题型:填空题 标签:代码
题目:
4. 有如下代码:
class Test{
class Dog{
private String name;
private int age;
private int step;
Dog(String s,int a){
name=s;
age=a;
step=0;
}
public void run(Dog fast){ fast.step++;}
}
public static void main (String args[]){
Test a=new Test();
Dog d=a.new Dog("Tom",3);
d.step=25;
d.run(d);
System.out.println(d.step);
}
}
程序的运行结果为______。