Write a C program that calculates the power of a number, like 2^3 = 8. Here are the requirements:

1) get two numbers, a base and a power as user input.

2) of either number is less than 0 l, print error

3) otherwise, print result of base^power

4) In main() promipt the user for the input, and

5) put calculations in a separate function, let's say power()

6) make power() a recursive function (doing one multiplication operation each time)

7) document your code (all functions) with preconditions and postconditions