Hello, programmer! Today we are delving into the exciting world of Function Overloading in C++. This powerful feature allows you to introduce new functionality to your software while maintaining backward compatibility, much like expanding the capabilities of a tool without changing its core purpose.

Today, our journey comprises:

• Exploring the concept of Function Overloading in C++.
• Understanding how function overloading can preserve backward compatibility.
• Applying function overloading to solve practical problems.

Let's dive in!

Imagine yourself as a chef in a bustling restaurant kitchen, whipping up dishes tailored to individual customer preferences, yet ensuring consistency with timeless recipes. In the world of C++, function overloading plays a similar role. It allows you to define multiple functions with the same name but different parameter lists, creating a flexible interface that caters to diverse needs. This magic of function overloading is a key strategy for maintaining backward compatibility, ensuring your upgraded software doesn't alienate older code.

Consider the evolution of a calculate_discount function. Initially, it was implemented so as to provide a straightforward 10% discount. However, as requirements grew, users needed the flexibility to specify custom discount percentages. With function overloading, we seamlessly introduced this capability: