C++ 函数的未来展望：新特性将如何改变代码编写方式？

#include <vector>
#include <algorithm>

int main() {
  std::vector<int> numbers = {1, 2, 3, 4, 5};
  std::vector<int> squared_numbers;

  // 使用 lambda 表达式将每个数字平方
  std::transform(numbers.begin(), numbers.end(), std::back_inserter(squared_numbers), [](int n) { return n * n; });

  // 打印平方后的数字
  for (int n : squared_numbers) {
    std::cout << n << std::endl;
  }

  return 0;
}

#include <tuple>

struct Salary {
  int yearly_salary;
  int monthly_salary;
};

int main() {
  // 创建 Salary 结构
  Salary salary = {50000, 4166};

  // 使用结构化绑定解构结构
  auto [yearly, monthly] = salary;

  // 打印年薪和月薪
  std::cout << "Yearly salary: " << yearly << std::endl;
  std::cout << "Monthly salary: " << monthly << std::endl;

  return 0;
}

#include <concepts>

template <typename T>
concept Comparable = requires(T a, T b) {
  { a < b } -> bool;
  { a > b } -> bool;
  { a == b } -> bool;
  { a <= b } -> bool;
  { a >= b } -> bool;
};

template <Comparable T>
T find_max(T a, T b) {
  return (a > b) ? a : b;
}

#include <array>

int main() {
  std::array<int, 5> numbers = {1, 2, 3, 4, 5};

  // 使用范围 for 循环遍历数组
  for (int number : numbers) {
    std::cout << number << std::endl;
  }

  return 0;
}