3)find_if搜索谓词p对其返回true的元素。 5)find_if_not搜索谓词q对其返回false的元素。 2,4,6)同(1,3,5),但按照policy执行。 这些重载只有在满足以下所有条件时才会参与重载决议: std::is_execution_policy_v<std::decay_t<ExecutionPolicy>>是true。
Complexity Constant on average, worst case linear in the size of the container. Notes Feature-testmacroValueStdFeature __cpp_lib_generic_unordered_lookup201811L(C++20)Heterogeneous comparison lookup inunordered associative containers; overloads(3,4) ...
Complexity Constant on average, worst case linear in the size of the container. Notes Feature-testmacroValueStdFeature __cpp_lib_generic_unordered_lookup201811L(C++20)Heterogeneous comparison lookup inunordered associative containers; overloads(3,4) ...
C++ 标准库 std::find 查找 参见:https://en.cppreference.com/w/cpp/algorithm/find 查找指定字符/数字等。 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 #include <iostream> #include <algorithm> #include <vector> #include <iterator> intmain() { intn1 = 3; intn2 = 5;...
cppreference.com Page Discussion std::unordered_set<Key,Hash,KeyEqual,Allocator>::findC++ Containers library std::unordered_set iterator find( const Key& key ); (1) (since C++11) (constexpr since C++26) const_iterator find( const Key& key ) const; (2) (since C++11) (constexpr since...
std::find,std::find_if,std::find_if_not Defined in header<algorithm> (1) template<classInputIt,classT> InputIt find(InputIt first, InputIt last,constT&value); (until C++20) template<classInputIt,classT> constexprInputIt find(InputIt first, InputIt last,constT&value); ...
template<classK>const_iterator find(constK&x)const; (4)(since C++14) 1,2)Finds an element with key equivalent tokey. If there are several elements withkeyin the container, any of them may be returned. 3,4)Finds an element with key that comparesequivalentto the valuex. This overload ...
Dec 23, 2023, 6:24 PM >for what is setprecision? https://cplusplus.com/reference/iomanip/setprecision/ https://en.cppreference.com/w/cpp/io/manip/setprecision Wayne 1 voteReport a concern Question activity Sign in to follow questions and users...
test.cpp:35: error: expected `)' before 'PRIu64' 8) 下面是因为在x86机器(32位)上编译没有指定编译参数-march=pentium4 ../../src/common/libmooon.a(logger.o): In function `atomic_dec_and_test': ../../include/mooon/sys/atomic_gcc.h:103: undefined reference to `__sync_sub_and_...
1)find搜索等于value的元素。 3)find_if搜索谓词p对其返回 true 的元素。 5)find_if_not搜索谓词q对其返回 false 的元素。 2,4,6) 同 (1,3,5) ,但按照policy执行。这些重载仅若std::is_execution_policy_v<std::decay_t<ExecutionPolicy>> (C++20 前)std::is_execution_policy_v<std::remove_cvref...