ret= std::equal_range(vec_i.begin(),vec_i.end(),1); 2.set_difference 算法set_difference可以用来求两个集合的差集,此处的集合可以为std::set,也可以是std::multiset,但是不可以是hash_set以及hash_multiset。为什么呢?因为set_difference要求两个区间必须是有序的(从小到大排列),std::set和std::multis...
{2,5,7};std::vector<int>diff;std::set_difference(v1.begin(), v1.end(), v2.begin(), v2.end(),std::inserter(diff, diff.begin()));std::cout<<v1<<" ∖ "<<v2<<" == "<<diff<<"\n\n";// 我们想知道新订单和旧订单相比“砍掉了”哪些:std::vector<Order>old_orders{{1...
ForwardIt3 set_difference(ExecutionPolicy&&policy, ForwardIt1 first1, ForwardIt1 last1, ForwardIt2 first2, ForwardIt2 last2, ForwardIt3 d_first, Compare comp); (4)(C++17 起) 复制来自已排序范围[first1, last1)并且不在已排序范围[first2, last2)中找到的元素到始于d_first的范围。
ForwardIt3 set_difference( ExecutionPolicy&& policy, ForwardIt1 first1, ForwardIt1 last1, ForwardIt2 first2, ForwardIt2 last2, ForwardIt3 d_first, Compare comp );(4)(C++17 起) 复制来自已排序范围[first1, last1)并且不在已排序范围[first2, last2)中找到的元素到始于d_first的范围。
set_difference (3) template<classInputIt1,classInputIt2,classOutputIt,classCompare>OutputIt set_difference(InputIt1 first1, InputIt1 last1, InputIt2 first2, InputIt2 last2, OutputIt d_first, Compare comp){while(first1!=last1){if(first2==last2)returnstd::copy(first1, last1, d_first...
<< " "; } }; void test01() { vector<int> v1 = {1,2,3,4,5,6}; vector...
constexpr OutputIt set_difference( InputIt1 first1, InputIt1 last1, InputIt2 first2, InputIt2 last2, OutputIt d_first ); (C++20 起) template< class ExecutionPolicy, class ForwardIt1, class ForwardIt2, class ForwardIt3 > ForwardIt3 set_difference( ExecutionPolicy&& policy, ForwardIt1 ...
一、背景介绍: 函数指针始终不太灵活,它只能指向全局或静态函数,对于类成员函数、lambda表达式或其他可...
std::ranges::set_difference,std::ranges::set_difference_result Defined in header<algorithm> Call signature template<std::input_iteratorI1,std::sentinel_for<I1>S1, std::input_iteratorI2,std::sentinel_for<I2>S2, std::weakly_incrementableO,classComp=ranges::less, ...