code blocks 16.01 can't find headers.
I write some c++ code:
#include <iostream>
.....
int main()
{
...
}
it can be compiled without any errors or warnings, and run perfectly. But when I right-click the iostream then choose open iostream, it says that "Not found: iostream"
why? how to solve this problem?
I finally found that it's a matter of setting.
We should set the path of compiler as "...\codeblocks\MinGW\" rather than "...\codeblocks\MinGW\bin\". At meantime we should add an environment variable which is "...\codeblocks\MinGW\bin"
You're using int main function. In other words, it is waiting for a return of an integer. You can also solve this by just using void main function.
Related
So finally I’m not able to help myself out by researching anymore. Hopefully you can help me.
I recently decided to learn C++ in the context of my bachelor-thesis: My first aim is to read the pixel-values of a tiff-image with the libtiff-library. Yet, every call of a function of the library seems to break parts of my program.
Here’s the simple “HelloWorld”-Program, it works as it should:
#include "tiffio.h"
#include <iostream>
using namespace std;
int main() {
cout << "Hello" << endl;
// TIFF* tif = TIFFOpen("path to .tif", "r");
return 0;
}
When I uncomment the second line in main(), the code still does compile without errors (except the warning that ‘tif’ isn’t used) and I can start the program as usual. Yet nothing gets printed into the console anymore. Not “Hello” nor any errors.
Any suggestions where the error could be? The code should be alright, I guess I messed something up during the setup of the library or so. Here’s what I did:
I managed to set up eclipse (Mars, 32bit) for C++ and MinGW (32bit) on my 64bit Win7, then downloaded libtiff 4.0.4 and built it following this instruction.
I created a new C++-project with the mentioned code and did the following adjustments in the project-properties:
Project->Properties->C/C++ General->Paths and Symbols->Library
Paths-> Added “D:/… /tiff-4.0.4/libtiff/.libs”
Project->Properties->C/C++ Build->MinGW C++
Linker->Miscellaneous->Set Linkerflags to “-static-libgcc
-static-libstdc++”
Project->Properties->C/C++ Build->MinGW C++ Linker->Libraries-> Set
(-L) to “D:/… /tiff-4.0.4/libtiff/.libs” and (-l) to “libtiff”
I know the .tif is a valid file as I implemented parts of my program in C#, using the LibTiff.NET library by BitMiracle.
Thank you in advance!
Edit 1: The same error occures, even if TIFF* tif = TIFFOpen("path to .tif", "r"); is never called but written down in a dead part of the code. Debugging does not work either, the program seems to be terminated (exit value 0) before a single line is executed, without any error-reports.
I had the same issue and managed to get rid of it.
I set up eclipse (Mars) for C++ and MinGW on my 64bit Win7, then downloaded libtiff 4.0.4 and built it following this instruction.
After the build, I got two directories containing files:
include
tiff.h
tiffconf.h
tiffio.h
tiffio.hxx
tiffvers.h
lib
libtiff.a
libtiff.dll.a
libtiff.la
libtiffxx.a
libtiffxx.dll.a
libtiffxx.la
I also linked all include files and only the libtiff.a to my project and that solved it, ie, the other lines are now executed.
I hope, I helped with this post.
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.
main.cpp
#include <iostream>
#include <string>
using namespace std;
void echo(string);
int main()
{
echo("hello");
cout << "Hello world!" << endl;
return 0;
}
print.cpp
#include <iostream>
#include <string>
void echo(string code){
cout << code;
}
After compiling the code in code blocks 12.11, it gives me that error:
undefined reference to `echo(std::string)
I use windows 7 x64.
I have added the directory; Project>build options > search directories and added the current working directory.
All the files are in one console project in code blocks
I believe you should read up a bit more on namespaces usage. You are missing std in print.cpp.
Generally, while starting to learn cpp or getting a grip of the language you should always try writing full names of the classes along with the namespaces. Eventually with practice and some oversights (like now) you will learn why you really need them. In a nutshell namespaces are great:
When you are writing code over multiple files
Compartmentalize your code into separate blocks.
Also, using namespace std; should be used within cpp files mostly (otherwise headers get mangled up.
Anyways, try changing your code to this:
#include <iostream>
#include <string>
void echo(std::string code){
std::cout << code;
}
Then your results will look like this:
> g++ main.cpp print.cpp -o a.out
> ./a.out
helloHello world!
You should get more than that linker error, since you use string without any namespace in your print.cpp file. And if that source file doesn't compile it can't be linked with, and you will get the linker error you have.
Change to e.g.
void echo(std::string code) { ... }
And you do try to link with the object file created from print.cpp ?
I know this is old, but for anyone looking to solve this issue, the following may be a solution for you. If you have g++ follow c++ 11 under project->build options (check your options anyway) then you must check that box for all files you make in the project for the error to be cleared up. I had that annoying undefined reference thing too but now it is gone!
Try "Project/Properties/Build Targets tab". There you should find "Build target files" field. In that filed find "print.cpp" and click the checkbox (now the compiler will build print.cpp).
Some usefull information on Project management in CB
http://www.codeblocks.org/docs/main_codeblocks_en.html
When dealing with strings in C++ its best to sue std::string and your code seems to be wrong with a changes like using std::cout instead of plain cout another thing you need to be careful is linking your files especially files in different directories you need to tell code blocks were to find this print.cpp by going to build option and go for the search tab directory and point to where print.cpp is other wise the other approach is to just build a project which will have the main.cpp and and then add print.cpp class to current project I hope this will be of some help
I wrote a simple program in c++:
#include<iostream>
using namespace std;
int main()
{
cout<<sizeof(bool)<<endl;
return 0;
}
but when I compiled it with minGW and run it on windows7,a messagebox comeout saying Application stop working.but when I compiled it on linux with g++,it works well.How could this happen?
when I use printf on windows it works fine.Could anyone please explain why?
Are you sure you have the latest C++ libraries? in the old one it is just check this out.
and i think the new library is std::cout<<"" so i think you are using the old library. Try <iostream.h>
#include <iostream>
#include <stdlib.h>
using namespace std;
int main(int argc, char* argv[]) {
std:: cout<<"hello world";
std::cout<<"i am surprise<"<<std::endl;
return (EXIT_SUCCESS);
}
It is very strange because I am using netbeans in Ubuntu 10.04 and run this code. What happens here really makes me surprised; every line of code is marked with red line. For example:
first line indicates that it can't find indicator iostream or can't find file iostream;
second line can't find file stdlib;
third line unable to resolve identifier std and so on,
but it compiles fine and shows me the result "hello world i am surprise"
Please explain why is this happens?
Your IDE's "on the fly" correction tool might not be working correctly (because of bad settings or because fo bugs). I'm guessing it just don't have the access to the default includes.
Your compiler is a separate tool that have access to the includes so it will compile fine anyway.
Try to set the settings correctly or turn the underlining off, or even switch to a better IDE for C++.
The paths for "Code Assistance" are configured separately from your compiler includes. They are usually set when your tool chain is configured but you can check them from the Tools > Options dialog. If your includes are not in any of the paths listed, you will have to add the path. Below is an example of my configuration:
Tools->Options->Code Assistance->C++ Compiler->add path C:\MinGW\bin.
This solved the problem.