How to find the length of an LPCSTR

Question

I'm trying to convert an LPCSTR to an integer using atoi(), and to verify that the conversion occurred successfully I want to count the number of digits in the integer it produced and the original LPCSTR (it should contain nothing but integers)

I'm having a hard time finding a good way to calculate the length of the LPCSTR. So far the only way seems to be just counting until I get to a '/0'

Any suggestions for a better method?

Thanks

Answer 1

Isn't that what strlen does?