#include<iostream>

#include<string>

#include<map>

using namespace std;

// pair简单讲就是将两个数据整合成一个数据

// 本质上是有first, second两个成员变量的结构体

int main()

{

	// pair两种构造的方法

	// 方法1

	pair<string, double> pA("one", 1.11);// 浮点数默认是double, float的话有会警告。

// 方法2

	pair<string, int> pB;

	pB = make_pair("two", 2);

	// pair的输出

	cout << "pA : " << pA.first << "  "<< pA.second << endl;

	cout << "pB : " << pB.first << "  "<< pB.second << endl;

	// 结合map的使用

	map<string, double> mA;

	map<string,int>mB;

	mA.insert(pA);

	mB.insert(pB);

	for (map<string, double>::iterator it = mA.begin(); it != mA.end(); ++it)

	{

		cout << "First Member of mA:  " << it->first << endl;

		cout << "Second Member of mA: " << it->second << endl;

	}

	for (map<string, int>::iterator it = mB.begin(); it != mB.end(); ++it)

	{

		cout << "First Member of mB:  " << it->first << endl;

		cout << "Second Member of mB: " << it->second << endl;

	}

	return 0;

}

#include<algorithm>

#include<iostream>

#include<sstream>

#include<cstring>

#include<cstdio>

#include<vector>

#include<string>

#include<map>

#include<set>

using namespace std;

map<string, int> m;

pair<string,int> p;

int main() {

    p = make_pair("one",1);//make_pair(),返回一个pair类型

    cout << p.first << endl;//输出p的key，也就是"one";

    cout << p.second << endl;//输出p的value，也就是1

    m.insert(make_pair("two",2));

    map<string, int>::iterator mit;

    mit = m.begin();

    cout << mit->first << endl;

    cout << mit->second << endl;//分别输出“two”。和2

    return 0;

}

#include <iostream>

#include <string>

#include <vector>

using namespace std;

int main()

{

    pair<string, string> anon;    // 包括两个字符串

    pair<string, int> word_count; // 包括字符串和整数

    pair<string, vector<int> > line; // 包括字符串和一个int容器

    pair<string, string> author("James", "Joyce"); // 定义成员时初始化

    cout << author.first << " - " << author.second << endl;

    string firstBook;             // 使用 . 訪问和測试pair数据成员

    if (author.first == "James" && author.second == "Joyce") {

        firstBook = "Stephen Hero";

        cout << firstBook << endl;

    }

    typedef pair<string, string> Author; // 简化声明一个作者pair类型

    Author proust("Marcel", "Proust");

    Author Joyce("James", "Joyce");

    pair<string, string> next_auth;

    string first, last;

    while (cin >> first >> last) {

        // 使用make_pair函数生成一个新pair对象

        next_auth = make_pair(first, last);

        // 使用make_pair函数，等价于以下这句

        next_auth = pair<string, string> (first, last);

        cout << next_auth.first << " - " << next_auth.second << endl;

        if (next_auth.first == next_auth.second)

            break; // 输入两个相等,退出循环

    }

    cout <<  "由于pair的数据成员是共同拥有的。因而能够直接读取输入" << endl;

    while (cin >> next_auth.first >> next_auth.second) {

        cout << next_auth.first << " - " << next_auth.second << endl;

        if (next_auth.first == next_auth.second)

            break;

    }

    return 0;

}

临时仅仅会这么简单的使用方法。刚学到的……