INORDER & POSTORDER TRAVERSING IN TREE PRACTICAL

#include<iostream> 
using namespace std; 
class inpost{ 
private: 
typedef struct tree 
{ 
int key; 
struct tree * left; 
struct tree * right; 
} Tree; 
public: 
int search(int [],int , int ,int ); 
void createTree(int [],int [],int ,int , int ); 
}; 

int inpost::search(int arr[],int left, int right,int key) 
{ 
int i; 
for(i=left; i <= right; i++) 
{ 
if( key == arr[i]) 
{ 
return i; 
} 
} 
return -1; 
} 

void inpost::createTree(int postorder[],int inorder[],int left,int right, int pos) 
{ 
if(left > right) 
return; 
else{ 
Tree *t = new tree; 
t->key = postorder[pos]; 
int index = search(inorder,left, right, t->key); 
cout<<"\n"<<t->key; 
//t->left  
createTree(postorder,inorder ,left,index-1, pos - 1- (right - index)); 
//t->right  
createTree(postorder,inorder,index +1, right, pos -1); 
} 
} 


int main(){ 
inpost ipp; 
int postorder[] = {4,1,3,10,11,8,2,7}; 
int inorder[] = {4,10,3,1,7,11,8,2}; 
ipp.createTree(postorder,inorder,0,7,7); 
}