Visual Studio 2010 中是否有 64 位的#define？

Question

Is there a #define that indicates whether Visual Studio is compiling in 64bit mode? I'd like to be able to include some code conditionally like so

#ifdef _IS_64BIT
  ...
#else //32 bit
  ...
#endif

I know I can create a flag myself, but I'm wondering if the compiler provides one.

Answer 1

#ifdef _WIN64
  ...
#else
  ...
#endif

Documented on Microsoft docs

Answer 2

Use _WIN64 . It won't matter the type of 64 bit processor.

Answer 3

#ifdef WIN32或#ifdef _WIN32将在 x64 中工作。