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  1. //==============================================================================
  2. // Include Files
  3. //=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
  4. #include <iostream>
  5. #include <string>
  6. //==============================================================================
  7. // Name Space
  8. //=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
  9. using namespace std;
  10. //==============================================================================
  11. // Class
  12. //=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
  13. class                   ParentClass {
  14.     //--------------------------------------------------------------------------
  15.     public:
  16.                         ParentClass() {                 // Constructor
  17.           //this->SetName();		// ERROR!!
  18.         }
  19.                        ~ParentClass() {                 // Destructor
  20.         }
  21.         virtual void    ShowName(void) {
  22.             cout<<"The name is "<<this->name<<endl;
  23.         }
  24.     //--------------------------------------------------------------------------
  25.     protected:
  26.         virtual void    SetName(void)=0;
  27.         string          name;
  28.     //--------------------------------------------------------------------------
  29. };
  30. //=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
  31. class                   ChildClassA:public ParentClass {
  32.     //--------------------------------------------------------------------------
  33.     public:
  34.                         ChildClassA() {                 // Constructor
  35.             cout<<"ChildClassA be created."<<endl;
  36.           //this->SetName();
  37.         }
  38.                        ~ChildClassA() {                 // Destructor
  39.             cout<<"ChildClassA be killed."<<endl;
  40.         }
  41.     //--------------------------------------------------------------------------
  42.     protected:
  43.         virtual void    SetName(void) {
  44.             this->name = "Tom";
  45.         }
  46.     //--------------------------------------------------------------------------
  47. };
  48. //=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
  49. class                   ChildClassB:public ParentClass {
  50.     //--------------------------------------------------------------------------
  51.     public:
  52.                         ChildClassB() {                 // Constructor
  53.             cout<<"ChildClassB be created."<<endl;
  54.           //this->SetName();
  55.         }
  56.                        ~ChildClassB() {                 // Destructor
  57.             cout<<"ChildClassB be killed."<<endl;
  58.         }
  59.     //--------------------------------------------------------------------------
  60.     protected:
  61.         virtual void    SetName(void) {
  62.             this->name = "Sam";
  63.         }
  64.     //--------------------------------------------------------------------------
  65. };
  66. //==============================================================================
  67. // Main
  68. //=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
  69. int                     main() {
  70.     //--------------------------------------------------------------------------
  71.     ChildClassA         *child_a;
  72.     child_a = new ChildClassA();
  73.     child_a->ShowName();
  74.     delete child_a;
  75.     //--------------------------------------------------------------------------
  76.     ChildClassB         *child_b;
  77.     child_b = new ChildClassB();
  78.     child_b->ShowName();
  79.     delete child_b;
  80.     //--------------------------------------------------------------------------
  81.     return (0);
  82. }
  83. //==============================================================================
  84.  
Success #stdin #stdout 0s 3460KB
comments (?)
stdin
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Standard input is empty
stdout
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ChildClassA be created.
The name is 
ChildClassA be killed.
ChildClassB be created.
The name is 
ChildClassB be killed.
https://ideone.com/hhnsxT
language:
C++ (gcc 8.3)
created:
9 years ago
visibility:
public

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