I just want to know how to write these functions:

void deleteMovieNode(std::string title); 

MovieNode* search(std::string title); 

MovieNode* treeMinimum(MovieNode *node); 

I got these three functions,

MovieNode* search(std::string title); 

MovieNode* treeMinimum(MovieNode *node); they are the helper function I think, and I tried to write these two like this: 

MovieNode* search(std::string title) 

{

MovieNode *foundMovie = root;

while(founMovie != NULL)

{

if(foundMovie->title > title)

{

foundMovie = foundMovie->leftChild;

}else if(foundMovie->title < title)

{

foundMovie = foundMovie->rightChild;

}

return foundMovie;

}

cout<<" Movie not found."<

return NULL;

}

MovieNode* treeMinimum(MovieNode *node) 

{

MovieNode *current = node;

while(current ->lefchild != NULL)

{

current = current->leftChild;

}

return current;

}

But I don't how to use these two to write deleteNode function(ps:if I writed wrong for those two functions,plz help me modify)

one thing I know is that, if i want to use search function;

I can do this:

MovieNode *foundMoive = search(title);