argc, char* argv[])
{
    cGrid myGrid(4,3);
    //You have an instance of cGrid, that contains three fields
    //int R - number of rows
    //int C- number of columns
    //char** Template - 2d array (R*C) each element of which equals 'X'
    //-----------------------------------------------------------------
    //To reach Template's elements use this code
    //myGrid.Template[i][j]
   //Code compiled in C++ Builder.
}

That's all. Good luck!

[yue219]

Hello yue219!

You need something like this.

#include <iostream>
//-------------------------------------------------------   
class cGrid
{
  public:
     cGrid(int _r, int _c)   //Constructor
       :R(_r),C(_c)//Initialize dimensions
     {
        Template=new char*[R];
        for (int i=0; i<R; ++i)
        {
          Template[i]=new char[C];
          for (int j=0; j<C; ++j)
              Template[i][j]='X';
        } //Initializing array
     }
     ~cGrid() //Destructor
     {
        for (int i=0; i<R; ++i) delete[] Template[i];
        delete []Template; //Release heap memory   
    }
     int R;
     int C;
     char** Template;
};
//---------------------------------------------------------------------------
int main(int argc, char* argv[])
{
    cGrid myGrid(4,3);
    //You have an instance of cGrid, that contains three fields
    //int R - number of rows
    //int C- number of columns
    //char** Template - 2d array (R*C) each element of which equals 'X'
    //-----------------------------------------------------------------
    //To reach Template's elements use this code
    //myGrid.Template[i][j]
   //Code compiled in C++ Builder.
}

That's all. Good luck!

Ohh thank you mucho =]