This question already has answers here:
vcl.h: No such file or directory
(2 answers)
Closed 8 years ago.
When trying to run this code on Xcode, #include vcl.h gets an error that says vcl.h file not found. Can someone help me fix it? The error occurs in the first line of the program code.
#include <vcl.h>
#pragma hdrstop
#include <stdio.h>
#include <stdlib.h>
#include <stdexcept>
//---------------------------------------------------------------------------
vcl.h is provided by Borland C++ Builder. It is not a standard library, so you need to provide it somehow.
It appears that the old C++ builder is now the Embarcadero C++ Builder, so you may need to install that library first
Instead of the angled brackets, have you tried a quoted import?
#include "vcl.h"
Do you actually have the header and associated file in your project? because I don't think vcl.h is a system library. All I can find about it is that it is a Borland specific file, which does not come with Xcode.
Related
Netbeans fails compilation on:
#include <string>
Output says:
main.c:10:18: fatal error: string: No such file or directory
#include <string>
The previous two declarations are included fine:
#include <stdio.h>
#include <stdlib.h>
I have removed all the code afterwards to make sure.
I am using cygwin_64 and it installed as per Netbeans c++ installation manual and shows versions in CLI
I am new to C++ and I know there have been similar questions, but the answers didn't help me.
Just try to create new project and follow these steps:
Click File->Create project.
Choose C/C++, then C/C++ application, click Next.
Enter project name and in the right choose C++ in combobox. Or C++11.
This question already has answers here:
fatal error: iostream.h no such file or directory [duplicate]
(3 answers)
Closed 6 years ago.
I am using Windows 8.1 and Dev C++ and I have the following code:
#include<iostream.h>
main()
{
cout<<"welcome to devc++";
system("pause");
}
The syntax is correct, but I get an error that says:
[Error] iostream.h: No such file or directory
I have tried to change to location of this .cpp folder, watched video tutorials, but I could not point out why I am getting this error and how to remove it.
You need to use #include<iostream> instead of #include<iostream.h>. The later one has been deprecated now; which is why you face the error. More details here.
Besides, main() being a function, should have a return type. So, you should write int main() and not just main().
Just do,
#include <iostream>
instead of
#include <iostream.h>
because, as C++ progressed from specific implementation to standard one,.h were deprecated from he library.
In addition to changing to
#include <iostream>
You can also add
using namespace std;
before main if you want to use cout without having to use std::cout.
This question already has answers here:
Is there a replacement for unistd.h for Windows (Visual C)?
(10 answers)
Closed 9 years ago.
I'm new to C++. I want to use the header file Random.h (described here http://ftp.arl.mil/random/). It uses unistd.h
Which gives me an error
"Cannot open include file: 'unistd.h': No such file or directory"
I've googled around and seen that the issue is that unistd.h works with unix not visual express. Some posts suggest using mingw instead but I've tried that and it doesn't work. Can anyone tell me how to get unistd.h (or at least the bits of it I need) to work on Visual Express.
There are some suggestions online but I cant find anything that addresses my particular question.
thanks!
It is including unistd.h for calls to getpid(). Change the #include to <process.h> and change all the getpid() calls to _getpid() (note the extra underscore at the front).
msdn.microsoft.com/en-us/library/t2y34y40.aspx
Visual C++ will not let you assign static const doubles in the header file (ony integer types). You will need to change the line in the .h file to this...
static const double _F;
Then create a Random.cpp file that just contains this...
#include "Random.h"
// Initialize static variable
const double Random::_F = 1. / Random::_M;
So, I have this question. Why does cout throws
error C2065: 'cout' : undeclared identifier
I am using Visual Studio 2012 as an IDE and I am writing a school project. I have everything done except an example file. So I am trying to write something on the screen like this:
#include "iostream"
#include "stdafx.h"
using namespace std;
int main()
{
cout<<"example";
return 0;
}
So the problem is with cout... printf works fine, but I want to use cout.
EDIT:
I've changed "" to <> but it is not helping. Also I am using this code only for example... This is not the whole project.
stdafx.h shall be the first include directive in your source file.
Switch files and convert the second include to <>, as other suggested.
#include "stdafx.h"
#include <iostream>
See this post for more information.
First of all:
#include <iostream>
instead of #include "iostream"
Secondly, it is generally considered bad practice to write using namespace std;, even though most courses start with that. It is better to only use what you actually need, in your case:
using std::cout;
#include "iostream"
should be
#include <iostream>
Quoting from this post:difference-between-iostream-and-iostream-quotes-in-include
By courtesy of #Jerry Coffin's answer:
When you use < >, the compiler only looks in the system-designated directory/directories (e.g., whatever you've set in the include environment variable) for the header.
When you use " ", the compiler looks in the local directory first, and if that fails, re-searches just like you'd used < >. Technically, (i.e., according to the standard) that doesn't have to be the "local" directory, but that's how it works in essentially every compiler of which I'm aware).
EDIT:
However, the root cause is that stdafx.h is a precompiled header. Visual C++ will not compile anything before the #include "stdafx.h" in the source file, unless the compile option /Yu'stdafx.h' is unchecked (by default); it assumes all code in the source up to and including that line is already compiled. However, it is still better to use <> with iostream not to confuse reader of the code.
If you use #include <iostream> with the <> instead of "" then it should work. Right now, the compiler doesn't know where to find the iostream library.
Also, you might want to change cout<<"example"; to cout<<"example"<<endl; for a new line so that it formats correctly.
Came across this issue while trying to build a Dynamic Linked Library. Make sure that instead of the #include stdafx.h you specify the following include on the first line of your .cpp file:
#include "pch.h"
This should also be the case for VS2017 or earlier.
This error also occurred in the Visual Studio 2017 IDE. Moving stdafx.h to the top solved the error.
For more on stdafx.h, see What's the use for "stdafx.h" in Visual Studio?
I am trying to build a C++ app that uses both websocketpp and MySQL. I have encountered 2 build problems using VS 2010 C++ Express.
1) A problem with the boost libraries. It produces many errors like this:
1>c:\program files (x86)\boost\boost_1_50\boost\thread\win32\thread_data.hpp(210): error C2146: syntax error : missing ')' before identifier 'rel_time'
Here's the relevant snippet from thread_data.hpp starting with line 210:
inline BOOST_SYMBOL_VISIBLE void sleep(TimeDuration const& rel_time)
{
interruptible_wait(detail::pin_to_zero(rel_time.total_milliseconds()));
}
2) A conflict with the word VERSION which is documented here and I believe is independent.
To make a clear and simple example of the boost build problems, I'm using the websocketpp example: echo_server.cpp to which I added these includes:
#include "stdafx.h"
Boost lib includes recommended by "Building a program with websocketpp" on the websocketpp site.
#include <boost/regex.hpp>
#include <boost/random.hpp>
#include <boost/system/api_config.hpp>
#include <boost/system/config.hpp>
#include <boost/system/error_code.hpp>
#include <boost/system/system_error.hpp>
#include <boost/system/windows_error.hpp>
and the MySQL header includes. Adding these 2 boostincludes triggers the build errors. If I comment out these 2 includes, it builds without errors:
#include <my_global.h>
#include <mysql.h>
Any suggestions on how to deal with the boost problems?
I don't think this is the same build problem as this one, "Trying to build websocket++ with MinGW: last few linker errors — what could it be?"
Concerning the first error, check if there are any macros interfering with the code. Right-click and go to definition or #define the macro yourself at the beginning of the file and see where it gets redefined. In really hard cases, look at the preprocessor output via a compiler flag.
Concerning the rest, you don't provide any versions for Boost and MySQL. Then, there is my_global.h (or is that part of MySQL?) and stdafx.h, which are both under your control but you don't show them here. Also, try to reduce the issue to the smallest possible piece of code. In short, provide a reproducible example.