Map - empty()

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);
    if (Map.empty())
        std::cout << "비었습니다" << std::endl;
    else
        std::cout << "데이터가 있습니다" << std::endl;
    print(Map);
}

내용)

empty()함수는 map이 비었을 떄 true를 리턴합니다.

결과)