HW18: Recursive Function: exprec()

You are to write a function called exprec(), whose specs are:

        int
        exprec(int a, int b);
        /*
         * a and b must be non-negative; at least one
         *      of them must be greater than 0.
         * function returns a raised to the power of b
         *
         * example: exprec(3,4)==81
         */

Furthermore, you are to use recursion to accomplish this.
Your function may not contain or use any while, for or do loops.

How to start thinking about this:

        suppose you had to compute 3 to the 4 power
                what is 3 raised to the 4th power?
                     3*3*3*3

                what is the recursive step?

                when do you stop raising 3 to some power?

The function should be in a file called exprec.c

NOTES:  If either a or b is negative OR both are 0, return a value
of 0.

SUBMITTING YOUR HOMEWORK:

        Use the toteach command to submit exprec.c