Compilare: user.cpp: In function ‘int getInt(FILE*)’: user.cpp:25:15: warning: variable ‘sign’ set but not used [-Wunused-but-set-variable] int nr=0, sign=1; ^ user.cpp: In function ‘char getChar(FILE*)’: user.cpp:19:35: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buf, 1, BUF_SIZE, f); ^