题目内容

用new创建一个对象时，将在（）为对象分配内存。对象变量存储的是（）。

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在非密封类中为了防止某个实例成员在子类中被重写，可以将该成员声明为成员。

使用修饰符可以防止从所修饰的类派生出其他类。

阅读程序，写出程序运行结果：class Program{static void Main(string[] args){Shape[] s = {new Rectangle("矩形",2.0,3.0),new Circle("圆",3.5)};foreach(Shape shape in s){shape.Show();}Console.ReadKey();}}public abstract class Shape{protected string name;public Shape(string name){this.name = name;}public abstract void Show();public abstract double Area();}public class Rectangle : Shape{protected double weight;protected double height;public Rectangle(string name,double w,double h) : base(name){this.weight = w;this.height = h;}public override void Show(){Console.WriteLine("Rectangle:{0},area:{1:N2}",name,weight * height);}public override double Area(){return weight * height;}}public class Circle : Shape{protected double radius;public Circle(string name,double r) : base(name){this.radius = r;}public override void Show(){Console.WriteLine("Circle:{0},area:{1:N2}",name,Math.PI * radius * radius);}public override double Area(){return Math.PI * radius * radius;}}

阅读程序，写出程序运行结果。public delegate int DemoDelegate(int num);class Tool{public static void IntSquare(int[] intArray, DemoDelegate dd){for (int i = 0; i < intArray.Length; i++){intArray[i] = dd(intArray[i]);}}}class Program{static void Main(string[] args){DemoDelegate dd = Square;int[] intArray = {2,4,6 };Tool.IntSquare(intArray, dd);for (int i = 0; i < intArray.Length; i++){Console.WriteLine(intArray[i]);}Console.Read();}static int Square(int num){return num * num;}}