Compilare: user.cpp:21:37: warning: always_inline function might not be inlinable [-Wattributes] __attribute__((always_inline)) void put_number(int x) ^~~~~~~~~~ user.cpp:6:36: warning: always_inline function might not be inlinable [-Wattributes] __attribute__((always_inline)) int get_number() ^~~~~~~~~~ user.cpp: In function ‘int main()’: user.cpp:41:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cautbin.in", "r", stdin); ^ user.cpp:42:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cautbin.out", "w", stdout); ^ user.cpp:44:41: 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); ^