Web Reference: Jul 23, 2025 · In this article, we will discuss how to fix undefined reference errors in C++. Below are some practical situations of undefined reference errors and the solution to fix them: 1. Define the Function and Variables. Undefined reference errors are mostly caused due to missing function definitions. Nov 6, 2011 · The reason for that is that the function you've defined is called averagecolumns (in other words: you misspelled the function name when calling the function (and presumably in the header file as well - otherwise you'd have gotten a different error at compile time)). I totally understand the frustration of seeing an undefined reference error after working hard to code your logic. But don‘t worry – with this guide, you‘ll understand exactly what causes this error and how to fix it for good!
YouTube Excerpt: This video shows the solution of undefined reference to WinMain@16 error in VS Code.
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