JAVA第13次作业
1.
执行50次
for循环中是使i从1到99,if语句的判断条件是若i是奇数则执行sum+=i语句,1到99共有50个奇数,故执行50次
2.
public abstract class Animal {
private String name;
private int age;
public abstract void cf();
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public Animal(String name, int age) {
this.name = name;
this.age = age;
}
public Animal() {}
}
public interface Jumpping {
public abstract void tg();
}
public class Cat extends Animal implements Jumpping {
public Cat(String name, int age) {
super(name, age);
}
public Cat() {
}
@Override
public void cf() {
System.out.println("吃猫粮");
}
@Override
public void tg() {
System.out.println("猫蹦了一下");
}
}
public class Dog extends Animal implements Jumpping {
public Dog(String name, int age) {
super(name, age);
}
public Dog() {
}
@Override
public void cf() {
System.out.println("吃狗粮");
}
@Override
public void tg() {
System.out.println("狗蹦了一下");
}
}
public class AnimalDemo {
public static void main(String[] args) {
Cat c = new Cat("猫", 3);
Dog d = new Dog("狗", 5);
c.cf();
c.tg();
d.cf();
d.tg();
}
}