add: cpp-programming-questions 13_virtual_abstract 05

Author: webwithaman

.vscode/settings.json

@@ -0,0 +1,5 @@
+{
+  "files.associations": {
+    "typeinfo": "cpp"
+  }
+}

13_virtual_function_and_abstract_class/05_bank.cpp

@@ -1,4 +1,4 @@
-// // Design a class hierarchy for a banking system with a base class Account and two derived classes SavingsAccount and CurrentAccount. Each class should have data members for account balance, account number, and an interest rate (for savings account). Implement pure virtual functions for deposit, withdraw, and display account details in Account class. Demonstrate the use of these classes by creating objects and performing transactions.
+// // Design a class hierarchy for a banking system with a base class Account and two derived classes SavingsAccount and CurrentAccount. Each class should have data members for account balance, account number, and an interest rate (for savings account). Implement pure virtual functions for set account number, deposit, withdraw, and display account details in Account class. Demonstrate the use of these classes by creating objects and performing transactions.
 
 // // Header files
 #include <iostream>
@@ -13,6 +13,7 @@ class Account
 {
 public:
     // // static member variable
+    static const int MAX_CHARS_IN_NAME = 31;
     static const int MAX_DIGITS_IN_ACCOUNT_NUM = 6;
 
 protected:
@@ -22,6 +23,7 @@ class Account
 
 public:
     // // pure virtual functions to be overridden by derived classes
+    virtual void setAccountNumber(const char *) = 0;
     virtual void deposit(double) = 0;
     virtual void withdraw(double) = 0;
     virtual void displayAccountDetails() const = 0;
@@ -35,8 +37,31 @@ class SavingAccount : public Account
     static float rateOfInterest;
 
 public:
+    SavingAccount()
+    {
+        accountBalance = 0;
+    }
+
+    // // override base class setAccountNumber function
+    void setAccountNumber(const char *accountNumber) override
+    {
+        int length = strlen(accountNumber);
+
+        this->accountNumber = new char[length > MAX_DIGITS_IN_ACCOUNT_NUM - 1 ? MAX_DIGITS_IN_ACCOUNT_NUM : length + 1];
+
+        if (length > MAX_DIGITS_IN_ACCOUNT_NUM - 1)
+        {
+            strncpy(this->accountNumber, accountNumber, MAX_DIGITS_IN_ACCOUNT_NUM - 1);
+            this->accountNumber[MAX_DIGITS_IN_ACCOUNT_NUM - 1] = 0; // // terminate with null character
+        }
+        else
+        {
+            strcpy(this->accountNumber, accountNumber);
+        }
+    }
+
     // // override base class deposit function
-    void deposit(double amount)
+    void deposit(double amount) override
     {
         // // invalid amount
         if (amount < 0)
@@ -47,11 +72,13 @@ class SavingAccount : public Account
 
         // // add amount in accountBalance
         accountBalance += amount;
-        cout << "\nMoney Deposited Successfully";
+        cout << endl
+             << amount << "Rs. "
+             << " Have Deposited Successfully...";
     }
 
     // // override base class withdraw function
-    void deposit(double amount)
+    void withdraw(double amount) override
     {
         // // invalid amount
         if (amount < 0)
@@ -67,14 +94,17 @@ class SavingAccount : public Account
 
         // // add amount in accountBalance
         accountBalance -= amount;
-        cout << "\nMoney Has Withdrawal Successfully";
+        cout << endl
+             << amount << "Rs."
+             << " Have Withdrawal Successfully...";
     }
 
     // // override base class displayAccountDetails function
-    void displayAccountDetails()
+    void displayAccountDetails() const override
     {
         cout << "\nAccount Number => " << accountNumber;
         cout << "\nAccount Balance => " << accountBalance;
+        cout << "\nRate of Interest => " << rateOfInterest;
     }
 
     // // static member function to set rate of interest
@@ -90,9 +120,107 @@ class SavingAccount : public Account
     }
 };
 
+// // define static member variable rateOfInterest
+float SavingAccount::rateOfInterest;
+
+// // define class CurrentAccount by inheriting an abstract class Account
+class CurrentAccount : public Account
+{
+public:
+    // // constructors
+    CurrentAccount()
+    {
+        accountBalance = 0;
+    }
+
+    // // override base class setAccountNumber function
+    void setAccountNumber(const char *accountNumber) override
+    {
+        int length = strlen(accountNumber);
+
+        this->accountNumber = new char[length > MAX_DIGITS_IN_ACCOUNT_NUM - 1 ? MAX_DIGITS_IN_ACCOUNT_NUM : length + 1];
+
+        if (length > MAX_DIGITS_IN_ACCOUNT_NUM - 1)
+        {
+            strncpy(this->accountNumber, accountNumber, MAX_DIGITS_IN_ACCOUNT_NUM - 1);
+            this->accountNumber[MAX_DIGITS_IN_ACCOUNT_NUM - 1] = 0; // // terminate with null character
+        }
+        else
+        {
+            strcpy(this->accountNumber, accountNumber);
+        }
+    }
+
+    // // override base class deposit function
+    void deposit(double amount) override
+    {
+        // // invalid amount
+        if (amount < 0)
+        {
+            cout << "\n!!! Given Amount is Invalid...";
+            return;
+        }
+
+        // // add amount in accountBalance
+        accountBalance += amount;
+        cout << endl
+             << amount << "Rs. "
+             << " Have Deposited Successfully...";
+    }
+
+    // // override base class withdraw function
+    void withdraw(double amount) override
+    {
+        // // invalid amount
+        if (amount < 0)
+        {
+            cout << "\n!!! Given Amount is Invalid...";
+            return;
+        }
+        else if (accountBalance < amount) // // Insufficient Balance
+        {
+            cout << "\n!!! Insufficient Balance...";
+            return;
+        }
+
+        // // add amount in accountBalance
+        accountBalance -= amount;
+        cout << endl
+             << amount << "Rs."
+             << " Have Withdrawal Successfully...";
+    }
+
+    // // override base class displayAccountDetails function
+    void displayAccountDetails() const override
+    {
+        cout << "\nAccount Number => " << accountNumber;
+        cout << "\nAccount Balance => " << accountBalance;
+    }
+};
+
 // // Main Function Start
 int main()
 {
+    SavingAccount sa1;
+    sa1.setAccountNumber("27038");
+    sa1.setRateOfInterest(2.5);
+    cout << "\n\n>>>>>>> Saving Account Details Before Any Transaction <<<<<<<<";
+    sa1.displayAccountDetails();
+    cout << "\n\n>>>>>>> Transactions <<<<<<<<";
+    sa1.deposit(570);
+    sa1.withdraw(5);
+    cout << "\n\n>>>>>>> Saving Account Details After Transactions <<<<<<<<";
+    sa1.displayAccountDetails();
+
+    CurrentAccount ca1;
+    ca1.setAccountNumber("272091");
+    cout << "\n\n>>>>>>> Current Account Details Before Any Transaction <<<<<<<<";
+    ca1.displayAccountDetails();
+    cout << "\n\n>>>>>>> Transactions <<<<<<<<";
+    ca1.deposit(100);
+    ca1.withdraw(85);
+    cout << "\n\n>>>>>>> Current Account Details After Transactions <<<<<<<<";
+    ca1.displayAccountDetails();
 
     cout << endl; // Add new line
     getch();