C
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Why this exists The earlier Control Flow and Functions page shows how to write a function. This page answers the questions that come next, and that trip up nearly everyone coming from Python or JavaScript: Why did my…
C Basics: Passing Data to Functions, Function Pointers, qsort and Dispatch Tables
What actually happens when you pass a value to a function (a copy), how pointers let a function change the caller's data, how to return several results, and how function pointers power qsort, bsearch and command tables.
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