1. OOP in C Before GObject [email_address] elpam@Taiwan, Taipei, 2008

5. GLIB-1.2.10

6. GMAKE-3.81

8. Constructor in C

10. member value initialize

11. initial member function (x)

12. do something class Dog: public Animal{ private : string name; public: Dog(); }; Dog::Dog( const string n) : Animal() /*(1)*/ , name(n) /*(2)*/ { /* (4) */ cout << '' 汪汪 '' << endl; }

14. abc /* 3-1.cpp */ class A{ public: A(){printf( “a” );}; }; class B: public A{ public: B(){printf( “b” );}; }; class C: public B{ public: C(){printf( “c” );}; }; C* c = new C;

17. abC

18. ABC /* 3-2.cpp */ class A{ public: A(){printf( “a” );}; A( int ){printf( “A” );}; }; class B: public A{ public: B(){printf( “b” );}; B( int ){printf( “B” );}; }; class C: public B{ public: C(){printf( “c” );}; C( int ){printf( “C” );}; }; C* c = new C(1);

20. Write Constructor Accurately constructor( Value ) : parent's constructor , member value initialize { /* do something */ } /* 3-3.hpp */ class A{ public: A(){ va = 0 ; }; A( int v){ va = v; }; private: int va; }; class B: public A{ public: B(); B( int ); private: int vb; }; /* ex3.cpp */ B::B() : A() , vb( 0 ) { printf( '' hello this is B() '' ); B::B( int v) : A( v ) /* !! */ , vb( v ) { printf( '' hello this is B(int) '' );

22. member value initialize

23. do something constructor( Value ) : parent's constructor , member value initialize { /* do something */ }

24. From C++ to C

27. member value initialize

28. do something struct A{ int a; }; struct B{ struct A parent; int a; }; struct A* A_new() { struct A* ret = malloc( sizeof (A) ); ret -> a = 0; return ret; } struct B* B_new() { struct B* ret = malloc( sizeof (B) ); ret -> parent -> a = 0; /* ???? */ ret -> b = 0; return ret; }

31. Initialize parent's member function!?

34. Gobject並不是使用C來完成C++/OOP裡 全部 的功能

35. 我們將在下一個投影片之中導入GObject for OO