Hello World, in C++.

[dragonowner]

Like all the others, here we go!

#include <iostream>

int main()
{
std::cout << "Hello worldn";
return 0;
}

The first line, "#include <iostream>" includes the library iostream, which is used later, for the command "std::cout". If we removed it, we would get that "std" isn't an class or namespace, and that "cout" has an undeclared identifier (std).

The next line, "int main()" creates the main function, this function is needed in EVERY C++ program.

Next line, "{" shows where the main() function start.

Next line, "std::cout << "Hello world!n";
"std" is the identifier for "cout", without "std::" infront of it, we would get a nasty error. We could actually have added "using namespace std;" after "#include <iostream>", and we wouldn't have to use "std::" anywhere in our program. "cout" is used to show something on the screen. "<<" Those two are needed before we show something on the screen, and the next i'm sure you can guess what does. The "n" part specifies a line-break. Instead of "n", we could've used "std::cout << "Hello world!" std::endl;" which makes it end the line (endl = end line).
The next line, "}" closes the main() function.
That was the legendary Hello World program in C++.

Ur code is messed up its supposed to be

#include <iostream.h>

int main()
{
       cout << "Hello World!/n";
              return 0;
}

[Jens]

#include <iostream>

int main()
{    
    std::cout << "\a" << std::endl;
}

why do i have to put \\ to make a single backslash in the code tags?..

[Mewhywhy]

jezus and i tought C++ whas easy hah guess im worng jezus christ so much code for a dos prompt saying Hello world .... amg

[dragonowner]

what the heck is the std::???

[arigity]

cout and endl are part of the std namespace, you need to tell the compiler this so you add std:: (or add using namespace std

[breezy22]

Ur code is messed up its supposed to be

#include <iostream.h>

int main()
{
       cout << "Hello World!n";
              return 0;
}

And yours is messed up also.

#include <iostream>
using namespace std;

int main()
{
       cout << "Hello World!" << endl;
       return 0;
}

This is how I would do it.

[dragonowner]

yea i messed up one character but yours is either a weird looking 1 after end its its and l and before using namespace std wouldnt you use //? becuase there is nothing really to direct the namespace to am i right?

[Jens]

yea i messed up one character but yours is either a weird looking 1 after end its its and l and before using namespace std wouldnt you use //? becuase there is nothing really to direct the namespace to am i right?

no you're not, proofread your comments they're a bit hard to decrypt.
also <iostream> & \n or std::endl;

[Dragon[Sky]]

Why are you using endl? I'd rather use \n than endl.
Besides, endl calls flush() function == more memory usage.

[breezy22]

Why are you using endl? I'd rather use n than endl.
Besides, endl calls flush() function == more memory usage.

Yea, because everyone knows you're worried about memory usage on your first C++ program!

[Dragon[Sky]]

It's not about the memory usage of a Hello world prog. It becomes a habit.
Personal experience.