From: "Graham Warren" Newsgroups: comp.os.msdos.djgpp Subject: Bit field query Date: Thu, 4 Oct 2001 20:43:59 +0100 Organization: Tesco ISP Lines: 35 Message-ID: <9pidst$kgu$1@epos.tesco.net> NNTP-Posting-Host: dialup.62-172-20-29.tesco.net X-Newsreader: Microsoft Outlook Express 4.72.3110.1 X-MimeOLE: Produced By Microsoft MimeOLE V4.72.3110.3 To: djgpp AT delorie DOT com DJ-Gateway: from newsgroup comp.os.msdos.djgpp Reply-To: djgpp AT delorie DOT com I have a question about bit-fields. In a program I have defined a bit-field using the code shown below. /* define bit-field */ struct { unsigned int b0 : 1; unsigned int b1 : 1; unsigned int b2 : 1; unsigned int b3 : 1; unsigned int b4 : 1; unsigned int b5 : 1; unsigned int b6 : 1; unsigned int b7 : 1; } bit_field; /* */ My questions are: would bit_field.b0 be the furthest left or furthest right bit if the byte is written out 00000000? Would this change if more bits were defined in the bit field to make it spill over into a larger than 1 byte area? Also which bit in 00000000 is referred to as the most-significant and which is the least-significant? Thankyou Graham Warren