第十一讲面向对象编程基础.pptx

;第11讲 面向对象编程基础（2）;本讲内容;一、值类型与引用类型;值类型与引用类型;;;;值类型与引用类型; ;多个实例共享一个型，但各自存储自己的属性;二、继承与多态概况;请开“马自达车”！;从“有病”说起;#includestdio.h void PrintHelp(); void DriveVolvo(); void DriveBenz(); void DriveMazda(); main(int argc, char *argvs[]) { if(argc 2){ PrintHelp(); return; } if(strcmp(argvs[1],V)==0) DriveVolvo(); else if(strcmp(argvs[1], B)==0) DriveBenz(); else if(strcmp(argvs[1], M)==0) DriveMazda(); else PrintHelp();;解决办法;什么是“继承”;机动车;Musician;单继承与多继承;“继承”关系的代码实现;继承（续）;using System; public class Base { public int a = 10; } public class Derived : Base { } public class Client { public static void Main() { Derived d = new Derived(); Console.WriteLine(d.a); } };using System; public class Base { public static int a = 10; } public class Derived : Base { } public class Client { public static void Main() { Derived.a = 15; Console.WriteLine(Base.a); } };using System; public class Base { public void SayHello() { Console.WriteLine(Hello!); } } public class Derived : Base { } public class Client { public static void Main() { Derived d = new Derived(); d.SayHello(); } };using System; public class Base { public static void SayHello() { Console.WriteLine(Hello!); } } public class Derived : Base { } public class Client { public static void Main() { Derived.SayHello(); } };using System; public class Base { private int a = 10; public void ShowA() { Console.WriteLine(a); } } public class Derived : Base { } public class Client { public static void Main() { Derived d = new Derived(); d.ShowA(); } };继承（续）;多态（PolyMorphism）;“多态”案例;“多态”案例（续）;多态特点;面向对象三要素;面向对象学习顺序;小结;小结（续）