用C++製作一個販賣紀錄器:

#include <iostream>
#include <string>

int main() {
  // 宣告變數
  std::string client;
  std::string fruit;
  std::string phone_number;
  double rate;
  double fee;
  double fruit_price;
  double total_amount;

  // 讓使用者輸入資料
  std::cout << "請輸入顧客名稱：";
  std::cin >> client;
  std::cout << "請輸入購買水果名稱（apple、banana 或 orange）：";
  std::cin >> fruit;
  std::cout << "請輸入手機號碼：";
  std::cin >> phone_number;
  std::cout << "請輸入稅金（百分比）：";
  std::cin >> rate;
  std::cout << "請輸入手續費：";
  std::cin >> fee;

  // 根據購買的水果種類計算價格
  if (fruit == "apple") {
    fruit_price = 10;
  } else if (fruit == "banana") {
    fruit_price = 20;
  } else if (fruit == "orange") {
    fruit_price = 30;
  }

  // 計算總金額
  total_amount = fee + (fruit_price * rate) + fruit_price;

  // 顯示結果
  std::cout << "顧客名稱：" << client << std::endl;
  std::cout << "手機號碼：" << phone_number << std::endl;
  std::cout << "購買水果：" << fruit << std::endl;
  std::cout << "水果價格：" << fruit_price << "$" << std::endl;
  std::cout << "手續費：" << fee << "$" << std::endl;
  std::cout << "總金額：" << total_amount << "$" << std::endl;

  return 0;
}