每日代码系列（9）

class Cylinder {
  private double radius;
  private int height;
  private double pi=3.14;
  private String color;
  public double setCylinder(double r,int h) {
    radius=r;
    height=h;
    return r+h;
  }
  public void setCylinder(String str) {
    color=str;
  }
  public void show() {
    System.out.println("颜色为:"+color);
  }
  double area() {
    return pi*radius*radius;
  }
  double volume() {
    return area()*height;
  }
}
public class C1_1 {
  public static void main(String[] args) {
    double r_h;
    Cylinder volu=new Cylinder();
    r_h=volu.setCylinder(2.5,5);
    volu.setCylinder("红色");
    System.out.println("半径和高之和="+r_h);
    System.out.println("体积="+volu.volume());
    volu.show();
  }
}