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  1. #include <cstdint>
  2. #include <iostream>
  3.  
  4. /** Base class with virtual interface for initialization.
  5.  *
  6.  * Provides a stable interface for derived classes to override the initialization method.
  7.  * All derived classes must implement the init method with appropriate parameter types.
  8.  */
  9. class BaseInitializer {
  10. public:
  11.     BaseInitializer() = default;
  12.     virtual ~BaseInitializer() = default;
  13.  
  14.     /** Initialize with 32-bit integer parameter.
  15.      *
  16.      * @param value The integer value for initialization.
  17.      */
  18.     virtual void init(int32_t value) noexcept {}
  19. };
  20.  
  21. /** Derived class implementing integer-based initialization.
  22.  *
  23.  * Provides a concrete implementation of the initialization interface for integer values.
  24.  */
  25. class IntInitializer final : public BaseInitializer {
  26. public:
  27.     IntInitializer() = default;
  28.  
  29.     /** Initialize with 32-bit integer parameter.
  30.      *
  31.      * @param value The integer value for initialization.
  32.      */
  33.     void init(int32_t value) noexcept override {
  34.         std::cout << "IntInitializer::init called with value: " << value << std::endl;
  35.     }
  36. };
  37.  
  38. /** Another derived class implementing integer-based initialization.
  39.  *
  40.  * Provides an alternative concrete implementation of the initialization interface.
  41.  */
  42. class AltInitializer final : public BaseInitializer {
  43. public:
  44.     AltInitializer() = default;
  45.  
  46.     /** Initialize with 32-bit integer parameter.
  47.      *
  48.      * @param value The integer value for initialization.
  49.      */
  50.     void init(int32_t value) noexcept override {
  51.         std::cout << "AltInitializer::init called with value: " << value << std::endl;
  52.     }
  53. };
  54.  
  55. /** Derived class supporting overloaded initialization methods.
  56.  *
  57.  * Provides initialization with both integer and string parameters, demonstrating
  58.  * method overloading in a class hierarchy.
  59.  */
  60. class MultiInitializer final : public BaseInitializer {
  61. public:
  62.     MultiInitializer() = default;
  63.  
  64.     /** Initialize with 32-bit integer parameter.
  65.      *
  66.      * @param value The integer value for initialization.
  67.      */
  68.     void init(int32_t value) noexcept override {
  69.         std::cout << "MultiInitializer::init(int32_t) called with value: " << value << std::endl;
  70.     }
  71.  
  72.     /** Initialize with string parameter.
  73.      *
  74.      * @param text The string value for initialization.
  75.      */
  76.     void init(const char * text) noexcept {
  77.         std::cout << "MultiInitializer::init(const char*) called with text: " << text << std::endl;
  78.     }
  79. };
  80.  
  81. int32_t main() noexcept {
  82.     std::cout << "=== Starting initialization demonstration ===" << std::endl;
  83.  
  84.     IntInitializer initializer1;
  85.     std::cout << "Created IntInitializer" << std::endl;
  86.     initializer1.init(10);
  87.  
  88.     AltInitializer initializer2;
  89.     std::cout << "Created AltInitializer" << std::endl;
  90.     initializer2.init(10);
  91.  
  92.     MultiInitializer initializer3;
  93.     std::cout << "Created MultiInitializer" << std::endl;
  94.     initializer3.init(10);
  95.     initializer3.init("a");
  96.  
  97.     std::cout << "=== Initialization demonstration completed ===" << std::endl;
  98.  
  99.     return 0;
  100. }
Success #stdin #stdout 0s 5312KB
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Standard input is empty
stdout
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=== Starting initialization demonstration ===
Created IntInitializer
IntInitializer::init called with value: 10
Created AltInitializer
AltInitializer::init called with value: 10
Created MultiInitializer
MultiInitializer::init(int32_t) called with value: 10
MultiInitializer::init(const char*) called with text: a
=== Initialization demonstration completed ===
https://ideone.com/Kgclel
language:
C++ (gcc 8.3)
created:
23 hours ago
visibility:
public

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