Return iterator to lower bound (function template ) upper_bound Return iterator to upper bound (function template ) equal_range Get subrange of equal elements (function template ) binary_search Test if value exists in sorted sequence (function template ...
std::ranges::binary_searchdoesn't return an iterator to the found element when an element whose projection equalsvalueis found. If an iterator is desired,std::ranges::lower_boundshould be used instead. Feature-testmacroValueStdFeature __cpp_lib_algorithm_default_value_type202403(C++26)List-init...
template <classForwardIterator,classT>boolbinary_search ( ForwardIterator first, ForwardIterator last,constT&value ); template<classForwardIterator,classT,classCompare>boolbinary_search ( ForwardIterator first, ForwardIterator last,constT& value, Compare comp ); 可以看到binary_search的迭代器是前向迭代...
问std::binary_search的自定义比较函数EN这段代码有什么问题吗？一、背景介绍： 函数指针始终不太灵活，...
Return value1-4) Iterator to the beginning of first occurrence of the sequence [s_first, s_last) in the range [first, last). If no such occurrence is found, last is returned. If [s_first, s_last) is empty, first is returned. (since C++11) ...
#include <iostream>#include int main() {// 创建并初始化一个mapstd::map<std::string, int> m = { {"Alice", 25}, {"Bob", 22}, {"Charlie", 30} };// 插入元素// std::pair<iterator,bool> insert (const value_type& val);m.insert(std::make_pair("David", 32));// 查找元素...
std::binary_search 在排序的vector中进行二分查找; std::binary_search(v.begin(),v.end(),v.element_type_obj,compare); std::unique 将排序的vector vector<element_type>::iterator iter = std::unique(v.begin(),v.end(),compare); v.resize(iter-v.begin()); ...
#include<string>#include<algorithm>#include<iostream>#include<vector>template<typename Container>boolin_quote(constContainer&cont,conststd::string&s){returnstd::search(cont.begin(),cont.end(),s.begin(),s.end())!=cont.end();}intmain(){std::string str="why waste time learning, when ignora...
#include <vector> #include <iostream> template <typename T> typename std::vector<T>::iterator binary_search(std::vector<T>& vec, const T& target) { auto left = vec.begin(); auto right = vec.end(); while (left != right) { auto mid...
ptr; } bool operator==(const FaultyIterator& other) const { return ptr == other.ptr; } private: const int* ptr; bool fail_after; int count; }; int main() { int arr[] = {1, 2, 2, 2, 3}; try { auto it = std::search_n( FaultyIterator(arr, true), FaultyIterator(arr +...