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

Default arguments in functions emphasize the ability to call a function in multiple ways, providing flexibility and convenience for the user. Option A, data type checking, is not necessarily related to default arguments as those can be determined by the function's parameters. Option B, function overloading, can also be achieved without the use of default arguments. Option D, reducing the number of functions, is not necessarily the main goal of default arguments and may not always be achieved by using them. Therefore, the correct answer is C.