c++中的std::tuple元组怎么用_c++ tuple多值返回与解包示例

#include <tuple>
#include <iostream>

// 创建 tuple
auto t1 = std::make_tuple(10, 3.14, "hello");
std::tuple<int, double, std::string> t2(42, 2.71, "world");

std::tuple<int, int, double> divideWithRemainder(int a, int b) {
    if (b == 0) return {0, 0, 0.0};
    int quotient = a / b;
    int remainder = a % b;
    double ratio = static_cast<double>(a) / b;
    return std::make_tuple(quotient, remainder, ratio);
}

auto result = divideWithRemainder(10, 3);
int q = std::get<0>(result); // 商
int r = std::get<1>(result); // 余数
double d = std::get<2>(result); // 比值

auto [quotient, remainder, ratio] = divideWithRemainder(10, 3);
std::cout << "商: " << quotient 
          << ", 余数: " << remainder 
          << ", 比值: " << ratio << "\n";

int q, r;
double d;
std::tie(q, r, d) = divideWithRemainder(10, 3);

std::tie(q, std::ignore, d) = divideWithRemainder(10, 3); // 忽略余数