class People{

 double getArea(double x,int y){

  return x*y;

 }

 int getArea(int x,double y){

  return (int)(x*y);

 }

 double getArea(float x,float y,float z){

  return(x*x+y*y+z*z)*2.0;

 }

}

public class Example4_10{

   public static void main(String args[]){

    People zhang=new People();

    System.out.println("面积:"+zhang.getArea(10,3.88));

    System.out.println("面积:"+zhang.getArea(10,0.8));

   }

  }

public class Tom{

 int leg;

 Tom(int n){

  this.cry();

  leg=n;

  this.cry();

 }

 void cry(){

  System.out.println("我是Tom,我现在有"+leg+"条腿");

 }

 public static void main(String args[]){

  Tom cat=new Tom(4);

 }