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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://borisivanov.com/index.php/2016/03/26/facade/