C++ << std::end1;

Waffle · 28-05-2006, 03:46 PM

Starting to learn C++, seems like a fairly good learning curve.

Anyway, ran in to an error when using code from a book:

PHP Code:


			
#include <iostream>

int main()
{
  std::cout << "Hello world!\n"; // new line
  std::cout << "this is on a new line.." 
  return 0;
}

that works fine

then i read about using std::end1; -

PHP Code:


			
#include <iostream>

int main()
{
  std::cout << "Hello world!" << std::end1;
  std::cout << "this is on a new line.." << std::end1;
  std::cout << "and another";
  return 0;
}

this returns an error message:

E2316 'end1' is not a member of 'std' in function main() at line xx

Suggestions why?

Addis · 28-05-2006, 05:49 PM

Waffle, the endline function is spelt with an l at the end, not a 1.

So the statement would be:

Code:

cout << "testing testing" << endl;
cout << "New line this is";
cin.get(); //waits for user input

Also, you should try putting the statement

Code:

using namespace std;

above your int main() function, after the include headers so that you don't have to use the std:: bit before using the cout and cin objects.

Waffle · 28-05-2006, 06:18 PM

An L? I'll be damned. Looked just like a one I didn't give it a second thought.

I'll give that statement a shot as well - thanks

Karanislove · 29-05-2006, 01:36 AM

Quote:

Originally Posted by waffle

#include <iostream>

int main()
{
std::cout << "Hello world!" << std::end1;
std::cout << "this is on a new line.." << std::end1;
std::cout << "and another";
return 0;
}

In these types of functions, you can further reduce your lines... because you are not returning any value so instead of using...int main()...you can use void main() and your program will not look for a return value and you can remove that return 0 at the end.....
using "getch();" command will help in getting out of your program.....just use it in your function at the end.....

Addis · 29-05-2006, 11:57 AM

Karanislove, using

PHP Code:


			
void main()

is not recommended. ANSI C++ states that main must return an integer. With C++ being a very fast compiled language, theres no need to do that. Many compilers like gcc will give you a warning for not returning a value. In java, using void main is also illegal.

Karanislove · 29-05-2006, 09:31 PM

I never had any problem with this function using Visual Studio 2003.net

Addis · 29-05-2006, 11:35 PM

Thats because the VC++ compiler allows it, but if you want to build portable applications, its better to use standard ANSI C++ code.

vol7ron · 11-08-2006, 05:59 AM

I like void main() as well.

its endl instead of end1 because the L stands for line. Also you should include the library extension. For instance <iostream.h>

Why are you learning C++? It's dated. Move on to C#.

Addis · 24-08-2006, 12:32 AM

Quote:

Originally Posted by vol7ron

I like void main() as well.

its endl instead of end1 because the L stands for line. Also you should include the library extension. For instance <iostream.h>

There's absolutely no point in using void main(), if you want to be a good developer, stick to standards when possible, especially something as trivial as that. VC might allow it, but gcc in Linux won't. And to prove it, here's the output of using iostream.h, with void main and no return statement on gcc4.

Code:

In file included from /usr/lib/gcc/i586-mandriva-linux-gnu/4.0.1/../../../../include/c++/4.0.1/backward/iostream.h:31,
                 from voidmain.c:1:
/usr/lib/gcc/i586-mandriva-linux-gnu/4.0.1/../../../../include/c++/4.0.1/backward/backward_warning.h:32:2: warning: #warning This file includes at least one deprecated or antiquated header. Please consider using one of the 32 headers found in section 17.4.1.2 of the C++ standard. Examples include substituting the <X> header for the <X.h> header for C++ includes, or <iostream> instead of the deprecated header <iostream.h>. To disable this warning use -Wno-deprecated.
voidmain.c:5: error: '::main' must return 'int'

The reason you don't put .h after the iostream is because iostream is for C++, not C. All C++ STL's have just the format #include <name>. To include C headers, you leave off the .h and prefix the header with "c". E.g. #include <cstdio>

Quote:

Why are you learning C++? It's dated. Move on to C#.

C++ is definitely not dead, it may be older than C# but it still has many many uses. KDE is primarily written in C++.

Why use the Unix security system when its dated and Windows is newer?

harrack52 · 25-08-2006, 06:52 AM

You can also use \n inside your quotation marks (the "new line" character), it makes the code easier to read and faster to write.

\t for tabulations, as an FYI.

I understand c++ is much more powerful, but with Java you get the API for free, which is quite useful. After learning it a bit moving to c++ will be easier.

achi · 11-06-2008, 03:58 AM

ha ha!I am very stupid for this small mistake.
thanks for sharing.

28-05-2006, 03:46 PM	#1 (permalink) Top
Waffle Alpha Geek Join Date: Apr 2004 Age: 20 Male Posts: 2,270 Times Helpful: 51 My Mood: Angelic Status: Offline My Computer	C++ << std::end1; Starting to learn C++, seems like a fairly good learning curve. Anyway, ran in to an error when using code from a book: PHP Code: `#include <iostream> int main() { std::cout << "Hello world!\n"; // new line std::cout << "this is on a new line.." return 0; }` that works fine then i read about using std::end1; - PHP Code: `#include <iostream> int main() { std::cout << "Hello world!" << std::end1; std::cout << "this is on a new line.." << std::end1; std::cout << "and another"; return 0; }` this returns an error message: E2316 'end1' is not a member of 'std' in function main() at line xx Suggestions why?

28-05-2006, 05:49 PM	#2 (permalink) Top
Addis The King Join Date: Jan 2004 Age: 18 Male Posts: 5,254 Times Helpful: 402 My Mood: Drunk Status: Offline My Computer	Waffle, the endline function is spelt with an l at the end, not a 1. So the statement would be: Code: cout << "testing testing" << endl; cout << "New line this is"; cin.get(); //waits for user input Also, you should try putting the statement Code: using namespace std; above your int main() function, after the include headers so that you don't have to use the std:: bit before using the cout and cin objects. __________________ Never trust a program you don't have the source code for. My website \| Powerful Desktop Linux \| Linux for human beings \| Linux for power users \| Linux for ricers

29-05-2006, 11:57 AM	#5 (permalink) Top
Addis The King Join Date: Jan 2004 Age: 18 Male Posts: 5,254 Times Helpful: 402 My Mood: Drunk Status: Offline My Computer	Karanislove, using PHP Code: `void main()` is not recommended. ANSI C++ states that main must return an integer. With C++ being a very fast compiled language, theres no need to do that. Many compilers like gcc will give you a warning for not returning a value. In java, using void main is also illegal. __________________ Never trust a program you don't have the source code for. My website \| Powerful Desktop Linux \| Linux for human beings \| Linux for power users \| Linux for ricers

29-05-2006, 09:31 PM	#6 (permalink) Top
Karanislove It's D Grav80 Of Luv Join Date: Jan 2006 Age: 23 Male Posts: 3,460 Times Helpful: 160 My Mood: Cool Status: Offline My Computer	I never had any problem with this function using Visual Studio 2003.net __________________ __________________________________________________ ___ Troubleshoot a Dead/Unbootable PC / Microsoft Events Viewer Troubleshoot Printer / Most Common Home Audio Problems_

29-05-2006, 11:35 PM	#7 (permalink) Top
Addis The King Join Date: Jan 2004 Age: 18 Male Posts: 5,254 Times Helpful: 402 My Mood: Drunk Status: Offline My Computer	Thats because the VC++ compiler allows it, but if you want to build portable applications, its better to use standard ANSI C++ code. __________________ Never trust a program you don't have the source code for. My website \| Powerful Desktop Linux \| Linux for human beings \| Linux for power users \| Linux for ricers

28-05-2006, 06:18 PM	#3 (permalink) Top
Waffle Alpha Geek Join Date: Apr 2004 Age: 20 Male Posts: 2,270 Times Helpful: 51 My Mood: Angelic Status: Offline My Computer	An L? I'll be damned. Looked just like a one I didn't give it a second thought. I'll give that statement a shot as well - thanks

11-08-2006, 05:59 AM	#8 (permalink) Top
vol7ron Banned Join Date: Aug 2006 Posts: 153 Times Helpful: 20 My Mood: Amused Status: Offline	I like void main() as well. its endl instead of end1 because the L stands for line. Also you should include the library extension. For instance <iostream.h> Why are you learning C++? It's dated. Move on to C#.

25-08-2006, 06:52 AM	#10 (permalink) Top
harrack52 Supreme Geek Join Date: Jan 2003 Age: 27 Posts: 1,638 Times Helpful: 16 My Mood: Sick Status: Offline My Computer	You can also use \n inside your quotation marks (the "new line" character), it makes the code easier to read and faster to write. \t for tabulations, as an FYI. I understand c++ is much more powerful, but with Java you get the API for free, which is quite useful. After learning it a bit moving to c++ will be easier.

11-06-2008, 03:58 AM	#11 (permalink) Top
achi Geek Trainee Join Date: Jun 2008 Posts: 1 Status: Offline	ha ha!I am very stupid for this small mistake. thanks for sharing.

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