Simple C++ question

For Beginners

Started by sneaky_squirrel July 31, 2008 09:03 PM

21 comments, last by sneaky_squirrel 15 years, 8 months ago

1,062

August 01, 2008 04:29 PM

Quote:Original post by MonkeyIsland
Some compilers also require you to put the full name of the header file. Instead of this: #include <iostream>
you put this: #include <iostream.h>

Do not do this. iostream.h is a C header that your compiler might have (many C++ compilers are also C compilers), not a standard C++ header. The standard C++ header is iostream (no .h!)

int main() is also perfectly legal, and compiles in every compiler I can think of. Neither of these are likely your problem.

@OP: It's really not possible to come to any kind of conclusion here without posting the error information and compiler you're using.

sneaky_squirrel

123

Author

August 01, 2008 10:40 PM

Wow amazing all the support here, anyways here is the useless error code:

c:\documents and settings\compaq_administrator\my documents\visual studio 2008\projects\my first project\my first project\first file.cpp(3) : warning C4627: '#include <iostream>': skipped when looking for precompiled header use        Add directive to 'stdafx.h' or rebuild precompiled headerc:\documents and settings\compaq_administrator\my documents\visual studio 2008\projects\my first project\my first project\first file.cpp(11) : fatal error C1010: unexpected end of file while looking for precompiled header. Did you forget to add '#include "stdafx.h"' to your source?Build log was saved at "file://c:\Documents and Settings\Compaq_Administrator\My Documents\Visual Studio 2008\Projects\My First Project\My First Project\Debug\BuildLog.htm"My First Project - 1 error(s), 1 warning(s)========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

I have no idea what it means, I tried adding this "#include "stdafx.h" and "stdafx.h", but nothing works, I am sure by reading this (Only thing it is telling me) you will know my situation, oh and I do use the Visual C++ 2008 express edition.

subflood

170

August 01, 2008 10:51 PM

Quote:
I have no idea what it means, I tried adding this "#include "stdafx.h" and "stdafx.h", but nothing works, I am sure by reading this (Only thing it is telling me) you will know my situation, oh and I do use the Visual C++ 2008 express edition.

When you make a new project in Visual Studio make sure you make an EMPTY win32 console application and uncheck the "precompiled header" check box.

File->New Project
Choose win32 console application
Hit Ok
Hit Next

Application Type:
Choose "Console Application"

Additional Options:
Choose "Empty Project"
UnCheck "Precompiled Header"

sneaky_squirrel

123

Author

August 02, 2008 09:35 PM

Didn't work, I did what you told me to and used this:

// my first program in C++

#include <iostream>
using namespace std;

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

And he is the error report, this programming really is difficult, tutorials give you instructions that don't work...:

------ Build started: Project: Hi, Configuration: Debug Win32 ------
Compiling...
Hi.cpp
Compiling manifest to resources...
Microsoft (R) Windows (R) Resource Compiler Version 6.0.5724.0
Copyright (C) Microsoft Corporation. All rights reserved.
Linking...
Embedding manifest...
Project : error PRJ0003 : Error spawning 'cmd.exe'.
Build log was saved at "file://c:\Documents and Settings\Compaq_Administrator\My Documents\Visual Studio 2008\Projects\Hi\Hi\Debug\BuildLog.htm"
Hi - 1 error(s), 0 warning(s)
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

Crypter

748

August 02, 2008 10:38 PM

Quote:Some compilers also require you to put the full name of the header file. Instead of this: #include <iostream>
you put this: #include <iostream.h>

iostream *is* the full file name. (At least in MSVC++)

Quote:

Project : error PRJ0003 : Error spawning 'cmd.exe'.

Perhaps this might help?

According to the link, it may not be finding cmd.exe, which may mean that your MSVC++ directories may be incorrect.

fastcall22

10,918

August 03, 2008 03:57 AM

Quote:Original post by Crypter
Quote:Some compilers also require you to put the full name of the header file. Instead of this: #include <iostream>
you put this: #include <iostream.h>
iostream *is* the full file name. (At least in MSVC++)

I believe the non-extension files are standard C++ while its .h counterpart is for standard C.

CodeLuggage

214

August 03, 2008 04:19 AM

I had an issue similar to this one the first time I installed and used VS2005, and wrote my "Hello World!"-program for the first time.

No one could figure out the random and faulty(!) errors I got, and in the end I just deleted everything and re-installed. From then on it worked perfectly. We assumed the installation was corrupted somehow, perhaps that has happened to you aswell?

Uninstall and delete everything, then re-download and re-install everything. Try again, and if it produces the same errors, at least you know it's not what happened to me.

Best of luck sorting this out - it's very frustrating to get stuck so early in the learning-process, as what you need now is everything working perfectly so you can focus on understanding the code and get into C++, not fighting random error-messages.

Student at NITH, Norway2nd year of Gameprogramming BachelordegreeC++ enthusiast

kiwibonga

183

August 03, 2008 09:45 AM

All you have to do is put all the #includes you need (#include <iostream>) in stdafx.h, and #include only stdafx.h in <project name>.cpp...

TheUnbeliever

963

August 03, 2008 10:23 AM

Quote:Original post by _fastcall
Quote:Original post by Crypter
Quote:Some compilers also require you to put the full name of the header file. Instead of this: #include <iostream>
you put this: #include <iostream.h>
iostream *is* the full file name. (At least in MSVC++)

I believe the non-extension files are standard C++ while its .h counterpart is for standard C.

iostream.h (and its like) is a non-standard (IIRC) backward compatibility header, provided to allow old code (C++ was standardized in 1998, but was in common use for some time beforehand) to continue to compile on newer, more standard-compliant, compilers. It's not a C header at all, and consequently you'll get reams of errors if you try to compile it as C.

[TheUnbeliever]

Wasif Hyder

122

August 03, 2008 10:27 AM

Thats quite simplea actually.

You are probably using visual c++ express

All you need to do is include stdafx.h header file before iostream

Here let me show:

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

int main() { /* Your code here */ }

Make sure stdafx.h comes first, aside from this check if you have this file. If you dont then it will be a problem.

Simple C++ question

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