Question

How to dynamically allocate a two dimensional (2D) array in C++

Answer 1

#include <iostream>

int main(void) {
    int **arr = new int*[3]();
    
    for (int i = 0; i < 3; i++) {
        arr[i] = new int[4]();
    }
    
    for (int i = 0; i < 3; i++) {
        for (int j = 0; j < 4; j++) {
            std::cout << arr[i][j] << " ";
        }
        std::cout << "\n";
    }

    for (int i = 0; i < 3; i++) {
        delete[] arr[i];
    }
    delete[] arr;
}
 
 
 
 
/*
run:
 
0 0 0 0 
0 0 0 0 
0 0 0 0 
 
*/

 

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