<Tr> <Td> gets </Td> <Td> N / A </Td> <Td> Reads a byte string from stdin until a newline or end of file is encountered (deprecated in C99, removed from C11) </Td> </Tr> <Tr> <Td> putchar </Td> <Td> putwchar </Td> <Td> Writes a byte / wchar_t to stdout </Td> </Tr> <Tr> <Td> puts </Td> <Td> N / A </Td> <Td> Writes a byte string to stdout </Td> </Tr> <Tr> <Td> ungetc </Td> <Td> ungetwc </Td> <Td> Puts a byte / wchar_t back into a file stream </Td> </Tr>

What is the meaning of #include stdio.h in c