std::forward_list<T,Allocator>::end, std::forward_list<T,Allocator>::cend
来自 cppreference.com
iterator end() noexcept; |
(1) | (自 C++11 起) |
const_iterator end() const noexcept; |
(2) | (自 C++11 起) |
const_iterator cend() const noexcept; |
(3) | (自 C++11 起) |
返回指向 forward_list
最后一个元素之后的元素的迭代器。
此元素充当占位符;尝试访问它会导致未定义的行为。
内容 |
[编辑] 参数
(无)
[编辑] 返回值
指向最后一个元素之后的元素的迭代器。
[编辑] 复杂度
常数。
[编辑] 示例
运行此代码
#include <algorithm> #include <iostream> #include <numeric> #include <string> #include <forward_list> int main() { std::forward_list<int> nums{1, 2, 4, 8, 16}; std::forward_list<std::string> fruits{"orange", "apple", "raspberry"}; std::forward_list<char> empty; // Print forward_list. std::for_each(nums.begin(), nums.end(), [](const int n) { std::cout << n << ' '; }); std::cout << '\n'; // Sums all integers in the forward_list nums (if any), printing only the result. std::cout << "Sum of nums: " << std::accumulate(nums.begin(), nums.end(), 0) << '\n'; // Prints the first fruit in the forward_list fruits, checking if there is any. if (!fruits.empty()) std::cout << "First fruit: " << *fruits.begin() << '\n'; if (empty.begin() == empty.end()) std::cout << "forward_list 'empty' is indeed empty.\n"; }
输出
1 2 4 8 16 Sum of nums: 31 First fruit: orange forward_list 'empty' is indeed empty.
[编辑] 另请参阅
返回指向开头的迭代器 (公有成员函数) | |
(C++11)(C++14) |
返回指向容器或数组结尾的迭代器 (函数模板) |