If you don’t want to use precompiled headers, then there is no point to using a standard include file – this will slow down the build for every file that includes it and cause them to include extra stuff that they do not need. Get rid of it and just include the headers they need.
Since we’ve covered the alignment issue, I would guess it’s this: http://en.wikipedia.org/wiki/Out-of-order_execution Since g++ issues a standalone load instruction, your processor can reorder the instructions to be pre-fetching the next data that will be needed while also adding and multiplying. MSVC throwing a pointer at mul makes the load and mul tied to the same … Read more
I tested the “reduced” version of the code using VS2012 C compiler int main() { int A[12] = { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 }; int sum = 0; int i; for (i = 0; i < 12; ++i) sum += A[11 – i]; printf(“%d\n”, sum); return 0; … Read more
MSVC is not a C99 compiler, and does not support variable length arrays. At https://learn.microsoft.com/en-us/cpp/c-language/ansi-conformance MSVC is documented as conforming to C90.
I don’t think any of those solution can help when your using different OS ! For ex, MsiQueryProductState will always returned -1 using Vista VC8.0 while -1 for VC8.0/8.0 SP1/9.0 with Windows 7 ! So the GUID solution that microsoft provided, doesn’t work in all cases so i guess i’m forced to stuck with the … Read more
In C++ the “^” symbol is the bitwise exclusive or (xor) operator. For a single bit you have 0 ^ 0 = 1 ^ 1 = 0 and 0 ^ 1 = 1 ^ 0 = 1. However, in the question you are refering to it is part of Microsoft special syntax for C++ development … Read more
There are basically two cases to call a .NET DLL from unmanaged code: The .NET DLL exposes a COM interface. In this case, you can use COM from your C++ code. The .NET DLL does not expose a COM interface. In this case, you have two possibilities (to make it simple): 2.a. host the CLR … Read more
Did you upgrade a project to Visual Studio 2010 from a previous version? If so, this is a well-known issue. Visual Studio 2010 C++ Project Upgrade Guide http://blogs.msdn.com/b/vcblog/archive/2010/03/02/visual-studio-2010-c-project-upgrade-guide.aspx Warnings during upgrade Here are some of the common warnings that you may run into during conversion: 1) Linker output directory One of the warnings you may … Read more
Simple answer: I use cdecl, stdcall, and fastcall. I seldom use fastcall. stdcall is used to call Windows API functions. Detailed answer (Stolen from Wikipedia): cdecl – In cdecl, subroutine arguments are passed on the stack. Integer values and memory addresses are returned in the EAX register, floating point values in the ST0 x87 register. … Read more
Look at the error message from gcc: a.cpp:16: error: call of overloaded ‘function(double, double)’ is ambiguous a.cpp:3: note: candidates are: void function(int, int) a.cpp:9: note: void function(float, float) A call to either function would require truncation, which is why neither is preferred over the other. I suspect you really want void function(double y,double w). Remember … Read more