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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. class Kelvin;
  5.  
  6. class TemperatureUnit
  7. {
  8. public:
  9.     explicit TemperatureUnit(int value) :
  10.         m_value(value)
  11.     {
  12.     }
  13.  
  14.     virtual void print() = 0;
  15.  
  16.     int value() const
  17.     {
  18.         return m_value;
  19.     }
  20. private:
  21.     int m_value;
  22. };
  23.  
  24. class Celsius : public TemperatureUnit
  25. { 
  26.  
  27. public:
  28.     Celsius(int value) :
  29.         TemperatureUnit(value)
  30.     {
  31.  
  32.     }
  33.     void print() override
  34.     {
  35.         cout<<value()<<"[C]\n";
  36.     }
  37.  
  38.     Celsius operator +(const Kelvin& kelvin);
  39.  
  40. };
  41.  
  42. class Kelvin : public TemperatureUnit
  43. {
  44.  
  45. public:
  46.     Kelvin(int value) :
  47.         TemperatureUnit(value)
  48.     {
  49.  
  50.     }
  51.  
  52.     void print() override
  53.     {
  54.         cout<<value()<<"[K]\n";
  55.     }
  56.  
  57.     Kelvin operator +(const Celsius& celsius);
  58. };
  59.  
  60. //operator definitions
  61. Celsius Celsius::operator +(const Kelvin& kelvin)
  62. {
  63.     Celsius c(this->value() + kelvin.value() - 273);
  64.     return c;    
  65. }
  66.  
  67. Kelvin Kelvin::operator +(const Celsius& celsius)
  68. {
  69.     Kelvin k(this->value() + celsius.value() + 273);
  70.     return k;    
  71. }
  72.  
  73. int main() {
  74. 	Kelvin kelvin(293);
  75. 	Celsius celsius(20);
  76.  
  77. 	(celsius + kelvin).print();
  78. 	(kelvin + celsius).print();
  79.  
  80.  
  81. 	return 0;
  82. }
Success #stdin #stdout 0s 15224KB
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https://ideone.com/sBTJVd
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
public

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