Swapping addresses of pointers in C++

Question

How can one swap pointer addresses within a function with a signature?

Let\'s say:

int weight, height;
void swap(int* a, int* b);

S

Answer 1

If you want to change address of pointers then you have to pass pointers of those pointers as your parameters:

void swap(int **a, int **b); //as prototype

Those examples are just changes values of pointers.