This problem doesn’t come up very often. The solution I’m familiar with was designed by Doug McIlroy and appears in Bjarne Stroustrup’s books (presented in both Design & Evolution of C++ section 12.8 and The C++ Programming Language section 25.6). According to the discussion in Design & Evolution, there was a proposal to handle this … Read more
Two issues I’d comment on. First, you don’t mention what platform you’re targeting. Although recent Windows versions (Win2000, WinXP, Vista and Win7) support both Multibyte and Unicode versions of system calls using strings, the Unicode versions are faster (the multibyte versions are wrappers that convert to Unicode, call the Unicode version, then convert any returned … Read more
It’s parsed as c = a++ + b, and a++ means post-increment, i.e. increment after taking the value of a to compute a + b == 2 + 5. Please, never write code like this.
__GNUC__ doesn’t mean GCC specifically. All compilers that support GNU C extensions define it, including clang and ICC. The normal way to detect specifically GCC is by excluding other “compatible” compilers #if defined(__GNUC__) && !defined(__llvm__) && !defined(__INTEL_COMPILER) #define REAL_GCC __GNUC__ // probably #endif The Clang front-end defines __clang__, but other front-ends that use the LLVM … Read more
Visual C++ does not support inline assembly for x64 (or ARM) processors, because generally using inline assembly is a bad idea. Usually compilers produce better assembly than humans. Even if you can produce better assembly than the compiler, using inline assembly generally defeats code optimizers of any type. Sure, your bit of hand optimized code … Read more
LIB is for the linker, helps it find import and static libraries. LIBPATH is for the compiler, helps it find metadata files. Like type libraries, .NET assemblies, WinRT .winmd files.
strcpy is a unsafe function. When you try to copy a string using strcpy() to a buffer which is not large enough to contain it, it will cause a buffer overflow. strcpy_s() is a security enhanced version of strcpy(). With strcpy_s you can specify the size of the destination buffer to avoid buffer overflows during … Read more
The only legal characters according to the standard are alphanumerics and the underscore. The standard does require that just about anything Unicode considers alphabetic is acceptable (but only as single code-point characters). In practice, implementations offer extensions (i.e. some do accept a $) and restrictions (most don’t accept all of the required Unicode characters). If … Read more
These files are produced when Incremental Link-Time Code Generation (LTCG) is enabled. This is a new feature in Visual C++ 2015. If you disable Incremental LTCG, the linker will stop producing these files. But then you lose the benefits of Incremental LTCG. To disable Incremental LTCG, modify your project properties: Under Linker => Optimization change … Read more
try this，it is said coming from M$ HWND hCurWnd = ::GetForegroundWindow(); DWORD dwMyID = ::GetCurrentThreadId(); DWORD dwCurID = ::GetWindowThreadProcessId(hCurWnd, NULL); ::AttachThreadInput(dwCurID, dwMyID, TRUE); ::SetWindowPos(m_hWnd, HWND_TOPMOST, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE); ::SetWindowPos(m_hWnd, HWND_NOTOPMOST, 0, 0, 0, 0, SWP_SHOWWINDOW | SWP_NOSIZE | SWP_NOMOVE); ::SetForegroundWindow(m_hWnd); ::SetFocus(m_hWnd); ::SetActiveWindow(m_hWnd); ::AttachThreadInput(dwCurID, dwMyID, FALSE); In order to bring a window … Read more