2. Vorlesung

video @youtube.de; slides @uni-freiburg.de; Exercise Sheet @uni-freiburg.de; code from the lecture @uni-freiburg.de
comile with g++ with

g++ -c <c++ source file>

creates a .o file

withnm -C <.o file> you can see which functions are available in the file. (more info with man nm)
link the .o files with

   g++ <.o files>

you have to guarantee that each function is only given in one file.

This way you can incrementally change the code and you only need to recompile the changed parts of the code
Define the name of the executable with the -o <name of exe> option
Do not include other cpp files. Rather declare the needed functions. Example:

int functionname(<parameter types>);

Header files

Alternatively you can move the declaration of the functions to a header file (.h) and the include the header file
- add function descriptions only in the header file
- you can also add the .h files to the checkstyle
- add a header guard to the header file, which prevents including cyclic inclusion of a file with compiler instructions

#ifndef <VARIABLE NAME>
#define <VARIABLE NAME>

... code ...

#endif   // <VARIABLE_NAME>

name the variable of the header guard like the header file with the relevant parts of the path
include the header file to the source file of the function, to check if the header file is compatible with the function declaration

<target>: <dependencies>
   <commands>

note that there needs to be a tab in front of the commands