Address of last bit of an integer in C

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Hi All..

How can i find the address of last bit of an integer in C.

Thanks

Posted 15-Jun-12 0:21am

jaitunjai singh

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4 solutions

Solution 2

if you mean the 2^0 bit, you can't get the address of that ... you can get the address of each of the constituent bytes of that integer

However, that depends on the endian[^] format of the system AND the width of an integer in that system, 16, 32 or 64 bits[^]

Posted 15-Jun-12 0:41am

barneyman

Solution 4

If you mean the 2^0 bit, you can find its value with modulus 2 of the integer: INTEGER % 2.

Posted 15-Jun-12 6:22am

George L. Jackson

Solution 3

Thanks to all

and how can i find the value of least significant bit of an integer.

Posted 15-Jun-12 1:20am

jaitunjai singh

Comments

Richard MacCutchan 15-Jun-12 9:16am

value = integer & 1;

Sandeep Mewara 15-Jun-12 11:15am

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OriginalGriff · Accepted Answer · 2012-06-15T00:39:00

A "bit" doesn't have an address - it is at a specific position within a byte / word / long word which will have an address.

And which bit do you mean is the "last bit"? The most significant? Or the least significant?

Just to make things worse, there is no standard for the address of the most or least significant byte of an integer - it depends on whether the target processor is "least-significant-first" - also known as "Little-endian" - or "most-significant-first" - also known as "Big-endian"

So sorry, we can't give you an answer that works in code: C systems can be either-endian, and a bit doesn't have an address, so can't be pointed at!