Common mistakes with input and output
Comments and questions to John Rowe.
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| Wrong
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| Since scanf() is an intelligent function: it
skips over white space such as spaces and new-lines unless we
actively stop it. Such as the next mistake...
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For example, putting a comma after "%d" when reading two integers:
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| Note, this isn't always wrong
(for example we may be reading from a file with a fixed
data format), but we should avoid it if possible.
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| Wrong
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| Again, this isn't always wrong but in general it's
much better to tell the user what they are supposed to be entering.
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For variety we show a situation where we choose to warn of
the failure to open a file rather than exit the program:
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You only need to worry about these if you have not
followed our advice...
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Forgetting the ampersand
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| Wrong
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Not using %lg to read a double
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| Wrong
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