Arbitrary

1.When do we use the following functions?
(a) free ( )

(b) rewind ( )

2. Describe an algorithm that will append the contents of one file to the end of another file.
3. Define a macro PRINT_VALUE that can be used to print two values of arbitrary type.
4. Write a nested macro that gives the minimum of three values.
5. Define a macro with one parameter to compute the volume of a sphere. Write a program

using this macro to compute the volume for spheres of radius 5, 10 and 15 metres.