what exactly does strcmp() do?

Code:

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int strcmp ( const char *s1, const char *s2 );

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strcmp will accept two strings. It will return an integer. This integer will either be:

Quote:

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Negative if s1 is less than s2.
Zero if s1 and s2 are equal.
Positive if s1 is greater than s2.

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What exactly is this checking? How is 'John' less, more than or equal to 'Joey'...I guess is my question.

Lookup John and Joey in a dictionary.

< is "John is before Joey" in the dictionary
> is "John is after Joey" in the dictionary

= 0 means that they are the same word.

Obviously, so it checks which comes first in the dictionary?

Not quite: it compares null terminated strings similiar to how you could use a dictionary to compare words.

It performs a "lexicographical" comparison. Google that for more info

Quote:

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Originally Posted by iMalc

It performs a "lexicographical" comparison. Google that for more info

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Perfect thanks.

Or use the man page.