classvector:protected_Vector_base<_Tp,_Alloc>explicitvector(size_type __n):_Base(__n,allocator_type()){_M_finish=uninitialized_fill_n(_M_start,__n,_Tp());}template<class_Tp,class_Alloc>class_Vector_base{public:~_Vector_base(){_M_deallocate(_M_start,_M_end_of_storage-_M_start);...
vector是表示可以改变大小的数组的序列容器。 就像数组一样,vector使用连续存储空间存储元素,这意味着它们的元素也可以使用指向其元素的指针进行偏移来访问,并与数组一样高效。但与数组不同的是, vector的大小可以动态变化,并且是由容器自动处理的。 在内部实现上,vector使用动态分配的数组来存储它们的元素。在插入新元素...
从std::vector开始追踪,可以先看到__normal_iterator中只有一个_Iterator也就是pointer类型的数据成员_M_current,然后回溯pointer可以知道它其实是_Tp*,所以std::vector<T>::iterator实际就是T*。回溯的过程涉及到分配器的特化,最后会追溯到std::allocator类。 整个rebind的过程比较复杂,上面的代码列出了C++11的核心...
1)std::vectoris a sequence container that encapsulates dynamic size arrays. 2)std::pmr::vectoris an alias template that uses apolymorphic allocator. The elements are stored contiguously, which means that elements can be accessed not only through iterators, but also using offsets to regular poin...
从std::vector中删除多个对象？这是我的问题，假设我有一个带有整数的std::vector。将矢量的当前最后一...
[1]http://www.cplusplus.com/reference/vector/vector/[2]http://www.douban.com/note/519323224/
// vector::get_allocator#include <iostream>#include <vector>intmain () { std::vector<int> myvector;int* p;unsignedinti;// allocate an array with space for 5 elements using vector's allocator:p = myvector.get_allocator().allocate(5);// construct values in-place on the array:for(i=...
VS2015里带的vector的push_back是有判断的，而emplace_back没有实际上vector能取得自身元素的引用，就...
// vector::front#include <iostream>#include <vector>intmain () { std::vector<int> myvector; myvector.push_back(78); myvector.push_back(16);// now front equals 78, and back 16myvector.front() -= myvector.back(); std::cout <<"myvector.front() is now "<< myvector.front() ...
http://www.cplusplus.com/reference/vector/vector/push_back/Hope this could be help of you.Best Regards, Sera YuMSDN Community Support Please remember to click "Mark as Answer" the responses that resolved your issue, and to click "Unmark as Answer" if not. This can be beneficial to other...