C + + constructor destructor invocation order

1#include <iostream>2 using namespacestd;3 classA4 {5      Public:6 A ()7     {8cout<<"A Construction"<<Endl;9     } Ten  Virtual~A ()//define virtual destructor causes the original destructor order to change One     { Acout<<"A destructor"<<Endl; -     } -          the }; - classD | PublicA - { -      Public: + B () -     { +cout<<"B Construction"<<Endl; A     } at~B () -     { -cout<<"B Destruction"<<Endl; -     } -      - }; in classE | PublicB - { to      Public : +~C () -     { thecout<<"C Destruction"<<Endl; *     } $     Panax Notoginseng C () -     { thecout<<"C Construction"<<Endl; +     } A };

 the int Main (intChar *argv[])    @ +-     B *b=  New  C;            The object pointer b created by the constructor of C, this step will explain the extent of the destruction of B to the deepest of the C-     delete  b;  $     return 0 ;  *}

Output Result:

Description: The above example for the destruction of a or to a destructor B one or two of the virtual function, will be the destructor sequence from the deepest sub-class, the deepest from the creation of the object when determined, if

1#include <iostream>2 using namespacestd;3 classA4 {5      Public:6 A ()7     {8cout<<"A Construction"<<Endl;9     } Ten   Virtual~A () One     { Acout<<"A destructor"<<Endl; -     } -          the }; - classD | PublicA - { -      Public: + B () -     { +cout<<"B Construction"<<Endl; A     } at~B () -     { -cout<<"B Destruction"<<Endl; -     } -      - }; in classC: PublicB - { to      Public : +~C () -     { thecout<<"C Destruction"<<Endl; *     } $     Panax Notoginseng C () -     { thecout<<"C Construction"<<Endl; +     } A }; the classB | PublicC + { -      Public : $~D () $     { -cout<<"D Destruction"<<Endl; -     } the      - D ()Wuyi     { thecout<<"D Construction"<<Endl; -     } Wu }; - intMainintargcChar*argv[]) About {     $B *b=NewC; -     Deleteb; -     return 0; -}

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Then the output is the same as above.

C + + constructor destructor invocation order