Puzzle 2D9

Add two arrays together to fill in the elements of a third array

[E-6] Write a function that adds corresponding elements of two arrays to form the values for elements of a third array. All three arrays must be the same size and the third array must already exist.

void  add2DArrays( int rows, int cols, int x[rows][cols] , 
                   int y[rows][cols],  int sum[rows][cols]   )
{
 
 
}

Unlike Java and other object-oriented languages, C functions typically change the values of already-existing things (like arrays). The above function expects that main storage for all three arrays has already been allocated. If it has not, strange things will happen.