I am trying to set up a project in visual studios for C but every time i do, i first get this error message
fatal error C1010: unexpected end of file while looking for precompiled header. Did you forget to add '#include "stdafx.h"' to your source?
then when i fix it by going into the "Properties->Precompiled header" i get this message
error LNK2005: _main already defined in clang.obj
. This has been going on for days now and i watched a bunch of videos and read a bunch of articles on this and I can't seem to find a fix. I just want to run my C program and have it execute without dealing with errors like those above. Here is what i do to set it up,
Create new project -> Select "Windows console application" -> change the "Location" to a file directory on my desktop -> then go to "Project" and "Add new item" -> i name that item "name.c" and when I am done, I insert my code and run it then i receive the same errors. Can someone please help me.
I think the problem is that when you choose Windows console application template, VS 2017 already generated a file which has a int main() function defined in it.
Then you added another file name.c which also has a main() function. Thus you got that error.
Related
I know a fair amount of Java and Eclipse IDE, but am new to Visual Studio and C++. In Eclipse/Java, if you use a predefined class, Eclipse helpfully suggests the appropriate header file to include for the code to compile. Wondering if Visual Studio has similar functionality.
For example every time I use a code sample from the web, I spend a lot of time Googling which header files to include so the code will compile. My current challenge: I'm writing a small utility that reads filenames in a directory into an array for batch renaming. For this, I'm using following code fragment:
DIR* dir;
struct dirent* dirEntry;
dirEntry = readdir(dir);
Visual Studio is giving the error message: "DIR" is unidentified. "readdir" is unidentified.Is there an efficient way to locate the appropriate header files for C++ code fragments to resolve error messages like these? Thanks.
I tested this feature in vs2019 community 16.3.6 and it works. When you hover the mouse at the location of an error, you can see an error light bulb. And click the drop-down arrow next to the error bulb to add missing #include.
You can also press Alt+Enter.
As mentioned in some answers above, Visual Studio has started offering some suggestions for header files. But as of this writing, some VS suggestions lead to other error messages. E.g. I just used getline(). VS gave error message: Identifier "getline" is unidentified. It suggested I add using namespace std::basic_istream; to my code. But this was not applicable to my code and produced additional error messages.
After stumbling around, I found a very simple solution: Visit the C++ reference website. There I searched for getline and found the header information at the following link: getline(). To fix the error, I needed to #include <string>.
I'm creating a project with openframeworks (the full source is here: https://github.com/morphogencc/ofxAsio/tree/master/example-udpreceiver), and the empty project seems to compile fine.
I added the ASIO library, and a few header classes, and now the project seems to be give me the following error:
1>------ Build started: Project: example-udpreceiver, Configuration: Debug x64 ------
1> main.cpp
1>cl : Command line error D8049: cannot execute 'C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\bin\x86_amd64\c1xx.dll': command line is too long to fit in debug record
1>cl : Command line error D8040: error creating or communicating with child process
I couldn't find any examples of error D8049 on stackoverflow or even on Microsoft's pages, and google turned up painfully few results. The only remotely useful one was this github issue:
https://github.com/deplinenoise/tundra/issues/270
But I'm still not sure what's causing the problem. Is anyone familiar with this error, and can recommend a method for troubleshooting what's causing it?
thanks in advance!
For me, working with UE4, this was an intermittent error.
I added "bLegacyPublicIncludePaths = false;" to the innermost block of project.Build.cs and recompiled without errors.
Then I removed that line and compiled again w/o errors.
The error message suggested adding "DefaultBuildSettings = BuildSettingsVersion.V2;" to project.Target.cs which worked.
This is a bit of a weird sounding error, as it is from essentially internally generated data. However, you do have control over that. Taking the error message at face value, you probably have many/lots of defined symbols passed in on the command line (or the the ones you do have have lengthy definitions), or you may have some lengthy file paths.
If you look under the project properties, one of the selections under the C++ section is "Command Line", which will show you exactly what gets passed to the compiler. When you view that you can see where you have many or lengthy parameters, and then make changes to shorten them.
Too many defines? Put them in a header (possibly stdafx.h) and include them that way.
Long file paths? Shorten the paths, put the files somewhere else, or set up file system aliases to your real directories that use shorter paths.
I am tryin to use openCV-2.4.11 library in visual studio 2013, to do so i followed
this tutorial and this slideshare tutorial
unfortunately, every time i run any C++ code even "Hello world", the compiler generates this error Link: fatal error LINK1104: cant open file 'opencv_core2411d.obj'
I also referred to some question in SO but they were not detailed or they discuss importing opencv library but in another IDE not visual studio.
note: the libs i used as input to the linker in the field 'Additional Dependencies':
opencv_calib3d2411d.lib
opencv_contrib2411d.lib
opencv_core2411d.lib
opencv_features2d2411d.lib
opencv_flann2411d.lib
opencv_gpu2411d.lib
opencv_haartraining_engined.lib
opencv_highgui2411d.lib
opencv_imgproc2411d.lib
opencv_legacy2411d.lib
opencv_ml2411d.lib
opencv_nonfree2411d.lib
opencv_objdetect2411d.lib
opencv_photo2411d.lib
opencv_stitching2411d.lib
opencv_ts2411d.lib
opencv_video2411d.lib
opencv_videostab2411d.lib
and i am using win8
please provide steps to successfully import opecv2.4.11 into visula studio and let me know why i am receivin this error
In my experience the linker error:
Link: fatal error LINK1104: cant open file 'opencv_core2411d.obj'
usually means that the linker cannot find the file. This is generally because the linker properties are not correct.
Check the property page under linker->"Additional Library Directories" and make sure that it is filled in and the path is correct.
Depending on how you have the project setup you may have different settings for debug and release configurations.
I was also having the same problem for quite a time and after searching everywhere in the internet i finally got the solution.
These input files are correct but you need to give the full path in Linker->Input->Additional Dependencies. i will show you how.
C:\opencv\build\x64\vc12\lib\opencv_calib3d2411d.lib
C:\opencv\build\x64\vc12\lib\opencv_contrib2411d.lib
C:\opencv\build\x64\vc12\lib\opencv_core2411d.lib
C:\opencv\build\x64\vc12\lib\opencv_features2d2411d.lib
C:\opencv\build\x64\vc12\lib\opencv_flann2411d.lib
C:\opencv\build\x64\vc12\lib\opencv_gpu2411d.lib
C:\opencv\build\x64\vc12\lib\opencv_highgui2411d.lib
C:\opencv\build\x64\vc12\lib\opencv_imgproc2411d.lib
C:\opencv\build\x64\vc12\lib\opencv_legacy2411d.lib
C:\opencv\build\x64\vc12\lib\opencv_ml2411d.lib
C:\opencv\build\x64\vc12\lib\opencv_objdetect2411d.lib
C:\opencv\build\x64\vc12\lib\opencv_ocl2411d.lib
C:\opencv\build\x64\vc12\lib\opencv_photo2411d.lib
C:\opencv\build\x64\vc12\lib\opencv_stitching2411d.lib
C:\opencv\build\x64\vc12\lib\opencv_superres2411d.lib
C:\opencv\build\x64\vc12\lib\opencv_ts2411d.lib
C:\opencv\build\x64\vc12\lib\opencv_video2411d.lib
C:\opencv\build\x64\vc12\lib\opencv_videostab2411d.lib
Also in Linker->General->Use Library Dependency Input, Click on yes
This should certainly help.
I am currently facing a problem which is as the error below
Error 1 error LNK2019: unresolved external symbol _main referenced in function ___tmainCRTStartup MSVCRTD.lib assignment
I am trying to redo the program, I have follow the step to do as same as article post by any user. I try to change the character set to not set, still no function available. I try to change from console to win turn out _winmain#16 error, and I change back _main error
I ald recreate the whole solution file i didnt recreate the coding or .CPP and .H file in my C++ programming,
How do I solve it, I already research for 3 - 4 days, but I still unable to get the answer that I have expect. Hopefully this may help me to complete the program. Thank you and your help much appreciated.
You've probably got some incompatible settings in your solution. In Visual Studio 2010, Create a new project, and select Win32 Console Application from the templates list. Click Next on the Wizard page, and select Console Application, and Empty Project, then Finish. Create a new .cpp file and put this code into it
int main ()
{
}
This should compile and link.
if it is an windows program：
1.menu-Project->Properties, to open this "Property Pages" window
2.then choose Configuration Properties->C/C++->Preprocessor,and delete "_CONSOLE" in Preprocessor Definitions , add "_WINDOWS".
3.return the first step:Configuration Properties->Linker->System,change it to Windows(/SUBSYSTEM:WINDOWS) in SubSystem
if it it a console program：
1.menu--> Project->Properties, pop out the "Property Pages" window
2.then choose Configuration Properties->C/C++->Preprocessor,and delete "_WINDOWS" int Preprocessor Definitions add "_CONSOLE".
3.return the first step：Configuration Properties->Linker->System,change it to CONSOLE(/SUBSYSTEM:CONSOLE) in SubSystem
Do you have a main function in your program? Because the windows runtime library (The MSVCRTD.lib you mentioned) will call your main function as the entry point. If you don't have one, there is a link error.
WinMan is the entry point for the win32 program.
I've been using CodeBlocks for a while now as I make a little hobby game in C++. Come across a snag whereby I want to see the current values of all the data in my arrays at any point, CodeBlocks doesn't seem to have that ability. Have been told by workmates (professional game programmers) that I should use Visual Studio.
Have previously used Visual Studio C# in the past, was very handy being able to use a break point while debugging other small games I've made and then going through the big list of watches to look at particular array values or any other value from within my program at that time.
So I've created a new blank project in VC2010 and added all my code files to the project. I know I have to link libraries and such, have spent the last few hours trying to figure out how to do that. But even after all that is done, I'm still getting link errors (I think)
First problem is this:
fatal error C1083: Cannot open include file: 'gl\glext.h': No such file or directory
So I commented it out to see how much further I could get.
Eventually had to add to my main.cpp file
#pragma comment (lib, "opengl32.lib")
#pragma comment (lib, "glu32.lib")
#pragma comment (lib, "libsoil.lib")
I ended up copying the libsoil.a file to C:\Program Files\Microsoft Visual Studio 10.0\VC\lib and renaming it to libsoil.lib (as stated on the authors's website http://www.lonesock.net/soil.html)
So now I get this when I compile
1>libsoil.lib(stb_image_aug.o) : error LNK2019: unresolved external symbol ___chkstk referenced in function _stbi_zlib_decode_noheader_buffer
1>libsoil.lib(image_helper.o) : error LNK2019: unresolved external symbol _sqrtf referenced in function _RGBE_to_RGBdivA2
1>C:\Repositories\HappyHelperPuppy\CppVer\HappyHelperPuppy\Debug\HappyHelperPuppy.exe : fatal error LNK1120: 2 unresolved externals
..And I have no idea what to do next. I've spent ages in Google and trawling through forums and I really just don't know what to do.
So as a last ditch effort I'm zipping up all my code and project files and letting anyone whos interested to have a look and see if they can find a solution. It's not like this game will have any secret feature I want to keep under wraps, and all the art is from an open game competition from ages ago ("TIGSource Assembly" for those who know what it is) or from DeviantArt (just wanted something to look at while I made it, wouldn't be final game release art)
The code/game can be found here http://users.on.net/~infernoraven/hhp_busted_code.zip (27mb)
The SOIL library should be in the main directory in its own soil.zip
Any help would be good, but I'm just getting really depressed as I seem to spend most of my time either fighting with the IDE/Compilers or some annoying syntax problem.
The CodeBlocks project files should be in there also, so if you..
un-comment out glext.h
link to SOIL
link to libopengl32 and libglu32
Hopefully it'll compile for you. Otherwise there should be an HappyHelperPuppy.exe that's precompiled by CodeBlocks that should hopefully run and give you an idea of what is suppose to happen
In the SOIL package there are a number of project files for visual studio. When I try to load up the VC9 one and convert it to VC10, I get conversion errors.
Conversion Report - SOIL.vcproj:
Converting project file 'C:\Documents and Settings\Administrator\My Documents\Downloads\soil\Simple OpenGL Image Library\projects\VC9\SOIL.vcproj'.
Failed to upgrade platform 'x64'. Please make sure you have it installed under '%vctargetspath%\platforms\x64'
VCWebServiceProxyGeneratorTool is no longer supported. The tool has been removed from your project settings.
Attribute 'Detect64BitPortabilityProblems' of 'VCCLCompilerTool' is not supported in this version and has been removed during conversion.
Attribute 'Detect64BitPortabilityProblems' of 'VCCLCompilerTool' is not supported in this version and has been removed during conversion.
Failed to upgrade 'Debug|x64'. Please make sure you have the corresponding platform installed under '%vctargetspath%\platforms\x64'
The project configuration dimension name/value "(Platform, Win32)" was not found in the project manifest.
Project upgrade failed.
If I use the VC8 project file and try to upgrade that, a libSOIL.lib file is generated by VC2010 throws an error saying "Unable to start program ... \SOIL.lib The specified file is an unrecognized or unsupported binary format"
But the author on his site states that I can simply rename the libSOIL.a file to a libSOIL.lib file and it should work.
The soil.zip file contains some .sln files under the folder projects. Use the proper .sln file to build the library, then link your project against this library. It worked fine on my side.