Ace Your C++ Skills 2026 – Rock the ‘Thinking in C++’ Challenge!

The IntStack in the main() function is commonly used to store a sequence of integers, making the correct answer B Fibonacci numbers. This is because the Fibonacci sequence is a well-known mathematical sequence of numbers in which each number is the sum of the previous two. It is often used in programming to demonstrate recursive functions and for its mathematical properties. The other options are incorrect because prime numbers and randomly generated numbers may not follow a specific sequence and may not be suitable for filling the IntStack. Similarly, user-input numbers may not necessarily follow a specific sequence or pattern and may not be suitable for filling the IntStack.