Adding several modifications
Taking out unused variabĺe 'o_matrix'
Makefile with debug option
Adding missing 'return'. Still with problems to run the program correctly (segfault when trying to attribute '+' in the matrix
Segmentation fault solved after modifications: now we create a new string to be pointed in place of trying to modify it after being alocated
Function make_output_line now working as expected. Now it does not try to change the output, but returns a string with MAX_WIDTH for whom call it.
Program now working as expected - analysis (look for errors) and convert (assembles) the code to the bynary code readable by HIPO.
Implementing new feature: now function recognizes constant numbers stored among the code (all started with '+' signal in HIPO's assembly).