Compilare: user.cpp: In function ‘int addHash(int, int)’: user.cpp:25: warning: no return statement in function returning non-void user.cpp: In function ‘int existHash(int, int)’: user.cpp:42: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void citire()’: user.cpp:55: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result user.cpp:56: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:59: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result