Create your own function in C that accepts one input number and returns a double number. The themes for the functions should be one of the following:

1.)Squares the number and returns the result. For example, if 12.1 was entered then 146.41 would be returned.

You should provide both your C code and an example call to the C code function. Be sure to provide an overview of what your function is doing. Include header documentation in the code as well as internal code documentation.