首先来介绍元组的创建和元组元素的访问。通过make_tuple()创建元组，通过get<>()来访问元组的元素。通过下面这段程式来认识这两个函式的用法：

#include <iostream>

#include <tuple>

#include <functional>

int main()

{

auto t1 = std::make_tuple(10, "Test", 3.14);

std::cout << "The value of t1 is "

<< "(" << std::get<0>(t1) << ", " << std::get<1>(t1)

<< ", " << std::get<2>(t1) << ")\n";

int n = 1;

auto t2 = std::make_tuple(std::ref(n), n);//ref表示引用

n = 7;

std::cout << "The value of t2 is "

<< "(" << std::get<0>(t2) << ", " << std::get<1>(t2) << ")\n";

}

运行结果为：

The value of t1 is (10, Test, 3.14)

The value of t2 is (7, 1)