Untitled

#include<iostream>
#include<vector>
using namespace std;
class BinaryTree {
private:
    vector<int> treearray;
public:
    BinaryTree() {}

    void insert(int value) {
    treearray.push_back(value);
    }

    void displaypostorder(int index=0) {
        if(index<treearray.size()) {
        displaypostorder(2*index + 1);
        displaypostorder(2*index + 2);
        cout<<treearray[index]<<" ";
        }
    }

    void displayinorder(int index=0) {
        if(index<treearray.size()) {
        displayinorder(2*index + 1);
        cout<<treearray[index]<<" ";
        displayinorder(2*index + 2);

        }
    }



};
int main () {
    BinaryTree binaryTree;
    binaryTree.insert(40);
    binaryTree.insert(20);
    binaryTree.insert(30);
    binaryTree.insert(4);
    binaryTree.insert(5);

 cout<<" Binary Tree (Post-order): ";
 binaryTree.displaypostorder();
 cout<<endl;
 cout<<" Binary Tree (In-order): ";
 binaryTree.displayinorder();

 cout<<endl;

return 0;
}