python编程在线求助

import math

r=float(input('请输晌拦闷入圆的半径:'))

print('半衡肢径为%f的圆的面积为宴弯%10.2f'%(r,math.pi*r*r))

import java.util.Scanner

class NotRectangleException extends Exception

{

public NotRectangleException(String msg)

{

super(msg)

}

}

class MyRectangle

{

private float x

private float y

private float z

public MyRectangle()

{

}

public MyRectangle(float a, float b, float c)

{

x = a

y = b

z = c

}

public void getArea()

{

try{

isRect()

}catch(NotRectangleException ne){

System.out.println("自定义异常类：" + ne.getMessage())

return

}

float p = (x + y + z)/2.0f

System.out.println("简伏三角形的面积： " + Math.sqrt(p*(p-x)*(p-y)*(p-z)) + "(单位)")

}

public void showInfo()

{

try{

isRect()

System.out.println("三角形的三边分别为：春咐薯x = " + x + " y = " + y + " z = " + z)

}catch(NotRectangleException ne){

System.out.println("自定义异常类：" + ne.getMessage())

}

}

public boolean isRect() throws NotRectangleException

{

if(x+y>z &&x+z>y &&y+z>x)

{

return true

}

else {

throw new NotRectangleException("x = " + x + ",y = " + y + "扒者,z = " + z + "不能构成三角形！\n")

}

}

}

public class MyRectangleTest

{

public static void main(String[] args)

{

Scanner scan = new Scanner(System.in)

System.out.print("请输入三角形的三条边：")

float a = scan.nextFloat()

float b = scan.nextFloat()

float c = scan.nextFloat()

MyRectangle mr = new MyRectangle(a, b, c)

System.out.println("\n若三条边能组成的三角形->则面积： ")

mr.getArea()

System.out.println("\n显示三条边的信息： ")

mr.showInfo()

}

}

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