lower_boundperforms at mostlog(last - first) + 1comparisons. Example // // ul_bound.cpp // #include <vector> #include <algorithm> #include <iostream> using namespace std; int main() { typedef vector<int>::iterator iterator; int d1[11] = {0,1,2,2,3,4,2,2,2,6,7}; // Se...
// alg_lower_bound.cpp // compile with: /EHsc #include <vector> #include <algorithm> #include <functional> // For greater<int>( ) #include <iostream> // Return whether modulus of elem1 is less than modulus of elem2 bool mod_lesser ( int elem1, int elem2 ) { if ( elem1 < 0...
下面是一个声明比较器的例子,针对以pair<int, string>为元素的vector进行按照第一个元素降序排列: #include<vector>#include<utility>#include<algorithm>#include<iostream>boolcompare(conststd::pair<int, std::string>& p1,conststd::pair<int, std::string>& p2){returnp1.first > p2.first; }intmain(...
#include<bits/stdc++.h>usingnamespacestd;intmain(){vector<int> arr{6,5,9,12,4};//sort before usinglower_bound()sort(arr.begin(), arr.end());intsearching_element =6;vector<int>::iterator it; it =lower_bound(arr.begin(), arr.end(), searching_element);//if all eleemnts are s...
__cpp_lib_algorithm_default_value_type202403(C++26)List-initializationfor algorithms(1,2) Example Run this code #include <algorithm>#include <cassert>#include <complex>#include <iostream>#include <vector>structPriceInfo{doubleprice;};intmain(){conststd::vector<int>data{1,2,4,5,5,6};for(...
代码语言:cpp 复制 #include<iostream>#include<vector>usingnamespacestd;intmain(void){inta[]={3,1,2,3,4};vector<int>v(a,a+5);//for (vector<int>::iterator it=v.begin(); it!=v.end(); ++it)//{// if (*it == 3)// v.erase(it); ERROR!// else// cout<<*it<<' ';//...
It is PAST the last element of the vector. https://en.cppreference.com/w/cpp/container/vector/end 55 is greater than any of the elements in your vector.std::vector::end()would indicate search failed, value not found. Topic archived. No new replies allowed....
lower_bound函数的返回值含义: lower_bound返回一个迭代器,指向范围内第一个不小于给定值的元素。如果范围内有多个元素不小于给定值,返回的迭代器指向这些元素中的第一个。 简单的C++示例代码,展示lower_bound的使用和返回值: cpp #include <iostream> #include <vector> #include <algorithm...
比如vector _rows中已经有了{0,1,3,5}这是要放入4,则std::lower_bound( _rows.begin(), _rows.end(),4);将会返回5,就是应该插入的那个位置后面的那个 #include i++ ios 原创 Stven_King 2022-08-23 09:37:51 133阅读 lower_bound()函数 头文件 函数简介 lower_bound()返回一个 iterator 它...
int binarySearch(vector<int>& nums, int target) { /// return index of first one that comp(item,target)==true, or nums.size() if not found /// comp is greater or equal to for lower_bound /// comp is greater for upper_bound int first=0, last=nums.size(), mid; while (first<...