Can someone help me how to add 2 hexadecimal numbers?
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I have ha and a as string, and I want to add 2 hexadecimal numbers.
ha = '6a09e667f3bcc908'
fn_bin2hex(a) = '73a54f399fa4b1b2'
Can someone help me how to add 2 hexadecimal numbers?
I tryed hex2dec and add 2 number,, but it doesn't work because these numbers are too big.
Is there a correct way to do this?
2 个评论
Walter Roberson
2020-6-13
hex2num() is limited to double, and so cannot be used with values greater than 0x20000000000000
采纳的回答
Ameer Hamza
2020-6-13
If you have symbolic toolbox, then define a function like this
hexsum = @(a, b) dec2hex(sum(str2sym({['0X' a], ['0X' b]})));
Example
ha = '6a09e667f3bcc908';
hb = '73a54f399fa4b1b2';
hc = hexsum(ha, hb);
Result
>> hc
hc =
'DDAF35A193617ABA'
4 个评论
Walter Roberson
2020-6-13
编辑:Walter Roberson
2020-6-13
'112E6FA4E89A97EA2' is correct, and your expectation of '12e6fa4e89a97ea2' is incorrect.
Look at the top nibble: you are adding 3 + d, which is 3 + 13, and that is going to overflow. Therefore the result must have one more digit than the inputs, 17 output digits when the inputs are 16 digits each.
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