clear the content of a map with clear() function : map erase « map multimap

clear the content of a map with clear() function : map erase « map multimap « C++ Tutorial

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C++ Tutorial » map multimap » map erase

23.4.3.clear the content of a map with clear() function

#include <map>

#include <iostream>

#include <string>



using namespace std;



typedef map<string, int> STRING2INT;



int main(void)

{

    STRING2INT DateMap;

    STRING2INT::iterator DateIterator;

    string DateBuffer;



    DateMap["January"] = 1;

    DateMap["February"] = 2;

    DateMap["March"] = 3;

    DateMap["April"] = 4;

    DateMap["May"] = 5;

    DateMap["June"] = 6;

    DateMap["July"] = 7;

    DateMap["August"] = 8;

    DateMap["September"] = 9;

    DateMap["October"] = 10;

    DateMap["November"] = 11;

    DateMap["December"] = 12;



    // empty DateMap - note that clear simply calls erase(begin(),end());

    DateMap.clear();



    if(!DateMap.empty())

        cout << "DateMap has " << DateMap.size() << " entries" << endl;

    else

        cout << "DateMap is empty" << endl;



}

23.4.map erase
	23.4.1.	Remove an entry from a map
	23.4.2.	clear the content of a map with erase(Map.begin(), Map.end());
	23.4.3.	clear the content of a map with clear() function
	23.4.4.	Erase a found pair from map

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