generated from mwc/problemset_numberwords
57 lines
1.8 KiB
Markdown
57 lines
1.8 KiB
Markdown
# Planning Number Words
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Before you start programming, do some planning here on how you will break down
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this problem. Here's a hint: if you start by writing functions for smaller numbers,
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you will find that these functions help you with the larger numbers. For each of
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the cases below, explain how you would turn a number into a string. Feel free to
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write in sentences or in pseudocode (pseudocode is a sort of "casual programming"
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where you're almost writing in code, being pretty specific without worrying about
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syntax. For each case below, assume the integer is zero or more--don't worry about
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negative integers.
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## Integers under 10
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(This one is done for you!)
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For an integer less than ten, you need to know the name of each digit, and look it
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up. You could use a big if/else statement like:
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```
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if number == 0:
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return "zero"
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elif number == 1:
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return "one"
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elif number == 1:
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return "two"
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```
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A cleaner way to do this would be to make a list of digit names, from zero to nine.
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Then you could just look up a digit's name:
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```
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digit_names = [
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"zero", "one", "two", "three", "four",
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"five", "six", "seven", "eight", "nine"
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]
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return digit_names[number]
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```
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## Integers under 20
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If integer < 10, then return digit_names[number]
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Else return digit_names between 10 and 19
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## Integers under 100
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If integer < 20, return "Integers under 20"
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Else return integer between 20 and 99 with proper "and"
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## Integers under 1000
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If integer < 100, return "Integers under 100"
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Else return integer between 100 and 999 with proper "and"
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## Integers under 1000000
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If integer < 1000, return "Integers under 1000"
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Else return integer between 1000 and 999999 with proper "and"
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## Negative integers down to -1 million
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Use the above integers but add a negative symbol to all integers and reverse less than to greater than
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