C++17 好用的 tuple 的 auto 解構

聽 Gemini 說這功能是在 C++17 之後才有的。

#include <iostream>
#include <vector>
#include <tuple>

using namespace std;

int main()
{
	vector<tuple<int,int,double>> box;
	for (int i{1}; i < 10; ++i)
		box.push_back(make_tuple(i, i*i, (double)i/(i*i)));
	for (auto [idx, square, value]: box)
		cout << idx << " " << square << " " << value << endl;
	while (!box.empty()) {
		auto [idx, square, value] = box.back();
		box.pop_back();
		cout << idx << " " << square << " " << value << endl;
	}
	return 0;
}