Tutorial C++ #6: Ciclos For, Do, While.

// Prueba enupal.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include <iostream>
#include "conio.h"
#include <string>

using namespace std;

int main()
{
		int i = 0;
		int combinacion;

		// i++ 
		// i = i + 1; 	
		
		for (i = 0; i < 3; i++)
		{
				cout << "ingrese combinacion " << i + 1 << endl;
				cin >> combinacion;

				if (combinacion == 10)
				{
						cout << "abir puerta" << endl;
				}
		}

		do
		{

			cout << "ingrese combinacion " << i + 1 << endl;
			cin >> combinacion;

			if (combinacion == 10)
			{						
				cout << "abir puerta" << endl;
			}

			i = i + 1;

		} while (i < 3);


		while (i < 3)
		{
				cout << "ingrese combinacion " << i + 1 << endl;
				cin >> combinacion;

				if (combinacion == 10)
				{
						cout << "abir puerta" << endl;
				}

				i++;

		}

		_getch();
		return 0;
}