Compilare: user.cpp: In function ‘int lb(int, int)’: user.cpp:27: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int ub(int, int)’: user.cpp:42: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘unsigned int getInt()’: user.cpp:56: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result user.cpp:60: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result