Why C's Built-in Integer Parsers Are Fundamentally Broken

C's standard library lacks a truly reliable integer parser, with atol exposing undefined behavior on overflow and strtol requiring careful error handling to work correctly. This decades-old design flaw forces developers to write boilerplate error-checking code for a basic operation, highlighting why modern languages like C++ introduced safer alternatives. Understanding these limitations is essential for developers building secure systems that handle untrusted input.