Compilare: user.cpp: In function ‘void citireABC(int&, int&, int&)’: user.cpp:52: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result user.cpp: In function ‘void citire()’: user.cpp:62: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘void adauga(int)’: user.cpp:95: warning: comparison between signed and unsigned integer expressions