computetest.java

JAVA编写的程序 JAVA编写的程序

//package Compute;

class Rectangle
{
  double length;
  double width;
  Rectangle(double length,double width)
  {
    this.length = length;
    this.width = width;
  }
  double area()
  {
    return length * width;
  }
}

class Circle
{
  double r;
  Circle(double r)
  {
    this.r = r;
  }
  double area()
  {
    return Math.PI * Math.pow(r,2);
  }
}

class Triangle
{
  double x;
  double y;
  Triangle(double x,double y)
  {
    this.x = x;
    this.y = y;
  }
  double area()
  {
    return (x * y)/ 2;
  }
}


 class ComputeTest
 {
   public static void main(String[] args)
   {
     Rectangle rect1 = new Rectangle(1.0,2.0);
     Rectangle rect2 = new Rectangle(2.0,3.0);
     Circle cir1 = new Circle(4.0);
     Circle cir2 = new Circle(5.0);
     Circle cir3 = new Circle(6.0);
     Triangle tri1 = new Triangle(3.0,4.0);
     Triangle tri2 = new Triangle(5.0,6.0);
     Triangle tri3 = new Triangle(1.0,3.0);
     Triangle tri4 = new Triangle(2.0,4.0);
     double TotalArea = rect1.area()+rect2.area()+cir1.area()+cir2.area()+cir3.area()+
                        tri1.area()+tri2.area()+tri3.area()+tri4.area();
     System.out.println("TotalArea="+TotalArea);
   }
 }