agendatelefonica.cpp: In function `void adauga(int, char*)': agendatelefonica.cpp:22: warning: NULL used in arithmetic agendatelefonica.cpp:25: warning: comparison between signed and unsigned integer expressions agendatelefonica.cpp: In function `int numara(int, char*)': agendatelefonica.cpp:40: warning: NULL used in arithmetic agendatelefonica.cpp:43: warning: comparison between signed and unsigned integer expressions