Question

How to initialize a dynamic two-dimensional array with values? (C++)

Here's my problem...

# include
using namespace std;

int main()
{

   // Q#5 - dynamic 2d arrays, indexing via subscript operator, pointer arithmetic

   // tic tac toe board is an array of int pointers
   // each int pointer in the board points to a row

   // declare a pointer to an array of int pointers (i.e. a pointer to a pointer of type int)

   const int SIZE = 3;

   int** p_p_tictactoe = new int* [SIZE];

   // ... // [5.1] row1: dynamically allocate int[SIZE], use initializer list to initialize to {1,0,0}

   // ... // [5.2] row2: dynamically allocate int[SIZE], use initializer list to initialize to {0,1,0}

   // ... // [5.3] row3: dynamically allocate int[SIZE], use initializer list to initialize to {0,0,1}

   cout << endl << endl;
   system("pause");
   return 0;
}

Answer 1

# include<iostream>

using namespace std;

int main()

{

   // Q#5 - dynamic 2d arrays, indexing via subscript operator, pointer arithmetic

   // tic tac toe board is an array of int pointers

   // each int pointer in the board points to a row

   // declare a pointer to an array of int pointers (i.e. a pointer to a pointer of type int)

   const int SIZE = 3;

   int** p_p_tictactoe = new int* [SIZE];//here rows are initialized

  

   // ... // [5.1] row1: dynamically allocate int[SIZE], use initializer list to initialize to {1,0,0}

p_p_tictactoe[0]=new int[SIZE]{1,0,0};//here first row created and initialized with values

   // ... // [5.2] row2: dynamically allocate int[SIZE], use initializer list to initialize to {0,1,0}

p_p_tictactoe[1]=new int[SIZE]{0,1,0};//here second row created and initialized with values

   // ... // [5.3] row3: dynamically allocate int[SIZE], use initializer list to initialize to {0,0,1}

p_p_tictactoe[2]=new int[SIZE]{0,0,1};//here third row created and initialized with values

   cout << endl << endl;

   system("pause");

   return 0;

}

what i lines bolded was entered by me

i completed the remaining rows and initialized the rows.

if you have any doubt please do comment