问修改传递给该函数内部变量函数的参数

EN

#include <iostream>
#include <sstream>
#include <string>

template<typename... ArgTypes>
void get_numbers_from_line_variadic(std::string line, ArgTypes&... args)
{
   std::istringstream iss(line);

   for (auto& arg : {args...})
      iss >> arg;
}

void get_numbers_from_line(std::string line, int& a, int& b)
{
    std::istringstream iss(line);
    iss >> a;
    iss >> b;
}

int main()
{
    int a, b;
    get_numbers_from_line("1 2", a, b);
    get_numbers_from_line_variadic("1 2", a, b);

    std::cout << "a = " << a << std::endl;
    std::cout << "b = " << b << std::endl;
}