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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. class Device
  5. {
  6. protected:
  7.     string name;
  8.  
  9. public:
  10.     virtual void showStatus() = 0; // Pure Virtual Function
  11. };
  12.  
  13. class Laptop : public Device
  14. {
  15. private:
  16.     string brand;
  17.  
  18. public:
  19.     Laptop(string b)
  20.     {
  21.         brand = b;
  22.     }
  23.  
  24.     void showStatus()
  25.     {
  26.         cout << "Laptop " << brand << " is ON" << endl;
  27.     }
  28. };
  29.  
  30. class Mobile : public Device
  31. {
  32. private:
  33.     string model;
  34.  
  35. public:
  36.     Mobile(string m)
  37.     {
  38.         model = m;
  39.     }
  40.  
  41.     void showStatus()
  42.     {
  43.         cout << "Mobile " << model << "is Running" << endl;
  44.     }
  45. };
  46.  
  47. class Tablet : public Device
  48. {
  49. private:
  50.     string osType;
  51.  
  52. public:
  53.     Tablet(string os)
  54.     {
  55.         osType = os;
  56.     }
  57.  
  58.     void showStatus()
  59.     {
  60.         cout << "Tablet " << osType << "is Active" << endl;
  61.     }
  62. };
  63.  
  64. int main()
  65. {
  66.     Device *d;
  67.  
  68.     Laptop l("Dell");
  69.     Mobile m("Samsung");
  70.     Tablet t("Android");
  71.  
  72.     d = &l;
  73.     d->showStatus();
  74.  
  75.     d = &m;
  76.     d->showStatus();
  77.  
  78.     d = &t;
  79.     d->showStatus();
  80.  
  81.     return 0;
  82. }
Success #stdin #stdout 0s 5320KB
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stdin
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Standard input is empty
stdout
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Laptop Dell is ON
Mobile Samsungis Running
Tablet Androidis Active
https://ideone.com/rAjowl
language:
C++14 (gcc 8.3)
created:
5 hours ago
visibility:
public

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