#include <array> struct X { X(int){} }; int main() { auto x = std::array<X, 0>{}; } The following compiler errors are returned: [x64 msvc v19.15 (VS 15.8) #1] error C2512: ‘std::array<X,0>’: no appropriate default constructor available [x64 msvc v19.15 (VS 1...
std::array<int, 5> arr1; // 默认构造函数,数组元素未初始化 std::array<int, 5> arr2{1, 2, 3, 4, 5}; // 使用元素值初始化的构造函数 std::array<int, 5> arr3(arr2); // 使用拷贝构造函数,将arr2的元素拷贝到arr3中 std::array<int, 5> arr4(arr2.begin(), arr2.end()); /...
由于C++兼容于C,为了用C++维护以前用C写的程序,可能会遇到用C写的array,但C++的std::vector远比array好用,所以可能必须将array转成std::vector继续维护,以下的程序demo如何将array转成std::vector。 1 /* 2 (C) OOMusou 2006http://oomusou.cnblogs.com 3 4 Filename : ArrayToVectorByConstructor.cpp 5 ...
array的出现代表着C++的代码更进一步“现代化”,就像std::string的出现代替了c风格字符串并且能和STL配合工作一样,array的出现则将取代语言内置的数组以及c风格的数组字符串,它提供了data()接口,使得能够获得内部数组的首地址,它提供了size(), 能够得其固定的长度,使得C++的数组也可以像Java等语言那样知道自己的leng...
Fixed-size aggregate:The container uses implicit constructors and destructors to allocate the required space statically. Its size is compile-time constant. No memory or time overhead. Template parameters T:Type of the elements contained. Aliased as member type array::value_type. ...
std::size_tN>classarray{public:T_data[N];// No initializer here// No constructor here// No...
std::array<int,100>a;a.fill(18);std::array<std::array<int,100>,100>aa;aa.fill(a);//...
问使用std::array<>的构造函数委托ENstd::array没有(任何)显式声明的构造函数，因此，它没有来自初始...
(constructor) (implicitly declared) initializes the array following the rules ofaggregate initialization(note that default initialization may result in indeterminate values for non-classT) (public member function) (destructor) (implicitly declared) ...
std::cout << "\nExample constructor(2)...\n"; { std::unique_ptr<Foo> up2(new Foo); //up2 now owns a Foo } // Foo deleted std::cout << "\nExample constructor(3)...\n"; D d; { // deleter type is not a reference ...