Compilare: user.cpp: In member function ‘pfstream& pfstream::operator>>(Kangaroo&)’: user.cpp:62:2: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:70:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("mayonaka.out", "w", stdout); ^ user.cpp: In constructor ‘pfstream::pfstream(const char*)’: user.cpp:39:28: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buf, maxSize, 1, f); ^ user.cpp: In member function ‘void pfstream::move()’: user.cpp:27:29: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buf, maxSize, 1, f); ^