All Questions
Tagged with c++ visual-c++
16,839
questions
466
votes
31
answers
375k
views
Why is this program erroneously rejected by three C++ compilers?
I am having some difficulty compiling a C++ program that I've written.
This program is very simple and, to the best of my knowledge, conforms to all the rules set forth in the C++ Standard. I've ...
222
votes
31
answers
729k
views
Unresolved external symbol in object files [duplicate]
During coding in Visual Studio I got an unresolved external symbol error
and I've got no idea what to do. I don't know what's wrong.
Could you please decipher me? Where should I be looking for what ...
- 14.2k
195
votes
5
answers
158k
views
What does "#pragma comment" mean?
What does #pragma comment mean in the following?
#pragma comment(lib, "kernel32")
#pragma comment(lib, "user32")
- 62.8k
163
votes
13
answers
275k
views
error LNK2019: unresolved external symbol _WinMain@16 referenced in function ___tmainCRTStartup
While I am running the simple code as below I have two errors as following:
#include <iostream>
#include <string>
using namespace::std;
template <class Type>
class Stack
{
public:
...
- 1,659
163
votes
15
answers
178k
views
Fatal error: "No Target Architecture" in Visual Studio
When I try to compile my c++ project using Visual Studio 2010 in either Win32 or x64 mode I get the following error:
>C:\Program Files (x86)\Microsoft SDKs\Windows\v7.0A\include\winnt.h(135): ...
- 6,058
160
votes
9
answers
149k
views
Cannot open include file 'afxres.h' in VC2010 Express
I'm trying to compile an old project using VS express 2010 but I get this error:
fatal error RC1015: cannot open include file 'afxres.h'. from this code
////////////////////////////////////////////...
- 33.5k
158
votes
11
answers
210k
views
Disable single warning error
Is there a way to disable just a single warning line in a cpp file with visual studio?
For example, if I catch an exception and don't handle it, I get error 4101 (unreferenced local variable). Is ...
- 12.3k
152
votes
3
answers
180k
views
Explicit Return Type of Lambda
When I try and compile this code (VS2010) I am getting the following error:
error C3499: a lambda that has been specified to have a void return type cannot return a value
void DataFile::...
- 6,562
137
votes
6
answers
224k
views
LPCSTR, LPCTSTR and LPTSTR
What the difference between LPCSTR, LPCTSTR and LPTSTR?
Why do we need to do this to convert a string into a LV / _ITEM structure variable pszText:
LV_DISPINFO dispinfo;
dispinfo.item.pszText = ...
- 1,373
121
votes
11
answers
111k
views
Can I download the Visual C++ Command Line Compiler without Visual Studio?
As per the title. I don't want to download the entire Visual C++ installer, only "cl.exe" and the other programs required for compiling and linking C++ programs on Windows.
- 4,201
120
votes
24
answers
285k
views
Get a file name from a path
What is the simplest way to get the file name that from a path?
string filename = "C:\\MyDirectory\\MyFile.bat"
In this example, I should get "MyFile". without extension.
- 1,679
120
votes
3
answers
38k
views
What's the fundamental difference between MFC and ATL?
Assuming I am only using them for "normal" GUI programs (no COM, no ActiveX, nothing fancy), what is the fundamental difference I will see between ATL and MFC, to help me figure out which one to use?
...
- 208k
118
votes
6
answers
158k
views
How to call C++ function from C?
I know this.
Calling C function from C++:
If my application was in C++ and I had to call functions from a library written in C. Then I would have used
//main.cpp
extern "C" void ...
- 53.3k
116
votes
9
answers
480k
views
How to use _CRT_SECURE_NO_WARNINGS
I have a compile error in my simple MFC window application generated from wizard with several lines of code:
error C4996: 'strncpy': This function or variable may be unsafe. Consider using strncpy_s ...
- 17.7k
114
votes
7
answers
364k
views
'uint32_t' identifier not found error
I'm porting code from Linux C to Visual C++ for windows.
Visual C++ doesn't know #include <stdint.h> so I commented it out.
Later, I found a lot of those 'uint32_t': identifier not found ...
- 13.8k
114
votes
6
answers
87k
views
C++ #include and #import difference
What is the difference between #include and #import in C++?
- 58.4k
111
votes
5
answers
56k
views
How does the Import Library work? Details?
I know this may seem quite basic to geeks. But I want to make it crystal clear.
When I want to use a Win32 DLL, usually I just call the APIs like LoadLibrary() and GetProcAdderss(). But recently, I ...
- 63.2k
108
votes
3
answers
74k
views
what does __declspec(dllimport) really mean?
I saw the Qt source code like this:
class Q_CORE_EXPORT QBasicAtomicInt
{
public:
...
};
Which Q_CORE_EXPORT macro defines like below:
define Q_DECL_IMPORT __declspec(dllimport)
So what does ...
- 3,278
103
votes
12
answers
66k
views
Visual Studio support for new C / C++ standards?
I keep reading about C99 and C++11 and all these totally sweet things that are getting added to the language standard that might be nice to use someday. However, we currently languish in the land of ...
- 13.6k
102
votes
4
answers
462k
views
How to add additional libraries to Visual Studio project?
Allergro is an open souce C++ addon library for graphics manipulation. How do I add this library to my compiler?
The instructions don't work for me as I have Windows 7. I don't know if the OS matters....
- 11.2k
102
votes
8
answers
140k
views
memset() or value initialization to zero out a struct?
In Win32 API programming it's typical to use C structs with multiple fields. Usually only a couple of them have meaningful values and all others have to be zeroed out. This can be achieved in either ...
- 169k
101
votes
7
answers
161k
views
What is the difference between C++ and Visual C++? [duplicate]
What is the difference between C++ and Visual C++?
I know that C++ has the portability and all, so if you know C++ how is it related to Visual C++? Is Visual C++ mostly for online apps? Would Visual ...
adam
99
votes
5
answers
243k
views
How can I insert element into beginning of vector?
I need to insert values into the beginning of a std::vector and I need other values in this vector to be pushed to further positions for example: something added to beginning of a vector and values ...
- 1,011
95
votes
7
answers
145k
views
LNK2038: mismatch detected for 'RuntimeLibrary': value 'MT_StaticRelease' doesn't match value 'MD_DynamicRelease' in file.obj
I am Integrating Matlab, C and Cuda together in a project. I used Matlab mix in order to connect matlab mx function written in c with the cuda runtime library, a linking error appear about conflict in ...
- 991
95
votes
1
answer
62k
views
C++11 features in Visual Studio 2012
A preview version of Visual Studio 2012 (the next version after VS2010) is now available.
Does anyone know what new C++11 features it supports? (I'm not in a position to try it out at the moment).
- 51.6k
94
votes
5
answers
113k
views
module unsafe for SAFESEH image C++
I am using Microsoft Visual Studio 2011 Professional Beta
I am trying to run the OpenCV C++ files (http://opencv.willowgarage.com/wiki/Welcome) that I have compiled using cMake & the Visual ...
- 1,869
91
votes
8
answers
147k
views
How to increment an iterator by 2?
Can anybody tell me how to increment the iterator by 2?
iter++ is available - do I have to do iter+2? How can I achieve this?
- 13.8k
86
votes
7
answers
171k
views
How to write to the Output window in Visual Studio?
Which function should I use to output text to the "Output" window in Visual Studio?
I tried printf() but it doesn't show up.
- 33.5k
86
votes
5
answers
4k
views
How is "int* ptr = int()" value initialization not illegal?
The following code (taken from here):
int* ptr = int();
compiles in Visual C++ and value-initializes the pointer.
How is that possible? I mean int() yields an object of type int and I can't assign ...
- 169k
86
votes
9
answers
69k
views
Is it possible to force a function not to be inlined?
I want to force a little function not to be compiled as inline function even if it's very simple. I think this is useful for debug purpose. Is there any keyword to do this?
- 21.1k
85
votes
7
answers
72k
views
Is using #pragma warning push/pop the right way to temporarily alter warning level?
Once in a while it's difficult to write C++ code that wouldn't emit warnings at all. Having warnings enabled is however a good idea. So it is often necessary to disable warnings around some specific ...
- 169k
84
votes
11
answers
48k
views
Visual Studio 2010's strange "warning LNK4042"
I've just been beaten (rather hardly) on the head by some non-trivial warning from Visual Studio 2010 (C++).
The compilation gave the following output:
1 Debug\is.obj : warning LNK4042: object ...
- 294k
82
votes
2
answers
32k
views
What is the difference between the /Ox and /O2 compiler options?
Microsoft's C++ compiler (cl.exe, as included with Visual Studio) offers several optimization switches. The difference between most of them seems self-explanatory, but it's not clear to me what the ...
- 242k
79
votes
4
answers
239k
views
What is C# equivalent of <map> in C++? [duplicate]
I have defined a class myComplex. I need to map it to integers. In C++ I would have created a map as
map<myComplex,int> first;
How to do such thing in C#?
- 1,177
79
votes
2
answers
36k
views
Problem calling std::max
I compiled my bison-generated files in Visual Studio and got these errors:
...\position.hh(83): error C2589: '(' : illegal token on right side of '::'
...\position.hh(83): error C2059: syntax ...
- 1,527
78
votes
4
answers
132k
views
error LNK2005: xxx already defined in MSVCRT.lib(MSVCR100.dll) C:\something\LIBCMT.lib(setlocal.obj)
I'm using DCMTK library for reading Dicom files (Image format used in medical image processing.) I'm having a problem in compiling this DCMTK source code. DCMTK uses some additional external libraries ...
- 835
78
votes
11
answers
43k
views
Why is Visual C++ lacking refactor functionality?
When programming in C++ in Visual Studio 2008, why is there no functionality like that seen in the refactor menu when using C#?
I use Rename constantly and you really miss it when it's not there. I'm ...
- 27.6k
77
votes
8
answers
85k
views
GCC worth using on Windows to replace MSVC?
I currently develop in C++ on Windows, using Visual Studio 2010. After the official announcement of C++11, I have begun to use some of its features that are already available in MSVC. But, as expected,...
- 3,655
76
votes
10
answers
167k
views
Disabling Warnings generated via _CRT_SECURE_NO_DEPRECATE
What is the best way to disable the warnings generated via _CRT_SECURE_NO_DEPRECATE that allows them to be reinstated with ease and will work across Visual Studio versions?
- 7,289
76
votes
11
answers
6k
views
How bad is "if (!this)" in a C++ member function?
If I come across old code that does if (!this) return; in an app, how severe a risk is this? Is it a dangerous ticking time bomb that requires an immediate app-wide search and destroy effort, or is it ...
- 41k
76
votes
9
answers
27k
views
Useful Add-Ins or Plug-Ins for native Visual Studio developer [closed]
There are plenty of different Add-Ins for Visual Studio see Visual Studio Gallery
. Please share your experiences and favorites.
As motivation, here are some of my favorites:
Versioning Controlled ...
75
votes
7
answers
56k
views
Why aren't static const floats allowed? [duplicate]
I have a class which is essentially just holds a bunch of constant definitions used through my application. For some reason though, longs compile but floats do not:
class MY_CONSTS
{
public :
...
- 37k
73
votes
4
answers
149k
views
error LNK2038: mismatch detected for '_MSC_VER': value '1600' doesn't match value '1700' in CppFile1.obj
I was converting my projects from VS2010 to VS2012.But I am getting an _MSC_VER linker error in certain projects. After a long surfing through google I found out that the issue is due to linking of a ...
- 5,198
73
votes
3
answers
50k
views
placement new and delete
What is the right method to delete all the memory allocated here?
const char* charString = "Hello, World";
void *mem = ::operator new(sizeof(Buffer) + strlen(charString) + 1);
Buffer* buf = new(...
- 1,039
73
votes
6
answers
22k
views
What's up with the thousands of warnings in standard headers in MSVC -Wall?
Some people seem to advise you use -Wall, but when I did it on a small test project which just has a main.cpp with some includes, I get 5800 warnings most of them in standard headers or in windows ...
user1115652
71
votes
12
answers
72k
views
PCH Warning: header stop cannot be in a macro or #if block - Visual C++ 2010 Express SP1
This is pasted from a website, which presumably was working. I did some googling and found that the issue I have now is a result of Visual C++ 2010 SP1, which I downloaded today, and is now giving me ...
- 4,215
70
votes
4
answers
36k
views
Have a static lib, is there a simple way to know it is for 32 bit or 64 bit?
Is there any tool that can directly test if a library is made for 32 or 64 bit?
- 20.9k
69
votes
18
answers
58k
views
How to create a UTF-8 string literal in Visual C++ 2008
In VC++ 2003, I could just save the source file as UTF-8 and all strings were used as is. In other words, the following code would print the strings as is to the console. If the source file was saved ...
- 2,236
69
votes
8
answers
40k
views
Finding "dead code" in a large C++ legacy application [closed]
I'm currently working on a large and old C++ application that has had many developers before me. There is a lot of "dead code" in the project, classes and functions that aren't used by anyone anymore. ...
- 840
67
votes
7
answers
148k
views
Unexpected end of file error
I hope you can help me, cause I have no idea about what's going on. I'm having the following error while trying to add Beecrypt library to my project:
fatal error C1010: unexpected end of file ...
- 21.7k