I am doing an assignment for school and at school we use codeblocks for our IDE, but I wanted to use visual studio at home. The problem is when I run my program on visual studio I continue to get an operator error on my cin and cout but only before a string. I tried #include and while the error lines went away when I build I get the same error before. I am new to C++ and rather confused any help is appreciated.
picture of code below
The #include <string> you tried would be correct.
Your main problem is the #include "stdafx.h". It's a Precompiled header. Visual studio puts it in by default although it isn't required. It has to be the first include if you use it:
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.
Just put it as the first #include (or get rid of it completely) to fix your issue. Then the rest should start working normally.
Related
My code works well without #openmp
but I got this error when I added #openmp compiler
1>c:\users\hdd amd ali\documents\v studio 10 projects\visual studio 2010\projects\escaledesvols2 - copy\escaledesvols2\djikstra.cpp(116): fatal error C1001: An internal error occurred in the compiler.
1> (compiler file 'f:\dd\vctools\compiler\utc\src\p2\wvm\mdmiscw.c', ligne 1098)
note:
i use many different libraries (like #boost)
#include <string>
#include <iostream>
#include <stdio.h>
#include <ctime>
#include <iomanip>
#include <sstream>
#include <msclr\marshal_cppstd.h> // for unmanaged piece of code
#include <vcclr.h>
I had this issue recently; I was compiling with visual studio 2015. I tried it with visual studio 2017 and I still got the internal compiler error. Then I tried it with visual studio 2013 and it told me that I can't have a "return" statement inside an openMP section. when I removed the return from VS 2013 and VS 2105 the compiler was able to successfully compile. So, it make sense to try it with VS 2013 and it will give you a better error description. You could also be having return statements inside openMP sections and that could be the reason for c1001 error.
In my case it was a return function from the OpenMP loop. Removing a "return" line solved the problem.
You should simply report it.
In terms of workarounds, it is likely related to memory/resource consumption. Usual tricks to lower consumption are
disable debug information
split up compilation units to smaller size (this might be key here: "I'm using many libraries" should not be an issue unless you're including all the headers in a single translation unit
try to reduce template instantiations
Alternatively
reduce system load (close other programs, such as your Stackoverflow browser that might tatke valuable resources :))
I was using Visual C++ 6.0 just now, and I keep getting this error:
fatal error C1083: Cannot open include file: 'streambuf': No such file or directory
My code is just a simple hello world program.
#include "stdafx.h"
#include <iostream>
using namespace std;
int main(int argc, char* argv[])
{
cout<<"Hello World.";
return 1;
}
Then I went and checked my INCLUDE folder and found a file called STREAMBF, but the compiler was looking for STREAMBUF. Notice that the file that is present is missing the U, between the B and the F. This was from a good copy of VC++6.0, directly from the actual CD, not a pirated copy. So there should be all the files needed. But it appears that a file is missing! Is this MS being stupid again, and yet making another big mistake, and forgetting to include an important file on their CDs? I'd hate to think that every single CD for VC++6.0 that was pressed that came out of MS factories had this problem. And I know that it is a missing file, not just a misnamed file, as renaming STREAMBF to STREAMBUF just led to more errors.
Anybody know where I can find a copy of the file STREAMBUF? Or am I just overlooking something here? Is this exact error a known problem with running old copies of VC++ on modern OS's like Windows 7? Is it possible that the only reason that it's looking for STREAMBUF is that this is a newer file associated with Win7, and that if it was running in a different environment (an older OS), it would actually be looking for the correct file, STREAMBF? Can somebody help me here?
Your installation is either broken, deprecated or interpretes your code in wrong way.
You should only use older compiles if you are trying to build project developed entirely for this version.
Try to compile same code with new compiler, if you want to use VS then you should look for Visual Studio Express 2013.
Your code does not have any errors.
Modify your program to, you should be able to see it okay.
#include <iostream.h>
using namespace std;
int main()
{
cout<<"Hello World.";
return 1;
}
However,
your compiler is pretty old. You need to an upgrade.
There are C++ compilers for Windows from Microsoft Express Visual Studios Link and Info VS2013 to
some other non-Microsoft like GCC for Windows.
If you don't have installation access there are some portable c++ compilers.
Finally there are some online compilers for simple test. web based online compilers.
For my win 10 installation of VC 6.0, I had the same problem ... fatal error C1083: Cannot open include file: 'streambuf': No such file or directory
Replacing with <iostream.h> does not solve the problem.
I have checked the header file installation folder (Program files\VS98\VC98\INCLUDE). For some (unknown) reason, some file names have been changed during installation. Restoring the original name has solved the problem, in my case, in example:
Turn STREAMBF into STREAMBUF, STDXCEPT into STDEXCEPT, XCEPTION into EXCEPTION, FCTIONAL into FUNCTIONAL.
Notice: other header file names might be wrong. I have listed above the file names wrong in my installation.
I hope this may help.
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.
I didn't find anything like this when I searched for it. I'm trying to make a simple gstreamer app based on code I found in another stack overflow thread. Whenever I try to compile it by going to the directory with command prompt and entering cl cppgstreamer.cc. Initially, the only include was #include <gstreamermm.h>, which gives me
cppgstreamer.cc(1) : fatal error C1083: Cannot open include file: 'gstreamermm.h
': No such file or directory
Even when I put cppgstreamer.cc into the same directory as gstreamermm.h. I then tried changing the include to
#include "C:\Users\MY_NAME\Documents\gstreamer c++\gstreamermm-0.10.10.2\gstreamer\gstreamermm.h"
with MY_NAME being replaced by my name.
This seems to work, but then it tries to do the includes in the gstreamermm.h, and they are in #include <file.h> form, so I get another fatal error C1083,except this time with init.h, or when I changed that, error.h. And they have dependencies. Is there a way that I can get my compiler to like the #include <file.h> syntax? I really don't want to go through the file and change every #include <file.h> to #include "file.h".
Sorry if this is a dumb question. I'm new to C++, although I've worked with C in the past.
I am using Microsoft Visual C++ Express 2010. Any help would be appreciated. Thanks!
You need to add the directory containing gstreamermm.h to include path. I don't have visual c++ here to check, but it's in somewhere in project properties under C/C++ .