第七周作业

1 定义三个方法：getArea()求面积、getPer()求周长，showAll()分别在控制台输出长、宽、面积、周长。
package five;

public class text1 {
     int lenght;
        int width;
        public void area()
        {
            System.out.println(lenght*width);
        }
        public void zc(){
            System.out.println(2*(lenght+width));
        }
        public void showall(){
            System.out.println("宽"+width );
            System.out.println("长"+lenght);
            System.out.println("面积");
            area();
            System.out.println("周长");
            zc();
        }
    }

}
2 有2个属性：长length、宽width
package work;
import java.util.Scanner;
public class test {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Rectangle R = new Rectangle();
        Scanner input = new Scanner(System.in);
        System.out.println("请输入长：");
        R.length = input.nextInt();
        System.out.println("请输入宽:");
        R.width = input.nextInt();
        R.showAll();
    }
}