truthawp wrote:
比如有这样两个例子:
1.class A{...}
class B extends A{...}
class C extends A{...}
2.class A{...}
class B extends A{...}
class C extends B{...}
1是表示JAVA的多态性;2是多重继承,是JAVA里所不允许的
是这样的么?

class A{...}
class B{...}
// Sub extends both A and B is not allowed
// Java does not support multi-inheritance!!!!
// However, ........ you fill this out!
class Sub extends A, B{...}

class A{...}
class B{...}
class Sub : public A, public B{...}

gongshi wrote:
Wrong! Read a book, please!
Thanks!

1.
Apple is a Fruit.
Banana is a Fruit.
2.
Apple is a Fruit.
GuoGuangApple is an Apple

Why not allowed, you never eat any apple with a brand name?

Why don't you just compile the code to see what is allowed???

The following code is not allowed!!!!

class A{...}
class B{...}
// Sub extends both A and B is not allowed
// Java does not support multi-inheritance!!!!
// However, ........ you fill this out!
class Sub extends A, B{...}

Multi-inheritance is perfect legal in C++

class A{...}
class B{...}
class Sub : public A, public B{...}