C program to find the height of a binary search tree

Question:Write a C program to find the depth or height of a binary tree

Solution:
#include<stdio.h>

struct binarysearchtree
{
       int data;
       struct binarysearchtree* left;
       struct binarysearchtree* right;
};
typedef struct binarysearchtree* tree;

int max(int a,int b)
{
       if(a >=b)
               return a;
       else
               return b;
}

int height(tree T)
{
  if(T==NULL)
       return 0;
  else
  {
       int h1=height(T->left);
       int h2=height(T->right);
       return 1+max(h1,h2);
  }
}

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