C++ question

now, the (refined and optimized) code works on my laptop but on the PC i get this ****ty
'cout' : undeclared identifier
'cin' : undeclared identifier

i dont have the source code from the laptop but im fairly certain its correct.

// crap.cpp : main project file.

#include <iostream>
#include <stdafx.h>


using namespace System;

int main()
{

int num, num2;

//ZOMG LOOP!
num = 1;
cout << "Enter a number bitch!";
cin >> num2;

while (num <= num2)
cout << "Fail " num;
num++;


return 0;
}

i know about the braces needed for the loop, and the for loops and how that can further optimize.

Do not correct the code! as i am just learning, i want to figure out the syntax/logic errors myself and will learn nothing if done for me.

i just want this cout error crap fixed.


(using visual C++ 2005)

you are not being very helpful

i have the laptop now (at work so i dont have the PC) and i see this change


using namespace std;

Now on the laptop im using Visual C++ 2008
so i dunno if that has anything to do with it.

now i put the code into the 2008 compiler and it works. (after a few corrections)

// crap.cpp : main project file.

#include <stdafx.h>
#include <iostream>


using namespace std;

int main()
{

int num, num2;

//ZOMG LOOP!
num = 1;
cout << "Enter a number, bitch!"; //happy Q that i added the comma?
cin >> num2;

while (num <= num2){
cout << "Fail " << num << endl;
num++;}


return 0;
}

this leads me to my next question

while (num <= num2){
cout << "Fail " << num << endl;
num++;}


without the braces, it goes into an infinite loop. but with the braces, it does what it is supposed to.

why?