本帖最后由 许庭洲 于 2013-6-13 20:18 编辑
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
/////////////声明一个 接口 IDimensions 和一个类 Box,该类显式实现接口成员 getLength 和 getWidth。通过接口实例 dimensions 访问这些成员。////////////
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
interface IDimensions { float getLength(); float getWidth(); } class Box : IDimensions { float lengthInches; float widthInches; Box(float length, float width) { lengthInches = length; widthInches = width; } //Explicit interface member implementation: float IDimensions.getLength() { return lengthInches; } //Explicit interface member implementation: float IDimensions.getWidth() { return widthInches; } static void Main() { //Declare a class instance box1: Box box1 = new Box(30.0f, 20.0f); //Declare an interface instance dimensions: IDimensions dimensions = (IDimensions)box1; //The following commented lines would produce compilation //errors because they try to access an explicitly implemented //interface member from a class instance: //System.Console.WriteLine("Length: {0}", box1.getlength()); //System.Console.WriteLine("Width: {0}", box1.getwidth()); //Print out the dimensions of the box by calling the methods //from an instance of the interface: System.Console.WriteLine("Length: {0}", dimensions.getLength()); System.Console.WriteLine("Width: {0}", dimensions.getWidth()); } } /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
Length: 30 Width: 20 ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
|