Well, since it's for school I'll only point out a couple of issues...
- your for loop will never test the number 987 even though it should.
- add the following line rightr after you compute $numtotal:
print("$numtotal = $num1 + $num2 + $num3 + $num4 + $num5 + $num6\n");
and you'll see that you'll get output like:
28.6 = 2.6.5 + 2.5.6 + 6.2.5 + 6.5.2 + 5.2.6 + 5.6.2
which should help you understand why it's not doing what you think it's
doing.
good luck.
On Wed, 2 Oct 2002 [EMAIL PROTECTED] wrote:
> For a coursework assignment I have to investigate this thing where you do
> the following for example:
>
> 264 - Choose 3 digits that are not the same
> 12 - Find the sum of them.
>
> 264
> 246
> 624
> 642
> 426
> 462 - List all the possible combinations of those digits
> _____
> 2664 - Add the combinations
>
> 2664 / 12 = 222 - Divide the answer by the sum of the three digits
> and you allways get 222!
> To speed up the process of finding any exceptions if any, I thought id use
> php to do this, however i get a problem, the script runs without any coding
> errors, but it doesnt do what i want it to do - instead of returning any
> three digit combo that doesnt return 222, it just prints EVERY combo whice
> passes my conditional statement to weed out numbers that have digits where 2
> or more are the same.
>
> Here is my code:
>
> <?php
>
> for ($i = 012; $i < 987; $i ++) {
>
> $comma = chunk_split($i, 1, ",");
> $split = explode(",", $comma);
>
> if ($split[0] == $split[1] || $split[0] == $split[2] || $split[1] ==
> $split[2]) {
> } else{
>
> $digitstotal = $split[0] + $split[1] + $split[2];
>
> $num1 = "$split[0].$split[1].$split[2]";
> $num2 = "$split[0].$split[2].$split[1]";
> $num3 = "$split[1].$split[0].$split[2]";
> $num4 = "$split[1].$split[2].$split[0]";
> $num5 = "$split[2].$split[0].$split[1]";
> $num6 = "$split[2].$split[1].$split[0]";
>
> $numtotal = $num1 + $num2 + $num3 + $num4 + $num5 + $num6;
>
> $answer = $numtotal / $digitstotal;
>
> if ($answer != 222) {
> echo("$i does not return 222!<br>");
> }
> }
> }
> ?>
>
> What is wrong with it? Any help at all is greatly apreciated.
>
>
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