Tìm giúp lỗi ? sao mà k chạy đc?

Chuyển biểu thức trung tố thành tiền tố sử dụng cây nhị phân !
code =>:unamused:

#include <stdio.h>
#include <stdlib.h>
#include <conio.h>
#include <malloc>

typedef char DataType;
typedef struct Node
{
	DataType data;
	struct Node* left;
	struct Node* right;
};
typedef Node* Tree;

void MakeNullTree(Tree &T)
{
	T=NULL;
}

int EmptyTree(Tree T)
{
	return(T==NULL);
}

Tree LeftChild(Tree T)
{
	if(T->left !=NULL)
		return T->left;
	else 
		return NULL;
}

Tree RightChild(Tree T)
{
	if(T->right !=NULL)
		return T->right;
	else 
		return NULL;
}


Tree Create(DataType v; left l; right r)
{
	Tree N = (Tree)malloc(sizeof(Node));
	N->data = v;
	N->left = l;
	N->right = r;
}

void InOrder(Tree T)
{
	if(!EmptyTree(T))
	{
		InOrder(LeftChild(T));
		printf("%c ",T->data);
		InOrder(RightChild(T));
	}
}

void PreOrder(Tree T)
{
	if(!EmptyTree(T))
	{
		printf("%c ",T->data);
		PreOrderOrder(LeftChild(T));
		PreOrderOrder(RightChild(T));
	}
}

int main()
{
	Tree a = Create('a', NULL, NULL);
	Tree b = Create('b', NULL, NULL);
	Tree c = Create('c', NULL, NULL);
	Tree d = Create('d', NULL, NULL);
	Tree e = Create('e', NULL, NULL);
	Tree + = Create('+', a, b);
	Tree * = Create('*', +, c);
	Tree / = Create('/', d, e);
	Tree - = Create('-', *, /);
	
	printf("Bieu thuc trung to la: ");
	InOrder(a);
	
	printf("
Bieu thuc tien to la: ");
	PreOrder(a);
	
	return 0;
}