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'
This is related to the following line of code:
L.Precision=std::min(1.e-4,0.001*res);
L.Precision
is a double
, and res
is a double
. Previously this line was:
L.Precision=min(1.e-4,0.001*res);
But this gives the error:
error: 'min' was not declared in this scope
Here are the headers in the file in question:
#include<stdio.h>
#include<math.h>
//#include<algorithm.h>
#include <malloc.h>
#include "complex.h"
#include "mesh.h"
#include "spars.h"
#include "FemmeDocCore.h"
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.
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 p开发者_开发问答oint by MinGW. I want the final code to be cross-platform.
You should uncomment and fix #include <algorithm>
, (without the .h) which is where std::min
is declared.
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/.
Also: use <cmath>
and <cstdio>
, and avoid malloc
and friends, use new
/new[]
and delete
/delete[]
instead.
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