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I have an assignment where I am given 6 files which all contain the same 7 functions. These functions are for making and using linked lists. Each of the different files has different bugs in it. I am provided a main.c file which I am to add extend to catch all the errors for each of the 6 files. Preferably it should print to stdout the error. The main.c file already has some examples. When the main.c file is tested with the correct version of the 7 functions, it should not return any error. 

Please leave comments in main.c to explain what you are doing and why you are doing it.