一个典型的例子就是 std::vector ,其构造器会直接取传入对象的内存地址来接管这个对象本身,而不会再重新分配一块新的内存,再把每个元素都挨个复制一遍。 移动构造器也允许传递所有权,类似于 std::unique_ptr。 也可以通过重载赋值运算符,将一次性对象赋值给一个对象: class MyClass { public: // ... My...
(constructor) constructs the vector (public member function of std::vector<T,Allocator>) (destructor) destructs the vector (public member function of std::vector<T,Allocator>) operator= assigns values to the container (public member function of std::vector<T,Allocator>) assign as...
const_reverse_iteratorstd::reverse_iterator<const_iterator> Member functions (constructor) constructs thevector (public member function) (destructor) destructs thevector (public member function) operator= assigns values to the container (public member function) ...
(constructor) constructs the reference. Accessible only to std::vector<bool, Alloc> itself (public member function) (destructor) destroys the reference (public member function) operator= assigns a bool to the referenced bit (public member function) operator bool returns the referenced...
#include <iostream>#include<string>#include<vector>usingnamespacestd;classnumbered{public: numbered(){//构造函数mysn =0; } numbered(constnumbered& inputOne){//拷贝构造函数mysn =inputOne.mysn; mysn= mysn +1; }intmysn; };voidf(numbered s){ ...
std::vector<int, MyAllocator<int>> vec; vec.push_back(42);return0; } 在使用的时候,只需要自己定义好value_typepointerallocate和deallocate 使用例子,动态分配vector内存,但是是32对齐: #include<new>#include<iostream>#include<vector>template<typenameT>classMyAllocator{public:usingvalue_type = T;MyAllo...
const_reverse_iteratorstd::reverse_iterator<const_iterator> Member functions (constructor) constructs thevector (public member function) (destructor) destructs thevector (public member function) operator= assigns values to the container (public member function) ...
std::vector<int> v = { 1, 2, 3, 4, 5, 6 }; int even_count = 0; for_each(v.begin(), v.end(), [&even_count](int val){ if(!(val & 1)){ ++ even_count; } }); std::cout << "The number of even is " << even_count << std::endl;大部分STL算法,可以非常灵活地...
vector<int>vec(6,10); vector<int>::iterator iter=vec.iterator();autoiterAuto = vec.iterator();//相比较更方便 1.3,统一初始化语法 C++ 11 使用统一的大括号表示初始化 std::strings("hello");intm=int();//默认初始化 default initialization ...
append({6, 7, 8}); // 函数调用中的列表初始化 std::cout << "The vector size is now " << s.c_arr().second << " ints:\n"; for (auto n : s.v) std::cout << n << ' '; std::cout << '\n'; std::cout << "Range-for over brace-init-list: \n"; for (int x ...