class Fraction
{
public:
  Fraction();			// initializes fraction to 0/1
  Fraction(int n, int d);	// init to n/d

  void Show() const;		// print fraction to screen
  void Input();			// keyboard input of a fraction

  void SetValue(int n, int d);	// set the fraction to n/d

  int GetNumerator() const;
  int GetDenominator() const;

  double Evaluate() const;	// evaluate as decimal

private:
  int numerator;		// no restrictions
  int denominator;		// RULE: denominator != 0 must hold

};