map_has_key.cpp

#include <iostream>
#include <map>

using namespace std;

int main()
{
	map<string, int> m;
	m["hello"] = 100;
	
	if( m.count("hello") == 1 ) {
		cout << "m has 'hello'" << endl;
	}
	else {
		cout << "m doesn't have 'hello'" << endl;
	}
}