What's wrong with my "Hello World" source code?

[HitCode337]

// testing123.cpp : Testing purposes

#include "stdafx.h"


#include <iostream>
 
	int main()
	
	{
    std::cout << "Hello world!" << std::endl;

cin.clear();
cin.ignore(255, '\n');
cin.get();

	return 0;
}

I added

cin.clear();
cin.ignore(255, '\n');
cin.get();

Before the return function to pause the CMD from closing. When compiling, it returns one fail.

[Thumper]

What's the error it returns?

[quirkyusername]

your code isn't at fault it must be your compiler

[HitCode337]

I am using VC++ 2010

This is the error message:

1>Build started 9/19/2010 8:09:58 PM.
1>InitializeBuildStatus:
1>  Touching "Debug\testing123.unsuccessfulbuild".
1>ClCompile:
1>  All outputs are up-to-date.
1>  testing123.cpp
1>c:\users\quickcode\desktop\test projects\testing123\testing123\testing123.cpp(13): error C2065: 'cin' : undeclared identifier
1>c:\users\quickcode\desktop\test projects\testing123\testing123\testing123.cpp(13): error C2228: left of '.clear' must have class/struct/union
1>          type is ''unknown-type''
1>c:\users\quickcode\desktop\test projects\testing123\testing123\testing123.cpp(14): error C2065: 'cin' : undeclared identifier
1>c:\users\quickcode\desktop\test projects\testing123\testing123\testing123.cpp(14): error C2228: left of '.ignore' must have class/struct/union
1>          type is ''unknown-type''
1>c:\users\quickcode\desktop\test projects\testing123\testing123\testing123.cpp(15): error C2065: 'cin' : undeclared identifier
1>c:\users\quickcode\desktop\test projects\testing123\testing123\testing123.cpp(15): error C2228: left of '.get' must have class/struct/union
1>          type is ''unknown-type''
1>c:\users\quickcode\desktop\test projects\testing123\testing123\testing123.cpp(20): error C2513: 'int' : no variable declared before '='
1>c:\users\quickcode\desktop\test projects\testing123\testing123\testing123.cpp(21): error C2065: 'x' : undeclared identifier
1>c:\users\quickcode\desktop\test projects\testing123\testing123\testing123.cpp(21): fatal error C1004: unexpected end-of-file found
1>
1>Build FAILED.
1>
1>Time Elapsed 00:00:00.34
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

[Athar]

You must prefix cin with std:: or add using namespace std;

[HitCode337]

I included namespace underneath iostream and attempted to compile, this error came up.

1>c:\users\\desktop\test projects\testing123\testing123\testing123.cpp(21): error C2513: 'int' : no variable declared before '='
1>c:\users\\desktop\test projects\testing123\testing123\testing123.cpp(22): error C2065: 'x' : undeclared identifier
1>c:\users\\desktop\test projects\testing123\testing123\testing123.cpp(22): fatal error C1004: unexpected end-of-file found
1>
1>Build FAILED.
1>
1>Time Elapsed 00:00:00.28
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

[Thumper]

Hmm, i don't get why that's happening..

[Athar]

Post your whole code again.

[LB]

I see that you're using VC++ and that you mistakenly started a "New Console Project". This is not a good idea because it causes more issues than a "Blank Project".

Start a "Blank Project" (you may have to change which tree you are viewing on the left) and then right click the "Source Files" on the left and click "Add" -> "New Item" and add a .cpp file (you can name it anything).

Then you can start your program in there. Just this code will do:

#include <iostream>
using namespace std;

int main()
{
	cout << "Hello, World!" << endl;
	cin.get();

	return 0;
}

Screenshots: (yours may differ a little)
http://www.LB-Stuff.com/Temp/VC_NewBlankProj.png
http://www.LB-Stuff.com/Temp/VC_NewItem.png
http://www.LB-Stuff.com/Temp/VC_NewItem2.png
http://www.LB-Stuff.com/Temp/HelloWorld.png

[guestgulkan]

Coming back to the original problem.
The original post showed only 18 lines:

// testing123.cpp : Testing purposes

#include "stdafx.h"


#include <iostream>
 
	int main()
	
	{
    std::cout << "Hello world!" << std::endl;

cin.clear();
cin.ignore(255, '\n');
cin.get();

	return 0;
}

But the build was showing errors for lines 21 and 22

1>c:\users\\desktop\test projects\testing123\testing123\testing123.cpp(21): error C2513: 'int' : no variable declared before '='
1>c:\users\\desktop\test projects\testing123\testing123\testing123.cpp(22): error C2065: 'x' : undeclared identifier
1>c:\users\\desktop\test projects\testing123\testing123\testing123.cpp(22): fatal error C1004: unexpected end-of-file found
1>
1>Build FAILED.
1>
1>Time Elapsed 00:00:00.28
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

So to the original poster HitCode337 - What does your full source code look like?? There must be more than you posted.

[ThePillowist]

Does this work? Sorry, I'm a newbie too but I figured that if you are not using namespace std then you will have to put std:: for each of the cin too.


#include <iostream>

int main()

{
std::cout << "Hello world!" << std::endl;

std::cin.clear();
std::cin.ignore(255, '\n');
std::cin.get();

return 0;
}

[HitCode337]

@L B - Thank you, your method worked.