Modify the DeleteNode function so that it uses the immediate successor (rather than the predecessor) of the value to be deleted in the case of deleting a node with two children. You should call the function PtrToSuccessor that you wrote in Exercise 21.

Exercise 21

Write a function called PtrToSuccessor that finds a node with the smallest key value in a tree, unlinks it from the tree, and returns a pointer to the unlinked node.