Verifying a 3 bit end-around rotation in C++ -

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• best practices circular shift (rotate) operations in c++ 15 answers

i need 3 bit left end around rotation in c++.

so far have:

a[i] = (a[i] << 3)|(a[i] >> 5); 

a unsigned char array.

is correct? if not how can fix it? best way test , see if correct?

thanks

looks fine me.

if want test it, work out bunch of inputs , outputs hand , check program produces them.

or devise method you're absolutely sure produce results (eg convert unsigned char binary string, rotate string, convert unsigned char) , compare 2 against 256 possible inputs.