356 Object-Oriented Programming: Inheritance Chapter (Web site optimization) 9 17 //
356 Object-Oriented Programming: Inheritance Chapter 9 17 // constructor 18 public Circle2( int xValue, int yValue, double radiusValue ) 19 { 20 // implicit call to Point constructor occurs here 21 x = xValue; 22 y = yValue; 23 Radius = radiusValue; 24 } 25 26 // property Radius 27 public double Radius 28 { 29 get 30 { 31 return radius; 32 } 33 34 set 35 { 36 if ( value >= 0 ) 37 radius = value; 38 } 39 40 } // end property Radius 41 42 // calculate Circle diameter 43 public double Diameter() 44 { 45 return radius * 2; 46 } 47 48 // calculate Circle circumference 49 public double Circumference() 50 { 51 return Math.PI * Diameter(); 52 } 53 54 // calculate Circle area 55 public virtual double area() 56 { 57 return Math.PI * Math.Pow( radius, 2 ); 58 } 59 60 // return string representation Circle 61 public override string ToString() 62 { 63 return “Center = [” + x + “, ” + y + “]” + 64 “; Radius = ” + radius; 65 } 66 67 } // end class Circle2 Fig. 9.8 Fig. 9.8Fig. 9.FiFi8g. 9.8g. 9.8Circle2class that inherits from class Point. (Part 2 of 3.)
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