C++ Triangular Array

C++

#include <iostream>

using namespace std;

int main(void)
{
	int rows = 5, cols = 5;
	int **arr;
	// allocate and initialize the array
	arr = new int * [rows];
	for (int r = 0; r < rows; r++) {
		arr[r] = new int[r + 1];
		for(int c = 0; c <= r; c++)
			arr[r][c] = (r + 1) * 10 + c + 1;
	}
	// print the array
	for(int r = 0; r < rows; r++) {
		for(int c = 0; c <= r; c++)
			cout << arr[r][c] << " ";
		cout << endl;
	}
	// free the array
	for(int r = 0; r < rows; r++)
		delete [] arr[r];
	delete [] arr;
	return 0;
}