Answer to Question #285125 in C++ for Zeck

Question

Suppose you are playing a killing game and have to kill few of your enemies. You are at a

cliff and from there you can see few of them. You see the enemies at your height only.

Therefore, you can only kill at the same height. The enemies are forming a balanced binary

tree where their General is at the top of the other cliff, his two commanders are on the first

level below him. The soldiers are at the lowest level. Total four soldiers are appointed. Under

both the commanders exact two soldiers serve.

You have to make a strategy to kill the left commander first, than whoever takes his position

kill him. Now start killing the right side with same strategy until only one enemy is left at left

side. Now increase your height and kill the General. You can only win if only three of your

enemies are left.

Display the enemies who are left and who have been killed. Don’t forget to print your victory

message.

Answer 1

#include<iostream>
#include<string>

using namespace std;

struct Node
{
	string enemy;
	Node* left;
	Node*right;
	Node(string _enemy):enemy(_enemy),left(NULL),right(NULL){}
};

class EnemyTree
{
public:
	Node* Head=NULL;
	int KillEnemy(string name, int& level)
	{
		if (Head->enemy == name&&level==3)
		{
			if (Head->left == NULL&&Head->right == NULL)
			{
				cout << Head->enemy<<" is killed!"
					<< "You are winner in a game";
				delete Head;
				Head = NULL;
				return -1;
			}
			else
			{
				if (level == 3)
				{
					cout << "Incorrect enemy!";
				}
				else
					cout << "You must killed another enemies before general!";
			}
		}
		else if(level==2)
		{
			if (Head->left&&Head->left->enemy == name)
			{
				if (Head->left->left == NULL&&Head->left->right == NULL)
				{
					delete Head->left;
					Head->left = NULL;
				}
			}
			else if(Head->right&&Head->right->enemy == name)
			{
				if (Head->right->left == NULL&&Head->right->right == NULL)
				{
					delete Head->right;
					Head->right = NULL;
				}
			}
			else
			{
				cout << "Incorrect enemy!\n";
			}
			if (Head->left == NULL&&Head->right == NULL)
				level++;
		}
		else if(level==1)
		{
			if (Head->left->left&&Head->left->left->enemy == name)
			{
				delete Head->left->left;
				Head->left->left = NULL;
			}
			else if (Head->left->right&&Head->left->right->enemy == name)
			{
				delete Head->left->right;
				Head->left->right = NULL;
			}
			else if (Head->right->left&&Head->right->left->enemy == name)
			{
				delete Head->right->left;
				Head->right->left = NULL;
			}
			else if (Head->right->right&&Head->right->right->enemy == name)
			{
				delete Head->right->right;
				Head->right->right = NULL;
			}
			else
				cout << "Incorrect enemy!\n";
			if (Head->left->left == NULL&&Head->left->right == NULL
				&&Head->right->left == NULL&&Head->right->right == NULL)
			{
				level++;
			}
			cout << "level= " << level << endl;
		
		}
		return 0;
	}
	void DisplayTree()
	{
		Node* p = Head;
		if (p != NULL)
			cout << "\t\t\t" << p->enemy << endl;
		else
		{
			return;
		}
		if (p->left != NULL || p->right != NULL)
		{
			cout << "\t" << (p->left ? p->left->enemy : "killed") << "\t\t"
				<< (p->right ? p->right->enemy : "killed") << endl;
		}
		else
		{
			cout << "\tkilled\t\tkilled\n";
		}
		if (p->left && (p->left->left != NULL || p->left->right != NULL))
		{
			cout << (p->left->left ? p->left->left->enemy : "killed") << "\t"
				<< (p->left->right ? p->left->right->enemy : "killed") << "\t\t";
		}
		else
		{
			cout << "killed\tkilled\t\t";
		}
		if (p->right && (p->right->left != NULL || p->right->right != NULL))
		{
			cout << (p->right->left ? p->right->left->enemy : "killed") << "\t"
				<< (p->right->right ? p->right->right->enemy : "killed") << endl;
		}
		else
		{
			cout << "killed\tkilled";
		}
	}
};

int main()
{
	//Make enemy tree
	EnemyTree et;
	et.Head = new Node("General");
	et.Head->left= new Node("Lcommander");
	et.Head->right = new Node("Rcommander");
	et.Head->left->left = new Node("LLsoldier");
	et.Head->left->right = new Node("LRsoldier");
	et.Head->right->left = new Node("RLsoldier");
	et.Head->right->right = new Node("RRsoldier");
	int level = 1;
	int res = 0;
	string enm;
	do
	{
		et.DisplayTree();
		cout << "\nPlease, enter an enemy to kill (0-exit program): ";
		cin >> enm;
		if (enm == "0")break;
		res=et.KillEnemy(enm,level);
	} while (res!=-1);
}