copy_if函数使用了一个lambda表达式作为条件,即只有当字符为大写字母时才会进行复制。最后,我们输出了复制后的字符串destination。 copy_if函数的用法如下: 代码语言:txt 复制 std::copy_if(InputIt first, InputIt last, OutputIt d_first, UnaryPredicate pred); first, last:表示输入范围的迭代器,...
std::copy(from_vector.begin(), from_vector.end(), std::back_inserter(to_vector));//or, alternatively,//std::vector<int> to_vector(from_vector.size());//std::copy(from_vector.begin(), from_vector.end(), to_vector.begin());//either way is equivalent to//std::vector<int> to_...
std::copy(all.begin(), all.end(),std::back_inserter(dstVect)); std::cout<<"拷贝全部测试数据:"<<std::endl; printVector(dstVect); // 只拷贝偶数(即结果是偶数集) std::vector<int> even; std::copy_if(std::begin(all),std::end(all),std::back_inserter(even), [&](autoitem)->bo...
std::copy,std::copy_if 在标头<algorithm>定义 template<classInputIt,classOutputIt> OutputIt copy(InputIt first, InputIt last, OutputIt d_first); (1)(C++20 起为constexpr) template<classExecutionPolicy, classForwardIt1,classForwardIt2>
在C + + STL | std 中复制的不同方法: copy ()、 copy _ n ()、 copy _ if ()、 copy _ back (),这个函数有4个参数,其中3个类似于copy(),还有一个附加函数,当返回true时
std::find_end std::find_first_of std::search_n std::lexicographical_compare std::lexicographical_compare_three_way std::copy, std::copy_if std::copy_n std::copy_backward std::move std::move_backward std::shift_left, std::shift_right std::fill std::fill_n std::generate std::genera...
std::clamp std::copy std::copy_backward std::copy_if std::copy_n std::count std::count_if std::equal std::equal_range std::exclusive_scan std::execution::par std::execution::parallel_policy std::execution::parallel_unsequenced_policy ...
doublethreshold =23.33;std::vector<MyStruct> myvectorResult2;std::copy_if( myvector.begin( ), myvector.end( ),std::back_inserter( myvectorResult2 ), [=](constMyStruct& d ) {returnd.Price < threshold; } ); Dec 22, 2023, 3:49 AM ...
std::indirect_unary_predicate<std::projected<I, Proj>>Pred> requiresstd::indirectly_copyable<I, O> constexprcopy_if_result<I, O> copy_if(I first, S last, O result, Pred pred, Proj proj={}); (3)(since C++20) template<ranges::input_rangeR,std::weakly_incrementableO, ...
());std::replace_copy_if(src.cbegin(), src.cend(), dst.begin(),[](shortn){returnn>5;},0);println(dst);std::vector<std::complex<double>>src2{{1,3},{2,4},{3,5}}, dst2(src2.size());println(src2);#ifdef __cpp_lib_algorithm_default_value_typestd::replace_copy_if(src...