java遞迴演算法，程式碼如下：

public class Test3 {



public  double zhishu(double x,double y){
   if(y>0){
      return x*zhishu(x,y-1);
   }else if(y<0){
   return (x*zhishu(x,-y-1));
   }else{
   return 1;
   }
}

public double fuzhishu(double x,double y){
 
double i=zhishu(x,y);

return 1/i;
}
public double action(double x,double y){

if(y>0){
return zhishu(x,y);
}else if(y<0){
return fuzhishu(x,y);
}else{
return 1;
}
}



public static void main(String[] args) {
// TODO Auto-generated method stub


Test3 t3=new Test3();
System.out.println(t3.action(-3,2));


}


}