#include <iostream.h>
#include <iomanip.h>
const float AMT_IN_TANK = 300;  // initial gallons in the tank
const float TODAYS_PRICE = 1.25;  // price-per-gallon

// class declaration

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

// implementation section

Pump::Pump(float start, float todaysPrice)
{
  amtInTank = start;
  price = todaysPrice;
}

void Pump::values()
{
cout << setiosflags(ios::fixed) << setiosflags(ios::showpoint)
     << setprecision(2) << endl;  
cout << "The gas tank has " << amtInTank << " gallons of gas." << endl;
cout << "The price per gallon of gas is $ << price << endl;

  return;
}

void Pump::request(float pumpAmt)
{
  float pumped;

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

  amtInTank -= pumped;
  cout << setiosflags(ios::fixed) << setiosflags(ios::showpoint)
       << setprecision(2) << endl;  
  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 $" << (pumped * price) << endl;

  return;
}

int main()
{
  Pump a(AMT_IN_TANK, TODAYS_PRICE);   // declare 1 object of type Pump

  a.values();
  cout << endl;
  a.request(30.0);
  cout << endl;
  a.request(280.0);

  return 0;
}