What is the meaning of these two macros? ~~~~~
define ifc(x) (flag[x>>6]&(1<<((x>>1)&31)))
define isc(x) (flag[x>>6]|=(1<<((x>>1)&31)))
~~~~~
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What is the meaning of these two macros? ~~~~~
~~~~~
Name |
---|
1< 2 ^x
x<<1 -> 2*x
x>>1 -> x/2
x&1 -> x%2
x>>3 -> x/8 (8->2^3)