求长方形和圆形面积

求长方形和圆形面积

import java。util。*; public class CalculateArea { static final double PI = 3。 1415926; public static void main(String[] args) { double radius = 0, length = 0,width = 0; Scanner in = new Scanner ( ); intln("please input the radius of the circle"); radius = xtDouble(); intln("The area of the circ...全部

  import java。util。*; public class CalculateArea { static final double PI = 3。
  1415926; public static void main(String[] args) { double radius = 0, length = 0,width = 0; Scanner in = new Scanner ( ); intln("please input the radius of the circle"); radius = xtDouble(); intln("The area of the circle is " + PI * radius * radius); intln("please input the length of the rectangle"); length = xtDouble(); intln("please input the width of the rectangle"); width = xtDouble(); intln("The area of the rectangle is " + length * width); } }。收起