Tcl-tk-tcl-bitwise-operators

Tcl-ビット演算子

Tcl言語でサポートされているビット単位の演算子を次の表にリストします。 変数 A が60を保持し、変数 B が13を保持すると仮定します-

Operator	Description	Example
&	Binary AND Operator copies a bit to the result if it exists in both operands.	(A & B) will give 12, which is 0000 1100
		Binary OR Operator copies a bit if it exists in either operand.
(A	B) will give 61, which is 0011 1101	^
Binary XOR Operator copies the bit if it is set in one operand but not both.	(A ^ B) will give 49, which is 0011 0001	<<
Binary Left Shift Operator. The left operands value is moved left by the number of bits specified by the right operand.	A << 2 will give 240, which is 1111 0000	>>

例

Tcl言語で利用可能なすべてのビット演算子を理解するために、次の例を試してください-

#!/usr/bin/tclsh

set a 60  ;# 60 = 0011 1100
set b 13  ;# 13 = 0000 1101

set c [expr $a & $b] ;# 12 = 0000 1100
puts "Line 1 - Value of c is $c\n"

set c [expr $a | $b;] ;# 61 = 0011 1101
puts "Line 2 - Value of c is $c\n"

set c [expr $a ^ $b;] ;# 49 = 0011 0001
puts "Line 3 - Value of c is $c\n"

set c [expr $a << 2] ;# 240 = 1111 0000
puts "Line 4 - Value of c is $c\n"

set c [expr $a >> 2] ;# 15 = 0000 1111
puts "Line 5 - Value of c is $c\n"

上記のプログラムをコンパイルして実行すると、次の結果が生成されます-

Line 1 - Value of c is 12

Line 2 - Value of c is 61

Line 3 - Value of c is 49

Line 4 - Value of c is 240

Line 5 - Value of c is 15