I am trying to pass an array of strings or a 2d array of chars to a function so I can modify them using that function. I have tired referencing, pointers e.t.c but all produce errors.

The function is expected to return the answer to the given problem which is the minimum cost of operations. Return only the min cost value and nothing more. The char**& box1 and char**& box2 variables ...

Return only the min cost value and nothing more. The char**& box1 and char**& box2 variables are the parameters which pass the input 2D array of boxes to your functions. Do not modify those arrays!