https://stackoverflow.com › questions › 8024440

The error message tells you that none of the object files you're linking against contains a definition for avergecolumns. 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 ...

https://stackoverflow.com › questions › 5559250

You'll need to specify both files, something like: gcc testpoint.c point.c. ...so that it knows to link the functions from both together. With the code as it's written right now, however, you'll then run into the opposite problem: multiple definitions of main.

https://openclassrooms.com › forum › sujet › les-sources-de-l-erreur-undefined-reference-to

Cette erreur est très simple, mais fréquente chez le débutant ! On la rencontre très souvent sur les fonctions, la fonction est bien déclarée, donc la compilation est effectuée, mais le problème se trouve au moment de l'édition des liens, le linker ne trouve pas la définition de la fonction !

https://www.geeksforgeeks.org › fix-undefined-reference-error-in-cpp

In C++, the undefined reference error typically occurs during the linking phase of compilation. This error indicates that the compiler knows about a function or variable (it has been declared), but it cannot find the actual implementation (definition) during the linking process.

https://thelinuxcode.com › undefined-reference-function-c

An undefined reference error occurs when you call a function that is declared but not defined anywhere accessible to the compiler. Since the function body is missing, the compiler raises this error when linking the object files together into an executable.

https://towardsdev.com › navigating-undefined-reference-errors-in-programming-causes-and...

An undefined reference error occurs during the linking phase of compilation when the compiler can’t locate the definition of a function or variable declared elsewhere. Potential Causes: Missing Function Definitions: If a function is declared but not defined, the linker can’t find its implementation.

https://www.delftstack.com › fr › howto › cpp › undefined-reference-to-main-cpp

Correction de l’erreur Undefined Reference to main() en C++. Ce rapide tutoriel abordera brièvement l’une des erreurs les plus courantes et tout aussi critiques dans la programmation C++, c’est-à-dire Undefined Reference to Main().

https://askubuntu.com › questions › 1348199

Adding #include "Helper.h" to your main.cpp makes the declaration of Helper::IsStringNumeric visible to the compiler, but you still need to compile Helper.cpp to object code in order to make the definition of Helper::IsStringNumeric available when you link your main program.

https://www.positioniseverything.net › cpp-undefined-reference

You can fix undefined reference in C++ by investigating the linker error messages and then providing the missing definition for the given symbols. Note that not all linker errors are undefined references, and the same programmer error does not cause all undefined reference errors.

https://www.delftstack.com › howto › cpp › cpp-undefined-reference-to-class-function

This tutorial briefly discusses one of the most common and equally critical errors in C++ programming (i.e., Undefined Reference to a Class::Function()). First, we will briefly discuss different errors while coding in C++. Then, we will explain the causes and fixes for the undefined reference error.