代码语言:cpp 复制 #include<iostream>#include<map>intmain(){// 创建一个整数到字符串的映射std::map<int,std::string>m;// 插入元素m[1]="one";m[2]="two";m[3]="three";// 查找元素std::string result=m[2];// result为"two"// 删除元素m.erase(1);
/** * @FileName map_del_str.cpp * @Describe A simple example for deleting an element of string in map. * @Author vfhky 2016-06-26 10:26https://typecodes.com/cseries/mapdelintstring.html* @Compile g++ map_del_str.cpp -o map_del_str * @Reference */ #include <iostream> #includ...
For insertion of an element constructed in place—that is, no copy or move operations are performed—see map::emplace and map::emplace_hint. Example c++ Copy // map_insert.cpp // compile with: /EHsc #include <map> #include <iostream> #include <string> #include <vector> #include <uti...
The third member function inserts the sequence of element values into a map corresponding to each element addressed by an iterator of in the range [_First, _Last) of a specified set. Example 复制 // map_insert.cpp // compile with: /EHsc #include <map> #include <iostream> int main( ...
// cliext_map_insert.cpp // compile with: /clr #include <cliext/map> typedef cliext::map<wchar_t, int> Mymap; typedef Mymap::pair_iter_bool Pairib; int main() { Mymap c1; c1.insert(Mymap::make_value(L'a', 1)); c1.insert(Mymap::make_value(L'b', 2)); c1.insert(My...
下面展示了常用的一些方法。<p>// stu_map.cpp : 定义控制台应用程序的入口点。 // #include "stdafx.h" #include <iostream> #include <map> usingnamespace std; bool fncomp(char lhs,char rhs) { return lhs<rhs; } struct classcomp
在map中插入一个元素,map中记录的元素通常为键值对,所以,在存储时会把,键和值封装成pair然后进行插入,例如:phone.insert(pair<string,string>(name,number));其中name和number为string类型的变量。当然也可以简单的写成phone[name]=number;此处phone即为map<string,string>类型的变量。因为map在实现过程中对[]进行...
const_referencetop()const;2.移除队首元素voidpop();3.元素入列voidpush(constvalue_type&value);具体成员函数列表...https://en.cppreference.com/w/cpp/container/priority_queue代码案例基础初始化，push(),pop()操作#include<queue>#include<iostream>// Print all element in the queue in ordervoidprint...
可以根据insert的返回值判断释放插入成功 The single element versions (1) return apair, with its memberpair::firstset to an iterator pointing to either the newly inserted element or to the element with an equivalent key in themap. Thepair::secondelement in thepairis set totrueif a new element...
set.insert({2, -1, 9}); // {0} {1} {2} {9} {-1} for(const auto& key : set) { std::cout << "{" << key << "}" << std::endl; } } 异构查找 异构重载允许使用除 Key 之外的其他类型进行查找和擦除操作,只要所使用的类型是可散列的并且与 Key 具有可比性。