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CalculatorWhat We're Looking For
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CheezItMan
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Feb 9, 2018
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| # Method to determine whether input is numeric | ||
| def numeric(num) | ||
| if num =~ /[-+]?([0-9]*\.[0-9]+|[0-9]+)/ |
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nice regular expression! Good way to verify something's a number.
| num1 = gets.chomp | ||
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| # User gets message to enter number again if it is not numerical | ||
| until numeric(num1) |
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Good way to trap the user until they enter a valid number.
| end | ||
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| if operation == "divide" || operation == "/" | ||
| until num2 != 0.0 |
| until num2 != 0.0 | ||
| print "Error: Division by zero is undefined. Try another number: " | ||
| num2 = gets.chomp | ||
| until numeric(num2) |
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This looks like a similar operation to what you did before... hmm... this would make a good method (prompting the user for a number and reading it in).
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