std::vector<int>::iterator iter = nVec.begin(); for(; iter != nVec.end();) { if(*iter == 0) iter = nVec.erase(iter); else iter++; } 删除容器内某一个特定的元素,编写方式可为: std::vector<int>::iterator iter = std::find(nVec.begin(),nVec.end(),5); if(iter != nVec.e...
//std::vector<decltype(vi.begin())>iter_vector; std::vector<std::vector<int>::iterator> iter_vector; for (auto it = vi.begin(); it != vi.end(); ++it) { iter_vector.push_back(it); } auto pos = vi.begin(); pos++; std::vector<int>::iterator ret; ret = vi.insert(pos,...
for(vector<int>::iterator it=arr.begin(); it!=arr.end(); ){if(* it ==0) { it=arr.erase(it); }else{++it; } } 4、存放智能指针的问题 ①、vector保存原始指针:vector析构时不会释放指针指向的堆对象 ②、vector保存智能指针:vector析构时会释放智能指针所指向的对象,但是如果将所有权转移给...
Template>:std::true_type{};intmain(){constexprboolis_vec=is_specialization<std::vector<int>,st...
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cout<<"Elements in vector:";for(inti=0;i<vec.size();++i){std::cout<<" "<<vec[i];}std::cout<<std::endl;// 使用迭代器遍历 vector 容器并打印每个元素std::cout<<"Elements in vector (using iterator):";for(std::vector<int>::iteratorit=vec.begin();it!=vec.end();++it){std::...
vector<bool> space-efficient dynamic bitset (class template specialization) Iterator invalidation OperationsInvalidated All read only operationsNever. swap,std::swapend() clear,operator=,assignAlways. reserve,shrink_to_fitIf the vector changed capacity, all of them. If not, none. ...
std::vector (1) iterator erase(iterator pos); (until C++11) iterator erase(const_iterator pos); (since C++11) (constexpr since C++20) (2) iterator erase(iterator first, iterator last); (until C++11) iterator erase(const_iterator first, const_iterator last); ...
1：array 定义的时候必须定义数组的元素个数;而vector 不需要；且只能包含整型字面值常量，枚举常量或者...
~vector(); Vector destructor Destroys the container object. C++98 C++11 This destroys all container elements, and deallocates all the storagecapacityallocated by thevectorusing itsallocator. Complexity Linear invector::size(destructors). Iterator validity ...