c++ how to return 2d array code example

Example 1: filling 2d array with 0 c++

int a[x][y];
std::fill(a[0], a[0] + x * y, 0);

Example 2: how to print a 2d array in c++

for (int i = 0; i < m; i++) 
{ 
   for (int j = 0; j < n; j++) 
   { 
      cout << arr[i][j] << " "; 
   } 
     
   // Newline for new row 
   cout << endl; 
}