Ptt 大爆卦 | Strtoul - 前往 https://stackoverflow.com/questions/53764099/how-to-use-strtoul-to-parse-string-where-zero-may-be-valid

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How to use `strtoul` to parse string where zero may be valid?

Read further the man page: Since strtoul() can legitimately return 0 or ULONG_MAX ( ULLONG_MAX for strtoull() ) on both success and failure, ...

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