为什么提示没有max函数没有被声明

[fortuneteller]

编译代码提示错误，提示max函数没有声明，但是已经#include <alogrithm>了。 不理解，请高人指点。


double max_setij_so_far() const {
double max_setij = setij();
std::vector<T*> my_ori = parents();
for (size_t i = 0; i < my_ori.size(); ++i)
max_setij = max(max_setij, my_ori[i]->max_setij_so_far());
return max_setij;
}


错误提示如下
error: ‘max’ was not declared in this scope, and no declarations were found by argument-dependent lookup at the point of instantiation [-fpermissive]
max_setij = max(max_dij, my_parents[i]->max_dij_so_far());

/usr/include/c++/4.8.3/bits/stl_algobase.h:260:5: note: ‘template<class _Tp, class _Compare> const _Tp& std::max(const _Tp&, const _Tp&, _Compare)’ declared here, later in the translation unit
max(const _Tp& __a, const _Tp& __b, _Compare __comp)
^

##################
默认的stl_algobase.h 模版我没有修改过 但似乎程序调用系统stl里的max不认识 正常应该可以直接去调用 max(const _Tp& __a, const _Tp& __b)阿，请指点
编译器是gcc 4.8.3

是不是my_ori[i]->max_setij_so_far() 需要重新定义一个量呢

[AlbertS]

using namespace std;

[zilaishuichina]

std::max<double>

[真相重于对错]

using namespace std; or std::max

[JiMoKuangXiangQu]

alogrithm 这个没写错吗？ algorithm

引用 1 楼 hdt 的回复:

using namespace std; or std::max

+1

[paschen]

max是在std名字空间下的 http://en.cppreference.com/w/cpp/algorithm/max

[赵4老师]

__max Returns the larger of two values. type __max( type a, type b ); Routine Required Header Compatibility _max <stdlib.h> Win 95, Win NT For additional compatibility information, see Compatibility in the Introduction. Libraries LIBC.LIB Single thread static library, retail version LIBCMT.LIB Multithread static library, retail version MSVCRT.LIB Import library for MSVCRT.DLL, retail version Return Value __max returns the larger of its arguments. Parameters type Any numeric data type a, b Values of any numeric type to be compared Remarks The __max macro compares two values and returns the value of the larger one. The arguments can be of any numeric data type, signed or unsigned. Both arguments and the return value must be of the same data type. Example /* MINMAX.C */ #include <stdlib.h> #include <stdio.h> void main( void ) { int a = 10; int b = 21; printf( "The larger of %d and %d is %d\n", a, b, __max( a, b ) ); printf( "The smaller of %d and %d is %d\n", a, b, __min( a, b ) ); } Output The larger of 10 and 21 is 21 The smaller of 10 and 21 is 10 Floating-Point Support Routines See Also __min

[吴瀚]

using namespace std;