From 69d0ac7c81eed0c9ceaf1f19d9dcfbe2431ba55c Mon Sep 17 00:00:00 2001 From: Paul Jungeblut Date: Tue, 25 Nov 2014 17:48:20 +0100 Subject: Kombinatorik fertig --- sonstiges/bitOps.cpp | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) (limited to 'sonstiges/bitOps.cpp') diff --git a/sonstiges/bitOps.cpp b/sonstiges/bitOps.cpp index df8cd8f..20ca532 100644 --- a/sonstiges/bitOps.cpp +++ b/sonstiges/bitOps.cpp @@ -1,22 +1,22 @@ -[lsb: 0-th bit, msb: n-th bit,] +// [lsb: 0-th bit, msb: n-th bit,] -Get j-th bit: +//Get j-th bit: (a & (1 << j)) != 0 -Set j-th bit: +//Set j-th bit: a |= (1 << j) -Clear j-th bit: +//Clear j-th bit: a &= ~(1 << j) -Toggle j-th bit: +//Toggle j-th bit: a ^= (1 << j) -Get value of first set bit: +//Get value of first set bit: (a & -a) -Turn on all bits: +//Turn on all bits: a = -1 -Turn on first n bits: +//Turn on first n bits: a = (1 << n) - 1 -- cgit v1.2.3