MinGW错误：'min'不是'std'的成员 [英] MinGW error: 'min' is not a member of 'std'

问题描述

我试图将一些VC ++ 6代码转换为控制台应用程序，只使用标准库，但从MinGW（无论版本是与Code :: Blocks 10.05 IDE）提供以下错误：

I'm trying to convert some VC++ 6 code to a console app using only the standard libraries but am getting the following error from MinGW (whatever version is supplied with the Code::Blocks 10.05 IDE):

error: 'min' is not a member of 'std'

这与以下代码行有关：

L.Precision=std::min(1.e-4,0.001*res);

L.Precision 是 double ， res 是 double 。以前这行是：

L.Precision is a double, and res is a double. Previously this line was:

L.Precision=min(1.e-4,0.001*res);

但这会产生错误：

error: 'min' was not declared in this scope

是所述文件中的标题：

#include<stdio.h>
#include<math.h>
//#include<algorithm.h>
#include <malloc.h>
#include "complex.h"
#include "mesh.h"
#include "spars.h"
#include "FemmeDocCore.h"

我理解这可能与文件中定义的一些宏相关 windef.h ，但纠正我，如果我错了这个。

I understand that this may be related to some macros defined in the file windef.h, but correct me if I'm wrong about this.

我该怎么办？我对C ++比较陌生，甚至不确定 windef.h 是否被调用，我认为这只是每个Windows程序所需要的，并添加在一些点击MinGW。

What exactly can I do about this? I'm relatively new to C++, and am not even sure where windef.h is called for instance, I presume this is just needed for every windows program and is added at some point by MinGW. I want the final code to be cross-platform.

推荐答案

您应该取消注释并修复 #include< ;算法> ，（没有.h），其中 std :: min 被声明。

You should uncomment and fix #include <algorithm>, (without the .h) which is where std::min is declared.

这绝对与MinGW或GCC或Windows无关，这是标准的C ++东西。如果您遇到任何其他错误，请在 http://en.cppreference.com/w/ 上搜索缺少的标识符。

This has absolutely nothing to do with MinGW or GCC or Windows, this is standard C++ stuff. If you hit any other errors like this, search for the missing identifier on http://en.cppreference.com/w/.

也可使用< cmath> 和< cstdio> ，并避免 malloc 和朋友，使用 new / new [] 和 delete / delete [] 。

Also: use <cmath> and <cstdio>, and avoid malloc and friends, use new/new[] and delete/delete[] instead.

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