From: Danny Yoo Date: 08/09/06 11:01:14 To: Kermit Rose Cc: tutor@python.org Subject: Re: [Tutor] programming exercise in Python On Wed, 9 Aug 2006, Kermit Rose wrote: > I've written tenative code for the incr routine. > > Now to test and possibly debug it. Just as a note: it's usually a much better idea to write your test cases first, even before writing any code. It'll give you a better idea of what you want your function to do. (It'll also probably give the other here a better idea of what the function is supposed to do. I myself don't quite know either what it's supposed to do based solely on the description. *grin*) What are some small test cases you're thinking of for this function? s function? ******** Hello Danny. The test cases are For mpylist = [[2, 1], [3, 2], [7, 3], [5, 2], [31, 5], [127, 7]]
zlim = 7 Initial value of mult = [0,0,0,0,0,0] next few values of mult are: [2, 0, 0, 0, 0, 0] because mult[0] must skip over value of 1 and 2 * 1 < 7 [3, 0, 0, 0, 0, 0] because 3 * 1 < 7 [4, 0, 0, 0, 0, 0] because 4 * 1 < 7 [5, 0, 0, 0, 0, 0] because 5 * 1 < 7 [6, 0, 0, 0, 0, 0] because 6 * 1 < 7 [0, 1, 0, 0, 0, 0] because 1 * 2 < 7 [2, 1, 0, 0, 0, 0] because 2 * 1 + 1 * 2 < 7 [3, 1, 0, 0, 0, 0] because 3 * 1 + 1 * 2 < 7 [4, 1, 0, 0, 0, 0] because 4 * 1 + 1 * 2 < 7 [0, 2, 0, 0, 0, 0] because 0 * 1 + 2 * 2 < 7 [2, 2, 0, 0, 0, 0] because 2 * 1 + 2 * 2 < 7 and mult[0] value must skip 1 [0, 3, 0, 0, 0, 0] because 0 * 1 + 3 * 2 < 7 [0, 0, 1, 0, 0, 0] because 0 * 1 + 0 * 2 + 1 * 3 < 7 [2, 0, 1, 0, 0, 0] because 2 * 1 + 0 * 2 + 1 * 3 < 7 [3, 0, 1, 0, 0, 0] because 3 * 1 + 0 * 2 + 1 * 3 < 7 [0, 1, 1, 0, 0, 0] because 0 * 1 + 1 * 2 + 1 * 3 < 7 I had the program generate the test cases for me, and then inspected them to verify that they were what I desired. The subroutine passed this initial test. Thanks _______________________________________________ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
