std::async的使用总结

https://blog.csdn.net/weixin_41191739/article/details/113115847

vecotr<...>    async  其中的一种用法：

#include <iostream>
#include <vector>
#include <string>
#include <future>
#include <algorithm>

using namespace std;

string flip(string s) {
	reverse(begin(s), end(s));
	return s;
}

int main() {
	vector<future<string>> v;

	v.push_back(async([]{ return flip(" ,olleH"); }));
	v.push_back(async([]{ return flip(".gnaL"); }));
	v.push_back(async([]{ return flip("\n!TXEN"); }));

	for (auto& e : v) {
		cout << e.get();
	}
}