Does C support function overloading like C++?

 




If you consider the printf() function in C, that may lead you to think that C supports function overloading. Because, in C you can have printf("%d", aDecimal) and printf("%f", aFloat). This looks a lot like function overloading, because we are using the same function name, but the function is accepting different parameter types – which is one of the ways we can overload functions.

A Variable Argument List is not Function Overloading




Actually, this is not a case of function overloading – the printf function is just using a feature of C known as variable argument lists. This should not be confused with function overloading. So, to answer the question, Standard C does not support function overloading.

As an interesting side note, C++ doesn’t really have function overloading. What it does have is a means of faking it: the C++ compiler actually ‘mangles’ (or changes) function names according to the function’s parameters. So, functions that share the same name but have different numbers or types of parameters can be differentiated when invoked. Also, since the ‘mangling’ of function names is not standardized, it’s usually difficult to link object files compiled by different C++ compilers.

Hiring? Job Hunting? Post a JOB or your RESUME on our JOB BOARD >>

Subscribe to our newsletter for more free interview questions.