I am having immense difficulty trying to use std::string. The program compiles absolutely fine, but when I run the program, I receive this error: error
I have looked everywhere on google and haven't found a thing on how to solve this issue. I have also tried writing my code differently to see if that would tell me anything.
std::string yourName;
std::cout << "What is your name?";
std::cin >> yourName;
std::cout << "Hello, " << yourName << std::endl;
Despite the rewrite, I am still getting the same exact error, and I am not forgetting to include the iostream and string header files.
I am using the GCC compiler and my compile code is g++ -std=c++14 test.cpp -o test.exe. I have also tried using the compile code g++ test.cpp -o test.exe. This did not fix the error.
I have asked this question before on Stack Overflow, but I failed to get a clear and understandable answer, most likely due to the fact that I am a complete beginner in programming. That being said, can someone please give me an answer on what might be causing this problem and how to fix it in plain English?
You can use
g++ <file> -static-libstdc++ -static-libgcc
I had the same problem, but it worked for me
I downloaded GCC from this link: Source Forge and reinstalled GCC. My problems were successfully fixed.
Related
I have a simple program, written in C++, on a Windows 10 machine, compiled with the MinGW g++ compiler.
I am including the <string> header, and it runs fine. When I include the string data type, it will compile, but it will not run.
The minimum amount of code to reproduce this is:
#include <iostream>
#include <string>
using namespace std;
int main() {
string greeting;
cout << "hi" << endl;
return 1;
}
Please note, this works fine:
#include <iostream>
#include <string>
using namespace std;
int main() {
//string greeting;
cout << "hi" << endl;
return 1;
}
The version of the compiler is 6.3.0
g++.exe (MinGW.org GCC-6.3.0-1) 6.3.0
I downloaded it 3 days ago, so I assume it is the most recent version. (Maybe not?)
I have googled and browsed stackoverflow for answers.
The closest question I could find, the person gave up and changed operating systems.
One other solution I found was to use Cygwin's compiler. I would rather not, as I already have a seemingly otherwise fine compiler. It seems that MinGW tools are widely used enough that I should be able to use the compiler.
Any other forum/blog/etc resources have problems about converting strings or calling string methods.
NOTE: The same exact code runs fine on Ubuntu 16.04, with the included compiler.
EDITS:
While I realize that "It does not run" is not helpful, I don't know how else to describe it. I run the compiled program, and it behaves the same as if I entered echo ''. There is no output, no indication that anything has happened. What is the most helpful way to phrase that behavior?
If I use a debugger, I get program exited with code 0xc0000139
A quick google search returns results indication that it is a problem with the compiler. Same as the comments below about my compiler version...
To compile the program, I run g++ main.cpp -o b.exe
To execute it, I run ./b.exe
Mingw has a long standing issue with certain consoles (see their faq). It might be worth checking whether it's failing to output rather than execute by e.g. redirecting to a file ./b.exe >out.txt.
After some useful comments, and much frustration, I decided to try to build the most current compiler. I caved and used Cygwin. (I really have no problem with Cygwin, I just wanted to get MinGW to work.)
I followed this site's instructions (after downloading the current source from https://gcc.gnu.org).
http://preshing.com/20141108/how-to-install-the-latest-gcc-on-windows/
Notes:
This is for an older version of gcc, but I replaced the appropriate version numbers with 8.2.0 (current at this time).
I was missing some prerequisites, and had to cd into the source directory and run ./contrib/download_prerequisites from the Cygwin terminal. It handled everything seamlessly, and while it took a little bit, I am now able to use string data types and run the program (successfully).
Don't forget the final make install command. I did, and it was a headache.
Lastly, thanks to all the helpful comments, and those that asked for clarification. When I call the mechanic, and say, "my car won't run", they ask helpful questions, and we work together to get them the relevant information they need. That's what happened above, and I learned some things (and solved my issue).
I had the same issue. I downloaded mingw a few days from sourceforge and everything complied fine except when I declared a string. Then it would show no output. Maybe it was some problem with the old version (6.3.0). I deleted all the files and re-installed using the given tutorial : https://code.visualstudio.com/docs/cpp/config-mingw . This is a newer version (8.1.0). Now it works just fine!
I am having immense difficulty trying to use std::string. The program compiles absolutely fine, but when I run the program, I receive this error: error
I have looked everywhere on google and haven't found a thing on how to solve this issue. I have also tried writing my code differently to see if that would tell me anything.
std::string yourName;
std::cout << "What is your name?";
std::cin >> yourName;
std::cout << "Hello, " << yourName << std::endl;
Despite the rewrite, I am still getting the same exact error, and I am not forgetting to include the iostream and string header files.
I am using the GCC compiler and my compile code is g++ -std=c++14 test.cpp -o test.exe. I have also tried using the compile code g++ test.cpp -o test.exe. This did not fix the error.
I have asked this question before on Stack Overflow, but I failed to get a clear and understandable answer, most likely due to the fact that I am a complete beginner in programming. That being said, can someone please give me an answer on what might be causing this problem and how to fix it in plain English?
You can use
g++ <file> -static-libstdc++ -static-libgcc
I had the same problem, but it worked for me
I downloaded GCC from this link: Source Forge and reinstalled GCC. My problems were successfully fixed.
I'm a complete newbie to C++. I'm trying to write a simple c++
program but I got an error message. I suspect this is due to me
accidentally deleting some .h files on my mac which might have ruined
my Clang compiler. How can I fix this? Do I need to reinstall Xcode or
change a compiler?
Error message from terminal:
192:desktop ivanlee$ gcc test.cpp
In file included from test.cpp:1:
In file included from /Library/Developer/CommandLineTools/usr/bin/../include/c++/v1/iostream:38:
In file included from /Library/Developer/CommandLineTools/usr/bin/../include/c++/v1/ios:215:
In file included from /Library/Developer/CommandLineTools/usr/bin/../include/c++/v1/iosfwd:90:
In file included from /usr/include/wchar.h:70:
In file included from /usr/include/_types.h:27:
/usr/include/sys/_types.h:32:10: fatal error: 'sys/cdefs.h' file not found
#include <sys/cdefs.h>
^
1 error generated.
Code:
#include <iostream>
int main(){
return 0;
std::cout << "Hey";
}
At first I ought to recommend you the definitive stackoverflow c++ books list. Read these books and get your skills grow. This also will prevent questions like this.
Your question needs very-very basic knowledges and answers may be too long and your problem can be solved by many different methods.
I can tell you one but you should not ask questions like this.
Answer
Your code contains a mistakes:
return 0 before your other instructions (it should be the last). Now your program will just do nothing.
You should always compile C++ code with C++ compiler. gcc is not a c++ compiler but c compiler - use g++ instead.
Even if you correct 2 errors above, your std::cout call may fail because it does not flush the stream. You should also add << std::endl to this call.
Execute
g++ test.cpp -o out
Instead of
gcc text.cpp
run Terminal
execute gcc -v
Read the info and copy the include path. Copy it to your IDE that allows you to add the include path.
Mine, for an example, is:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk/usr/include/c++/4.2.1
I recently started using CodeBlocks and began encountering odd runtime errors which I have traced back to printing strings using cout <<. For example, even the following..
#include <string>
#include <iostream>
int main()
{
std::string str;
str = "Hi!";
std::cout << str << std::endl;
return 0;
}
results in an error. It will compile fine (using Borland) but when I run it I get a pop up window saying 'test.exe has stopped working' and in the console I get the message:
Process returned -1073741819 (0xC0000005) execution time : 1.526 s
Press any key to continue.
It compiles and runs fine in MS Visual C++ and with G++ in Ubuntu.. any thoughts would be greatly appreciated!
Cheers,
Weatherwax
My one-off comment ended up helping solve the problem so here it is packaged up as an answer for future users:
This guy had a similar issue and it ended up being a linker issue which he
fixed. The fix is the last post in the thread, although reading the
whole thread could be useful for you.
Long Story short: Borland compiler is a bit dated and annoying to use. Ended up being a linker issue within borland. Better off using a different compiler like GCC/G++ or Visual Studio compiler.
This answer is here to elaborate on the root cause of the issue.
The reason for your crashing program is because the wrong runtime library is being linked. Specifically, your example is compiled as a single threaded object file(the default) but the linking step is using the multithreaded cw32mt.lib runtime -- the "mt" suffix at the end means multithreaded.
The solution is to make sure the runtime your program is compiled to use matches with the runtime you're linking against. A few ways to do this.
Important bcc32 compile switches:
-tW Windows GUI program. WinMain() is expected
-tWC Windows Console program. main() is expected. default.
-tWR Use dynamically linked runtime. Absence implies static runtime linkage.
-tWM Use multithreaded runtime. Absence implies single thread.
Compiling your example program as single threaded like this works:
bcc32 -oexample.obj -c example.cpp
ilink32 -ap example.obj c0x32, example.exe,, cw32.lib import32.lib,,
or you can compile it as multithreaded like this(note the -tWM switch matching up with cw32mt.lib):
bcc32 -tWM -oexample.obj -c example.cpp
ilink32 -ap example.obj c0x32, example.exe,, cw32mt.lib import32.lib,,
A third approach that is easier and less error prone is to not call the linker yourself. Instead, let the compiler drive the linker indirectly(similar to gcc):
bcc32 -tWM -oexample.obj -c example.cpp
bcc32 -tWM example.obj -eexample.exe
For your simple example, it can even be shortened to:
bcc32 -eexample.exe example.cpp
Lastly, you can pass the -tW switch multiple times. For example, this command compiles your example as a console program with multithread support and dynamic runtime linkage:
bcc32 -tWM -tWR -tWC -eexample.exe example.cpp
The produced example.exe executable is much smaller and its import table has an entry for CC3250MT.DLL confirming that the borland runtime is dynamically linked.
We should not assume that a non-functioning program is caused by nonconformity to the standard or a bug in the tool we're using without first investigating user error as a potential cause (even though in this case it's tempting to do so). In the OP's case, the code::block IDE didn't have the right commands setup for the toolchain being used.
I am trying to compile a c++ program in Linux, using the command in the shell
$ g++ -Wall *.cpp -o prog
and for some reason it keeps on giving me a weird error:
g++: Internal error: Bus error (program cc1plus) Please submit a full
bug report. See for
instructions.
I searched the net for this bus error, and it says that it has to do with something about accessing illegal memory.
Can someone maybe clarify things a bit more for me?
This error message is telling you that there's a bug in the g++ compiler itself.
Try to narrow it down by removing bits and pieces of your source file until the problem goes away. You're not trying to fix your program, you're just trying to find the part that is breaking the compiler. Once you've found it, you can either give a better bug description or you can change your code to work around it.
Or just download the latest version of the g++ compiler and hope that it's already fixed.
Your problem is not in your code, is the compiler (g++) that is crashing and producing that Bus Error, it's possible you have an outdated version of such compiler and need to update, or you're lucky and found a real bug in g++.
I would try compiling each source file separately, to check what part of the source code triggers the error.