C++ error, Undefined reference class

Question

Why does codeblocks give this error \"Undefined reference to class::classfunction()\" It happens when a class is created in a separated file.All of these files are in the same f

Answer 1

You need to link both main.o and class.o into your executable. The exact command depends on your compiler and OS. For g++ the command would look something like

g++ -o main main.cpp class.cpp