文章被收录于专栏:CPP开发前沿 关联问题 换一批 STL中的迭代器是什么? 迭代器在STL中的作用是什么? 如何在STL中使用迭代器遍历容器? C++在操作容器时更加推荐使用迭代器进行操作,C++标准库为每一种标准容器都定义了一种迭代器类型同时也支持了对部分容器使用下标进行访问。 1 迭代器定义 C++标准委员会对迭代器的定义为:指向元素
:publicACE_Abstract_Timer_Queue<TYPE>,privateACE_Copy_Disabled {public://ConstructorexplicitACE_Timer_Queue_Upcall_Base(FUNCTOR * upcall_functor =0);///Destructorvirtual~ACE_Timer_Queue_Upcall_Base (void);///Accessor to the upcall functorFUNCTOR & upcall_functor (void);protected:///Upcall ...
ostream_iterator::char_type 類型,提供迭代器的字元類型。 C++ typedefCharType char_type; 備註 此類型是範本參數CharType的同義字。 範例 C++ // ostream_iterator_char_type.cpp// compile with: /EHsc#include<iterator>#include<vector>#include<iostream>intmain( ){usingnamespacestd;typedefostream_iterator...
typedef ACE_Timer_List_Iterator_T<TYPE, FUNCTOR, ACE_LOCK, TIME_POLICY> Iterator; /// Iterator is a friend friend class ACE_Timer_List_Iterator_T<TYPE, FUNCTOR, ACE_LOCK, TIME_POLICY>; typedef ACE_Timer_Node_T<TYPE> Node; /// Type inherited from typedef ACE_Timer_Queue_T<TYPE, FUNC...
ostream_iterator::char_type 为迭代器的字符类型提供的类型。 C++ typedefCharType char_type; 注解 该类型是模板参数CharType的同义词。 示例 C++ // ostream_iterator_char_type.cpp// compile with: /EHsc#include<iterator>#include<vector>#include<iostream>intmain( ){usingnamespacestd;typedefostream_itera...
// back_insert_iterator_container_type.cpp// compile with: /EHsc#include<iterator>#include<vector>#include<iostream>intmain( ){usingnamespacestd;inti;vector<int> vec;for(i =1; i <4; ++i ) { vec.push_back ( i ); }vector<int>::iterator vIter;cout<<"The original vector vec is: ...
mapStudent.insert(map<int, string>::value_type (1, “student_one”)); mapStudent.insert(map<int, string>::value_type (2, “student_two”)); mapStudent.insert(map<int, string>::value_type (3, “student_three”)); map<int, string>::iterator iter; ...
The type is a synonym for the template parameterChartype. Example C++ // istream_iterator_char_type.cpp// compile with: /EHsc#include<iterator>#include<vector>#include<iostream>intmain( ){usingnamespacestd;typedefistream_iterator<int>::char_type CHT1;typedefistream_iterator<int>::traits_type...
typename iterator_traits<_InputIterator>::difference_type __n =0;while(__first != __last) { ++__first; ++__n; }return__n; }// 迭代器相减template<typename _RandomAccessIterator>inlinetypename iterator_traits<_RandomAccessIterator>::difference_type ...
value_type T difference_type Distance pointer const T* reference const T& iterator_category std::input_iterator_tag 注意:在C++17之前,这些成员类型必须通过从std::iterator<std::input_iterator_tag,T,Distance,const T*,const T&>... 注记 当阅读字符时,std::istream_iterator默认情况下跳过空格%28,...