Compilare: user.cpp:10:36: warning: always_inline function might not be inlinable [-Wattributes] __attribute__((always_inline)) int read() ^~~~ user.cpp: In function ‘int read()’: user.cpp:20:48: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer, 1, BUFFER_SIZE, stdin); ^ user.cpp:32:48: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer, 1, BUFFER_SIZE, stdin); ^