摘要：递归方法 :decimal Salary(Employee e) { decimal s = e.salary; if (e.EmployeeCollection !=null) { foreach (Employee x in e.EmployeeCollection) { s += Salary(x); } } return s; } 阅读全文

摘要：using System;class A{public A(){PrintFields();}public virtual void PrintFields(){}}class B:A{int x=1;int y;public B(){y=-1;}public override void PrintFields(){Console.WriteLine("x={0},y={1}",x,y);}当使用new B()创建B的实例时，产生什么输出？A a=new B（）；答案1,0B b =new B(); 答案1,0 阅读全文