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tyronefrancis01

Fri Jun 03, 2016 9:11 pm


Upside Down Number

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hello guys im trying to write a program that is rotated 180 degrees on the page (turned upside down). A multi-digit number may also look like itself when rotated on the page; for example 9966 and 10801 do, but 999 and 1234 do not.

Sample input: 108801
Output: 108801 is rotatable
Sample input: 69
Output: 1008 is not rotatable 
 Help me pls! thank you so much


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Zren

Sun Jun 05, 2016 11:34 pm


RE:Upside Down Number

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What have you tried so far? Try breaking the larger problem down into smaller goals like so.

1) First, on paper, write down each digit, then write what digit it looks like reversed, or if there isn't any digits it looks like.

2) Then write a func isReversedDigit(a:string, b:string) : bool
put isReversedDigit("6", "9") should output true.
put isReversedDigit("3", "9") should output false.

3) Use substrings to get the character at a specific index.

4) Use a single loop to compare the first and last digit, then the second and second last digit, then the third and third last digit... etc either until you've compared the entire string.