Map - equal_range()

소스)

#include<iostream>
#include<string>
#include<map>
 
void print(std::map<int, std::string> Target_Map)
{
    for (std::map<int, std::string>::iterator IterPos = Target_Map.begin(); IterPos != Target_Map.end(); ++IterPos)
        std::cout << "Key->" << IterPos->first << ", Value->" << IterPos->second << "   ";
    std::cout << std::endl;
}
void print(std::pair<int, std::string> Target_Pair)
{
    std::cout << Target_Pair.first << "  " << Target_Pair.second << std::endl;
}
void main()
{
    std::map<int, std::string> Map;
    Map[1] = "First";
    Map[2] = "Second";
    Map[3] = "Third";
    Map[4] = "Fourth";
 
    print(Map);
    print(*Map.equal_range(2).first); print(*Map.equal_range(2).second);
    print(Map);
}

내용)

equal_range(x)함수는 first로 lower_bound(x)를 second로 upper_bound(x)를 리턴합니다.

결과)