最近正在学类的继承问题..可是个难题啊

用继承的方法求面积都不会!请大家帮忙,谢谢!!




public class AA
{
int a=1,b,c;
void fuzhi(int b,int c)
{
this.b=b;
this.c=c;
}

public void print()
{
System.out.println("圆形的面积是：");
System.out.println("长方形面积是：");
}
}

class abcd extends AA
{
int a=2;

public static void main(String args[])
{
abcd m=new abcd();
m.fuzhi(2,3);
m.print();
}
}



这个是我根据书上 初步拟订的方案 还没有逻辑!

[此贴子已经被作者于2007-9-28 10:34:48编辑过]

我刚才找到了一个程序,有了大概的了解了!我也给大家看一下!

import javax.swing.JOptionPane;
class Rectangle extends Shape
{

public double mianji(double c,double k)
{
return c * k;
}
}
class Square extends Shape
{

public double mianji(double c,double k)
{
return c * k;
}
}

class Circle extends Shape
{

public double mianji(double y,double P)
{
return P * y * P * y;
}
}
abstract class Shape
{

public abstract double mianji(double x,double y);

}

public class jj
{
public static void main(String[] dafdasdf)
{
final double P = 3.14;
System.out.println("输入长");
double c = Integer.parseInt(JOptionPane.showInputDialog(null, "Enter Number"));
System.out.println("输入宽");
double k = Integer.parseInt(JOptionPane.showInputDialog(null, "Enter Number"));
System.out.println("输入输入半径");
double y = Integer.parseInt(JOptionPane.showInputDialog(null, "Enter Number"));

Rectangle a = new Rectangle();

double cf1 = a.mianji(c,k);

System.out.println("长方形的面积为:"+cf1);

Square b = new Square();

double zf1 = b.mianji(c,k);

System.out.println("正方形的面积为:"+zf1);

Circle d = new Circle();

double yy1 = d.mianji(y,P);

System.out.println("圆形的面积为:"+yy1);

}
}

[此贴子已经被作者于2007-9-28 11:01:16编辑过]