结构化绑定提供了多返回值的功能，这是C++17提供的新语法糖。

#include <iostream>
#include <tuple>

std::tuple<int, double, std::string> f() {
    return make_tuple(1, 1.0, "test");
}
int main() {
    auto [x, y, z] = f();
    std::cout << x << ", " << y << "," << z;
    return 0;
}

1, 1,test


#include <tuple>
#include <iostream>

int main() {
    std::tuple<int, float, std::string> myTuple(42, 3.14f, "Hello");

    int a;
    float b;
    std::string c;

    std::tie(a, b, c) = myTuple;

    std::cout << "a: " << a << std::endl;
    std::cout << "b: " << b << std::endl;
    std::cout << "c: " << c << std::endl;

    return 0;
}