map和piair的几种用法

#include <iostream>
#include <vector>
#include <string>
#include <stack>
#include <utility>
#include <map>
using namespace std;

int main()
{
	pair<string, int> sipr;
	string str("hello");
	int var = 1;
	vector< pair<string, int> > pvec;

	/*
    // 方法1 
	sipr = make_pair(str, var);
	pvec.push_back(sipr);
	*/

	/*
	// 方法2
	pair<string, int> sipr2(str, var);
	pvec.push_back(sipr2);
	*/

	/*
	// 方法3 直接生产pair对象
	sipr.first = str;
	sipr.second = var;
	pvec.push_back(sipr);
	*/

	//pvec.push_back(pair<string, int>::value_type(str, var));
	//cout << pvec[0].first << " " << pvec[0].second << endl;
	

	/*
	// 方法4
	map<string, int> myMap;
	myMap.insert(map<string, int>::value_type(str, var));
	map<string, int>::const_iterator iter = myMap.begin();
	cout << iter->first << " " << iter->second << endl;	
	*/

	/*
	map<string, int> myMap;
	myMap.insert(make_pair(str,var));
	map<string, int>::const_iterator iter = myMap.begin();
	cout << iter->first << " " << iter->second << endl;	
	*/


	map<string, int> myMap;
	pair<map<string, int>::iterator, bool> ret = myMap.insert(make_pair(str,var));
	cout << ret.first->first << endl;
	cout << ret.first->second << endl;
	

	return 0;
}