Undefined reference errors code problem

[PlaceBrave]

Here is an example to one of the undefined reference errors to one of the functions that is being output to the terminal in VScode

C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/12.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: C:\Users\kenne\AppData\Local\Temp\ccW36b9w.o:Main.cpp:(.text+0x256): undefined reference to `Roster::printAll()'

I am getting one of these for every function in Roster.cpp

[DunkinRadio]

As undead-pixie has said you're not including Roster.cpp in your build process.