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2-digit mirror problem  

post #1 of 18
2/6/12 at 9:14am
Thread Starter 
Can you guys help me with this program.
Quote:
2-Digit Mirror
Given:
What is the smallest number, which, when multiplied by 2, and 2 added to the project, has its digits
reversed?
That is:
if A is a digit between 0 and 9, and if B is a digit between 0 and 9,
2*(AB)+2=BA
Find:
Use a for loop that goes from a range of 10 to 50.
Print out the value of the loop, and the value of the loop times 2 plus 2 on the same line.
Print out the value of the difference BA-AB on this same line.
Add an if statement to identify the correct pairing based on the value of the difference.
Write your own unique text message to identify the correct pairing of numbers.

I know the answer is 10:
Quote:
Given:
A =1
B=0
AB=10

2*10+2=22

A=2
B=2

AB = 22
BA = 22

I Just need help putting it in Python. Here's what I have so far:
Code:
range (10,50)
   for (a=1)

tongue.gif

It specifically wants a loop, well I haven't read the chapters that deal with loops yet so if you won't want to help me until then, I understand.

Edit: The answer was actually 25 52... I misunderstood what was meant by mirror.
Edited by BizzareRide - 2/8/12 at 2:38am
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post #2 of 18
2/6/12 at 3:19pm
http://lmgtfy.com/?q=For+Loop+Python


Allow me to clarify. Want to be a programmer? Learn how to teach yourself. It's the best thing you could do if you're serious about it. Asking for help is one thing, asking for code when you haven't bothered is another.
Edited by Satsukeshi - 2/6/12 at 3:24pm
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post #3 of 18
2/6/12 at 3:57pm
Thread Starter 
Quote:
Originally Posted by Satsukeshi View Post

http://lmgtfy.com/?q=For+Loop+Python
Allow me to clarify. Want to be a programmer? Learn how to teach yourself. It's the best thing you could do if you're serious about it. Asking for help is one thing, asking for code when you haven't bothered is another.


Who says I haven't bothered? The mere fact that I haven't read the chapters, but am hacking away at the code that I do know should show initiative.

The chapter on assignment variables I did without reading the chapters and I did pretty well on it, grade-wise.

To answer your question: No, I don't want to be a programmer. That's such a belittling and condescending title to give oneself. I would actually like to design and develop.

FYI that is a cool site you linked.
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post #4 of 18
2/6/12 at 6:04pm
Belittling and condescending eh? That's quite a... Interesting viewpoint, to say the least. Good luck with your inept hacking away at code.
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post #5 of 18
2/8/12 at 2:37am
Thread Starter 
Quote:
Originally Posted by Satsukeshi View Post

Belittling and condescending eh? That's quite a... Interesting viewpoint, to say the least. Good luck with your inept hacking away at code.

I solved it with my 'ineptitude.'
Code:
import math

aNumber = 25
for aNumber in range(10,51):  #aNumber prints 10 through 50 in first column
        for bNumber in range(10,51): #bNumber prints 10 through 50 on second collumn
                bNumber = aNumber*2+2  #An expression that * 2 and + 2 to aNumber 
        print "This is a pair:", aNumber, bNumber #Prints aNumber + bNumber on same row
        if aNumber == 25: #Identifies correct pairing
                if bNumber == 52:
                        print "This is the correct mirrored pair", aNumber,\
                              bNumber

Thanks for nothing.
Edited by BizzareRide - 2/8/12 at 3:21am
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post #6 of 18
2/8/12 at 9:16am
That wasn't so hard now, was it.
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post #7 of 18
2/8/12 at 10:57am
Thread Starter 
Quote:
Originally Posted by Satsukeshi View Post

That wasn't so hard now, was it.

You still could've help me!mad.gif

I slapped myself on the head when the code worked and it was so obvious.

It took hours, but it was rewarding to do smile.gif
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post #8 of 18
2/8/12 at 11:08am
That's the best part about coding, makes all the frustration worthwhile. smile.gif


fwtw I don't start Python till next week. rolleyes.gif
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post #9 of 18
2/8/12 at 11:12am
Thread Starter 
Quote:
Originally Posted by Satsukeshi View Post

That's the best part about coding, makes all the frustration worthwhile. smile.gif
fwtw I don't start Python till next week. rolleyes.gif

So you're a n00b programmer like me or do you have experience in another language?
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post #10 of 18
2/8/12 at 11:20am
Been doing Java and C/C++ for about 5 years now. Decided to go to uni for it, where I've learned web dev (HTML, PHP, Javascript, etc), and random languages like ML, Prologue, ASM, etc over the past year or so. For the most part, self taught. Focusing on game development for Android at the moment.

Didn't mean to go on a tirade, however. Beer and stupid compilation errors make for a nasty mix. My apologies. redface.gif
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