tree_use_case.cpp

 // Online C++ compiler to run C++ program online

#include <iostream>

#include <vector>

using namespace std;

template <typename T>

class TreeNode {

    public:

    T data;

    vector<TreeNode<T>*> children;

    

    TreeNode(T data){

        this->data=data;

    }

};

void printTree(TreeNode<int>* root){

    

    if (root==NULL){

        return;

    }

    cout<<root->data<<":";

    for (int i=0;i<root->children.size();i++){

        cout<<root->children[i]->data<<",";

    }

    cout<<endl;

    for (int i=0;i<root->children.size();i++){

        printTree(root->children[i]);

    }

}

int main(){

    TreeNode <int>* root = new TreeNode<int>(1);

    TreeNode <int>* node1 = new TreeNode<int>(2);

    TreeNode <int>* node2 = new TreeNode<int>(3);

    root->children.push_back(node1);

    root->children.push_back(node2);

    

    printTree(root);

}