If you carefully look at this example you will see with atoi when it runs into a string it gives the integer value of 0. So I was wondering how you tell the difference between the integer value of 0 and a string that got converted to 0.
http://www.tutorialspoint.com/c_standard_library/c_function_atoi.htm
You can't tell from return value from atoi alone. If it returns 0, it's easy enough to check if the string itself is actually "0" (i.e., '0' followed by '\0').
That makes sense :). Thank you.
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