vector() : vector(Allocator()) {} (since C++11) (until C++17) vector() noexcept(noexcept(Allocator())) : vector(Allocator()) {} (since C++17) (constexpr since C++20) (2) explicit vector( const Allocator& alloc = Allocator() ); (until C++11) explicit vector( const Allocator&...
1、定义vector<vector<int>> A;//错误的定义方式vector<vector<int> > A;//正缺的定义方式2、插入元素若想定义A = [[0,1,2],[3,4,5]],则://正确的插入方式vector<vector<int> > A;//A.push_back里必须是vectorvector<int> B;B.push_back(0);B.push_back(1);B.push_back(2);A.push_ba...
explicit vector( size_type count, const Allocator& alloc = Allocator() ); (3) (C++11 起) (4) explicit vector( size_type count, const T& value = T(), const Allocator& alloc = Allocator() ); (C++11 前) vector( size_type count, const T& value, const Allocator& alloc = Allo...
#10 0x0000000000401595 in std::vector<int, std::allocator<int> >::_M_range_check (this=0x7f35b2851e60, __n=1) at /usr/include/c++/4.8.2/bits/stl_vector.h:794 #11 0x0000000000401313 in std::vector<int, std::allocator<int> >::at (this=0x7f35b2851e60, __n=1) at /usr/includ...
std::vector<T,Allocator>::push_back std::vector<T,Allocator>::assign std::vector<T,Allocator>::get_allocator std::vector<T,Allocator>::operator[] std::vector<T,Allocator>::front std::vector<T,Allocator>::at std::vector<T,Allocator>::pop_back std::vector<T,Allocator>::end, std::...
C++ Containers library std::vector<bool> Defined in header <vector> template< class Allocator > class vector<bool, Allocator>; std::vector<bool> is a possibly space-efficient specialization of std::vector for the type bool. The manner in which std::vector<bool> is made space ...
任何Allocator::allocate()会抛出的异常(典型为std::bad_alloc)。 如果抛出异常,那么此函数无效果(强异常保证)。 如果T的移动构造函数不是noexcept的且T非可复制插入(CopyInsertable)到*this,那么vector将使用移动构造函数。如果它抛出异常,那么摒弃保证,且效果未指定。
存储在堆上,所以array的访问速度更快。std::array定义时固定长度,和数组一样,vector是变动长度。 实例代码 #include <array>intmain...C++标准 1.3.1std::thread类std::是一个线程类,可以传入多个参数的线程函数,不像之前创建线程参数只能是固定的。 #include <thread> void ...
下列代码用 assign 添加数个字符到 std::vector<char> :运行此代码 #include <vector> #include <iostream> int main() { std::vector<char> characters; characters.assign(5, 'a'); for (char c : characters) { std::cout << c << ' '; } characters.assign({'\n', 'C', '+', '+', ...
new_cap-vector 的新容量 类型要求 - T必须满足可移动插入(MoveInsertable)的要求。 返回值 (无) 异常 若new_cap>max_size()则为std::length_error。 任何Allocator::allocate()所抛的异常(典型为std::bad_alloc) 若抛出异常,则此函数无效果(强异常保证)。