29#ifndef _GLIBCXX_TR1_CSTDLIB
30#define _GLIBCXX_TR1_CSTDLIB 1
32#pragma GCC system_header
38#if _GLIBCXX_USE_C99_STDLIB
40namespace std _GLIBCXX_VISIBILITY(default)
42_GLIBCXX_BEGIN_NAMESPACE_VERSION
46#if !_GLIBCXX_USE_C99_LONG_LONG_DYNAMIC
64#if !_GLIBCXX_USE_C99_LONG_LONG_DYNAMIC
69_GLIBCXX_END_NAMESPACE_VERSION
_Tp abs(const complex< _Tp > &)
Return magnitude of z.
ISO C++ entities toplevel namespace is std.