c++ - Incompatible Pointer type while making binary search tree -

here code. trying insert in binary search tree , address pointers when getting bigger data node going left , vice versa

getting error: c:\users\huf\documents\tree.c|26|error: request member `right' in not structure or union|

#include <stdio.h>  struct node {     struct node*left;     int data;     struct node *right; };  void maketree(struct node **root1, int data1) {     if((*root1) == null)     {         (*root1) = (struct node *)malloc(sizeof(struct node));          (*root1)->data = data1;         (*root1)->left = null;         (*root1)->right = null;         //printf("%d %d",(*root1)->data,data1);     }     else if(data1 > ((*root1)->data))     {         printf("%d ", (*root1)->data);          maketree((*root1)->right,data1);     }      else if(data1 < (*root1)->data)     {         maketree((*root1)->left,data1);         printf("%d ", (*root1)->data);     }  }  int main() {  struct node * root = null; //int data; //data = 5; maketree(&root,12); maketree(&root,5); maketree(&root,9); maketree(&root,8); maketree(&root,16); maketree(&root,10);  return 0; } 

why getting incompatible pointer type.

ths problem in line maketree((*root1)->right,data1);. there must struct node **root1 (see parameters of function maketree()), actual parameter struct node *.

try put line: maketree(&(*root1)->right,data1); (and same 'left' few lines lower).