總結(jié)：單繼承模式下JAVA和C++相同，處理代碼方面和事后處理方面有點(diǎn)小差異外沒有什么本質(zhì)的不同

JAVA一共3個文件

1.Base.class?

2.Child.class(繼承Base)

3._Main.class

C++一共3個文件

1.Base.h

2.Child.h(繼承Base)

3._Main.cpp

下面展示JAVA代碼

Base.class

package ABoutClass;public class Base {public int a=1;public void BasePrint(){System.out.println("Base-print Called and a is "+a);} }

Child.class

package ABoutClass;public class Child extends Base {public int b=2;public void ChildPrint(){System.out.println("a of extendsion Base is "+a);System.out.println("Child-print Called and b is "+b);} }

_Main.class

package ABoutClass;public class _Main {public static void main(String[] args){Base base=new Child();base.BasePrint();Child child=new Child();child.ChildPrint();child.BasePrint();} } 運(yùn)行結(jié)果:

下面是C++代碼

Base.h

#pragma once #include <stdio.h> class Base { public:int a;Base() :a(1){}void BasePrint(){printf_s("Base-print Called and a is %d", a);} };

Child.h

#pragma once #include <stdio.h> #include "Base.h"class Child :public Base { public:int b;Child():b(2){}void ChildPrint(){printf_s("a of extendsion Base is %d\n", a);printf_s("Child-print Called and a is %d", b);} };

_Main.cpp

#include "Base.h" #include "Child.h"void main() {Base *base = new Child();base->BasePrint();printf_s("\n");Child *child = new Child();child->ChildPrint();printf_s("\n");child->BasePrint();getchar();delete base;delete child; } 運(yùn)行結(jié)果:

下面對比下:

發(fā)現(xiàn)在單繼承中，JAVA和C++并沒有什么不同，但JAVA不支持多繼承(避免菱形問題)

但JAVA中接口(interface)來指明多個類實現(xiàn)的方法(方法和C++里面的函數(shù)等同)

總結(jié)

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