**Q:**I heard a rumor that Program #6 isn't due until Wednesday.**A:**Yes, it is still useful to go to lecture. Glinert spent 1/2 hour on Monday's lecture going over Program #6 and finally ended with an extension for everyone until Wednesday.Furthermore, if you hand it on Monday, you will get the bonus points.

**Q:**For program #6... how does this whole thing work? I don't understand Glinert's explanation. DOH!**A:**Consider zis puny example:

Let's say you are working on the following equation:2x^3 + 4x^2 - 20x + 24 = 0

And you choose V to equal 100.

Then A = -100 and B = 100

For the first time through, C = 0 (because C = (A+B)/2.0 )

But that is alright. P(C) will just equal 24

Since 24 is positive, you will have to check if P(A) or P(B) is positive. If P(A) is positive then A = C otherwise B = C.

Since, in this case, the value is positive, we will replace the B.

So now you run through the whole thing again with A = -100 and B = 0

Do this until you get really precise numbers for A and B. Like A=-4.6827435 and B = -4.6827438.

Then choose one, say A, and that will be the approximated root.Your output should show all of these iterations and run through all 6 equations Glinert gave you.

**Q:**How do you use redirection?**A:**Here me now and believe me later, redirecting a file will make your life much easier.First just make your program as usual, with the normal

`cin`statements. Then create a file, called**data**, that looks like so:2 4 -20 24 -6 1 3 -40 1 20 30 40 4 13 0 -13 100 13 -13 0 -3 1 -20 25 0

Where each of the numbers corresponds to**a, b, c, and d**. The final 0 in the**a**slot will tell the program to end.Now run your program with the UNIX command:

**cubicRoot < data**This way you can run your program quickly without having to type in all those numbers over and over again.

**Q:**Do we have to find all 3 roots for each problem?**A:**Only equations #4 and #5 (from the standard data) have 3 roots, all the others only have one root. But for #4 and #5 I will accept any one of the 3 roots as being the correct solution.

**Q:**I am running out of space on my account. I don't want my homepage anymore and it is taking up space. Are we going to be graded on it again or can I remove it? Mmmmm, disk space...**A:**Zee homepage may be terminated.