c++ - 错误 C2084 : function 'float cbrt(float) throw()' already has a body

Question

我在visual studio 2010平台下成功编译了这个项目，但是在vs 2013中出现了这些错误:

 C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\INCLUDE\math.h(1045) : see previous definition of 'cbrt'
d:\documents\qtprojecttest\rtsc\project4\trimesh2\include\Vec.h(657) : error C2084: function 'long double cbrt(long double) throw()' already has a body
 C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\INCLUDE\math.h(1161) : see previous definition of 'cbrt'
d:\documents\qtprojecttest\rtsc\project4\trimesh2\include\Vec.h(664) : error C2084: function 'float round(float) throw()' already has a body
C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\INCLUDE\math.h(1125) : see previous definition of 'round'
d:\documents\qtprojecttest\rtsc\project4\trimesh2\include\Vec.h(672) : error C2084: function 'long double round(long double) throw()' already has a body
 C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\INCLUDE\math.h(1241) : see previous definition of 'round'
d:\documents\qtprojecttest\rtsc\project4\trimesh2\include\Vec.h(679) : error C2084: function 'float trunc(float) throw()' already has a body
C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\INCLUDE\math.h(1143) : see previous definition of 'trunc'
d:\documents\qtprojecttest\rtsc\project4\trimesh2\include\Vec.h(687) : error C2084: function 'long double trunc(long double) throw()' already has a body

我想知道为什么会有这样的差异，如何解决？

Answer 1

为什么 VS2010 和 VS2013 有这么大的区别？因为VS2010没有cbrt的定义，而VS2013有。所以可以使用_MSC_VER，或者直接在Vec.h中注释repeat function body。