From the course: Object-Oriented Programming with C++

Unlock this course with a free trial

Join today to access over 24,500 courses taught by industry experts.

Solution: Bank account with audit system

Solution: Bank account with audit system - C++ Tutorial

From the course: Object-Oriented Programming with C++

Start my 1-month free trial Buy for my team

Solution: Bank account with audit system

“

(bright music) - [Instructor] It wasn't that hard was it? Just in case, here's my solution. First, let's inspect the bank account classes display balance method. This is a const method, yet we're trying to increment the value of transaction count. Remember the const keyword promises this method won't change the object state. The member function doesn't modify the member variables except for one, it needs to track access count, which leads us to the first issue. Now, updating the transaction count does not affect the account's essential state. It's just bookkeeping. This is exactly what the mutable keyword is for. Let's switch to the classes declaration and mark the transaction count member variable as mutable. Now it can be modified in any const method. First problem solved. Next, we have the auditor class that verifies multiple aspects of the account. It needs to check the account number format, the current balance and the transaction count. The bank account class could provide the…

Contents