// class declaration
class Pump
{
  private:
    float amtInTank;
    float price;
  public:
    Pump(float = 500.0, float = 1.00);     // constructor
    void values(void);
    void request(float);
};

// class implementation
Pump::Pump(float start, float todaysPrice)
{
  amtInTank = start;
  price = todaysPrice;
}
void Pump::values(void)
{
  cout << "The gas tank has " << amtInTank << " gallons of gas." << endl;
  cout << "The price per gallon of gas is $" << setiosflags(ios::showpoint)
       << setprecision(2) << price << endl;
}
void Pump::request(float pumpAmt)
{
  float pumped;

  if (amtInTank >= pumpAmt)
     pumped = pumpAmt;
  else
     pumped = amtInTank;

  amtInTank -= pumped;
  cout << pumpAmt << " gallons were requested " << endl;
  cout << pumped << " gallons were pumped" << endl;
  cout << amtInTank << " gallons remain in the tank" << endl;
  cout << "The total price is $" << setiosflags(ios::showpoint)
       << setprecision(2) << (pumped * price) << endl;
}