now the thing is simple
i want to write binary data to a binary file
i wanna get a string length strlen(str)
then convert this length to binary e.g. 2 == 00000010
then write this length to a file as 1 byte "00000010 is one byte "
so i think we will use binary file
the problem is that i don't know how to get the length in binary and how to write this to a file in one byte length
any idea ???