public class Example4_10{

 public static void main(String[] args){

  people zhang=new people();

   System.out.printf("面积："+zhang.getArea(10,8.88));

   System.out.printf("面积: "+zhang.getArea(2.90,10));

  }

 }

 class people{

  double getArea(int x,double y){

  return x*y;

  }

  int getArea(double x,int y){

   return (int)x*y;

   }

 }