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  1. //Program tested on Microsoft Visual Studio 2008 - Zahid Ghadialy
  2. //Façade is part of Structural Patterns
  3. //Structural Patterns deal with decoupling the interface and implementation of classes and objects
  4. //A Facade is single class that represents an entire subsystem 
  5.  
  6. //The example we consider here is a case of a customer applying for mortgage
  7. //The bank has to go through various checks to see if Mortgage can be approved for the customer
  8. //The facade class goes through all these checks and returns if the morgage is approved
  9.  
  10. #include<iostream>
  11. #include<string>
  12.  
  13. using namespace std;
  14.  
  15. // Customer class
  16. class Customer
  17. {
  18. public:
  19.   Customer (const string& name) : name_(name){}
  20.   const string& Name(void)
  21.   {
  22.     return name_;
  23.   }
  24. private:
  25.   Customer(); //not allowed
  26.   string name_;
  27. };
  28.  
  29. // The 'Subsystem ClassA' class
  30. class Bank
  31. {
  32. public:
  33.   bool HasSufficientSavings(Customer c, int amount)
  34.   {
  35.     cout << "Check bank for " <<c.Name()<<endl;
  36.     return true;
  37.   }
  38. };
  39.  
  40. // The 'Subsystem ClassB' class
  41. class Credit
  42. {
  43. public:
  44.   bool HasGoodCredit(Customer c, int amount)
  45.   {
  46.     cout << "Check credit for " <<c.Name()<<endl;
  47.     return true;
  48.   }
  49. };
  50.  
  51. // The 'Subsystem ClassC' class
  52. class Loan
  53. {
  54. public:
  55.   bool HasGoodCredit(Customer c, int amount)
  56.   {
  57.     cout << "Check loans for " <<c.Name()<<endl;
  58.     return true;
  59.   }
  60. };
  61.  
  62. // The 'Facade' class
  63. class Mortgage
  64. {
  65. public:
  66.   bool IsEligible(Customer cust, int amount)
  67.   {
  68.     cout << cust.Name() << " applies for a loan for $" << amount <<endl;
  69.     bool eligible = true;
  70.  
  71.     eligible = bank_.HasSufficientSavings(cust, amount);
  72.  
  73.     if(eligible)
  74.       eligible = loan_.HasGoodCredit(cust, amount);
  75.  
  76.     if(eligible)
  77.       eligible = credit_.HasGoodCredit(cust, amount);
  78.  
  79.     return eligible;
  80.   }
  81.  
  82. private:
  83.   Bank bank_;
  84.   Loan loan_;
  85.   Credit credit_;
  86. };
  87.  
  88. //The Main method
  89. int main()
  90. {
  91.   Mortgage mortgage;
  92.   Customer customer("Brad Pitt");
  93.  
  94.   bool eligible = mortgage.IsEligible(customer, 1500000);
  95.  
  96.   cout << "\n" << customer.Name() << " has been " << (eligible ? "Approved" : "Rejected") << endl;
  97.  
  98.   return 0;
  99. }
  100.  
  101. // See more at: http://b...content-available-to-author-only...v.com/index.php/2016/03/26/facade/
Success #stdin #stdout 0s 3416KB
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Standard input is empty
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Brad Pitt applies for a loan for $1500000
Check bank for Brad Pitt
Check loans for Brad Pitt
Check credit for Brad Pitt

Brad Pitt has been Approved
https://ideone.com/tK4Nl0
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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