Hello World, in C++.

[Pragma]

i believe he meant to put int main()
its just a typo

[Apoc]

Using a "return;" in a void function is how you jump out of the current function without executing any code below that point. "return;" and "return something;" are completely different.

It's bad to add returns to void functions unless you want to explicitly exit out of the current function. (Say you hit an error, and don't want to execute any further code in the method)

[Glitchy]

If you think 4 line of code is bad for a hello world you should try ASM

Here is a "hello world" app for a ti-83 calculator. I use to make games in this language, and I'm having to pick ASM back up for some PIC programming I'm doing.

.NOLIST
#define   EQU   .equ
#define   equ   .equ
#define   END   .end
#define   end   .end
#include "ti83plus.inc"
.LIST

     .org 9D93h
     .db ,$6D
      ld a,0
      ld (CURCOL),a
      ld (CURROW),a
      ld hl,text
      B_CALL(_PutS)
      ret
text:
      .db "Hello, World",0

.end
end

[Apoc]

Hence why nobody codes entirely in ASM. :P

You'd commit suicide before you got anywhere with ASM.

[fattony]

++++++++++[>+++++++>++++++++++>+++<<<-]>++.>+.+++++++
..+++.>++.<<+++++++++++++++.>.+++.------.--------.>+.

See, only two lines! Brain**** ftw

[Glitchy]

Hence why nobody codes entirely in ASM. :P

You'd commit suicide before you got anywhere with ASM.

True a lot of PIC's not a days can wrap the asm code in C++

[Nebzor]

Just to add my purist taint, it should be as follows, and only as follows;

#include <iostream>

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

[Cypher]

Hence why nobody codes entirely in ASM. :P

You'd commit suicide before you got anywhere with ASM.

I use ASM. ^_^

Not to write entire programs in but inline in the DLLs I inject into WoW.

[Viter]

or you could write:

include <iostream>
using namespace std;

int main()
{
cout <<"Hello World"<<endl;
system("pause")
}

[Archdruid]

What compilers are you guys using?

[Sacred91]

I'm using Microsoft visual c++ 2008 oder Code::Blocks

[kruz2]

sorry,
Deleted.

[Recarver]

C:

#include <stdio.h>

#include <iostream> // Incializing for windows

int main(void)
{
printf("Hello World!");

// Incializing for windows
system("pause");

return 0;
}

C++:

#include <iostream>

using namespace std;

int main()
{

cout <<"Hello World!";

// Incializing for windows
cin.get();
cin.get();

return 0;
}

good luck

[unknown405]

Oh my god, this is obviously a thread for new coders trying to learn - PLEASE don't get them in the habit of using System("anything"). It's fine for HW assignments or meaningless little programs (like Hello World) but if you get them in the habit of using it, then they'll use it in their finished projects in the future. It's slow and it's a security risk, among other things it also tags you as a complete beginner. So to summarize, DONT USE SYSTEM("anything")!!

I've put together an upgrade to Hello World that contains a good alternative to using system("pause") as well as posting a version where every line is commented because I know this is generally for beginners and another code snippet with no comments so the more advanced users still using system("pause") can read it more legibly. One more thing I would like to add is that yes, there are a lot of alternatives to system("pause") but remember that a lot more methods than system("pause") have some kind of flaw in them.

//HelloUser

//Include necessary preprocessors
#include <iostream> //Used for input/output (cin/cout)
#include <string> //Used for string
#include <limits> //Used for the numeric_limits

//This prevents us from having to do "std::" before everything
using namespace std;

//Start of function
int main ()
{
//String declaration for our input
string str;

//Outputs on the screen, "What is your name?"
  cout << "What is your name? ";
//Here we take your answer to the question and convert it to our string declaration
	cin >> str;
//Outputs Hello%s, my name is Hello%s (with %s being input stream) then skips/ends line
  cout << "Hello " << str << ", my name is Hello" << str << endl;

//Alternative to system("pause") which should NEVER BE USED!!
	//This will ensure that the original ENTER was pushed after the final <<
  cin.ignore( numeric_limits<streamsize>::max(), 'n' );

//Outputs on screen you can quit by pressing ENTER
  cout << "Press ENTER to quit!";

//Alternative to system("pause") which should NEVER BE USED!!
  cin.ignore(numeric_limits<streamsize>::max(), 'n' );

//Outputs the text below
  cout << "Bye, make sure you program me even better next time!!";

//Return function telling our program that it exited with no errors
  return 0;
}

//HelloUser

#include <iostream> 
#include <string>
#include <limits>

using namespace std;

int main ()
{
string str;
  cout << "What is your name? ";
cin >> str;
  cout << "Hello " << str << ", my name is Hello" << str << endl;

cin.ignore( numeric_limits<streamsize>::max(), 'n' );
  cout << "Press ENTER to quit!";
cin.ignore(numeric_limits<streamsize>::max(), 'n' );
  cout << "Bye, make sure you program me even better next time!!";

  return 0;
}

PS: I also just noticed that you had said for C++ to use cin.get() twice. That's, again, a completely improper way of going about it and doesn't even make sense. Your making the user have to press enter TWICE while giving him absolutely no notification of what he's supposed to do. Please learn to do it the right way now before you get in a bad habit of that.

[breezy22]

Oh my god, this is obviously a thread for new coders trying to learn - PLEASE don't get them in the habit of using System("anything"). It's fine for HW assignments or meaningless little programs (like Hello World) but if you get them in the habit of using it, then they'll use it in their finished projects in the future. It's slow and it's a security risk, among other things it also tags you as a complete beginner. So to summarize, DONT USE SYSTEM("anything")!!

I've put together an upgrade to Hello World that contains a good alternative to using system("pause") as well as posting a version where every line is commented because I know this is generally for beginners and another code snippet with no comments so the more advanced users still using system("pause") can read it more legibly. One more thing I would like to add is that yes, there are a lot of alternatives to system("pause") but remember that a lot more methods than system("pause") have some kind of flaw in them.

//HelloUser

//Include necessary preprocessors
#include <iostream> //Used for input/output (cin/cout)
#include <string> //Used for string
#include <limits> //Used for the numeric_limits

//This prevents us from having to do "std::" before everything
using namespace std;

//Start of function
int main ()
{
//String declaration for our input
string str;

//Outputs on the screen, "What is your name?"
  cout << "What is your name? ";
//Here we take your answer to the question and convert it to our string declaration
	cin >> str;
//Outputs Hello%s, my name is Hello%s (with %s being input stream) then skips/ends line
  cout << "Hello " << str << ", my name is Hello" << str << endl;

//Alternative to system("pause") which should NEVER BE USED!!
	//This will ensure that the original ENTER was pushed after the final <<
  cin.ignore( numeric_limits<streamsize>::max(), 'n' );

//Outputs on screen you can quit by pressing ENTER
  cout << "Press ENTER to quit!";

//Alternative to system("pause") which should NEVER BE USED!!
  cin.ignore(numeric_limits<streamsize>::max(), 'n' );

//Outputs the text below
  cout << "Bye, make sure you program me even better next time!!";

//Return function telling our program that it exited with no errors
  return 0;
}

//HelloUser

#include <iostream> 
#include <string>
#include <limits>

using namespace std;

int main ()
{
string str;
  cout << "What is your name? ";
cin >> str;
  cout << "Hello " << str << ", my name is Hello" << str << endl;

cin.ignore( numeric_limits<streamsize>::max(), 'n' );
  cout << "Press ENTER to quit!";
cin.ignore(numeric_limits<streamsize>::max(), 'n' );
  cout << "Bye, make sure you program me even better next time!!";

  return 0;
}

PS: I also just noticed that you had said for C++ to use cin.get() twice. That's, again, a completely improper way of going about it and doesn't even make sense. Your making the user have to press enter TWICE while giving him absolutely no notification of what he's supposed to do. Please learn to do it the right way now before you get in a bad habit of that.

Yea I agree the cin.get() makes no sense. I would just return 0 and let it print the line. It's a hello world program the point is simple to print "Hello World".