// 声明一个 int、一个 int*、一个函数,及一个函数指针 int a = 1, *p = NULL, f(), (*pf)(double); // 声明说明符序列 是 int // 声明符 f() 声明(但不定义)一个不接受实参并返回 int 的函数 struct S { virtual int f(char) const, g(int) &&; // 声明两个非静态成员函数 virtual...
{charc;inti;doubled;};};voidprint_s(constS&s){switch(s.tag){caseS::CHAR:std::cout<<s.c<<'\n';break;caseS::INT:std::cout<<s.i<<'\n';break;caseS::DOUBLE:std::cout<<s.d<<'\n';break;}}intmain(){S s={S::CHAR,'a'};print_s(s);s.tag=S::INT;s.i=123;print_s(...
longLONG_MAX unsignedlongULONG_MAX longlong(since C++11)LLONG_MAX unsignedlonglong(since C++11)ULLONG_MAX floatFLT_MAX doubleDBL_MAX longdoubleLDBL_MAX Example Demonstrates the use ofmax()with some fundamental types and some standard library typedefs (the output is system-specific): ...
void,bool,true,false,char,char8_t,char16_t,char32_t,wchar_t,int,short,long,signed,unsigned,float,double Defect reports The following behavior-changing defect reports were applied retroactively to previously published C++ standards. DRApplied toBehavior as publishedCorrect behavior ...
Original: List is a container which supports fast insertion and removal of elements from anywhere from the container. Fast random access is not supported. It is implemented as double-linked list. Compared tostd::forward_listthis container provides bidirectional iteration capability while being less sp...
See also inplace_vector (C++26) resizable, fixed capacity, inplace contiguous array (class template) array (C++11) fixed-sized inplace contiguous array (class template) deque double-ended queue (class template)
template<> struct hash<long double>; template< class T > struct hash<T*>; Spécialisations standard pour les types de bibliothèques std::hash<std::string>std::hash<std::u16string>std::hash<std::u32string>std::hash<std::wstring> (C++11) (C++11) (C++11) (C++11) soutien de hach...
template<> struct hash<double>; template<> struct hash<long double>; template< class T > struct hash<T*>; Standard Spezialisierungen für Bibliothekstypen std::hash<std::string>std::hash<std::u16string>std::hash<std::u32string>std::hash<std::wstring> (C++11)(C++11)(C++11)(C++11...
std::list est un conteneur qui permet l'insertion et la suppression rapide d'éléments depuis n'importe quel endroit du conteneur. L'accès rapide à une position aléatoire n'est pas supporté. std::list est implémenté comme une liste doublement chaînée. Par rapport à std::forward...
38f==std::numeric_limits<float>::max());static_assert(3.4028234e38f==// 结尾为 43.4028235e38f);// 结尾为 5static_assert(3.4028234e38!=// 结尾为 43.4028235e38);// 结尾为 5// 以下浮点数常量均为 3.4028234e38static_assert(3.4028234e38f!=// float(然后提升为 double)3.4028234e38);// double...