Can someone help me how to add 2 hexadecimal numbers?
7 views (last 30 days)
Show older comments
Younghun Kim
on 13 Jun 2020
Edited: Walter Roberson
on 13 Jun 2020
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 Comments
Walter Roberson
on 13 Jun 2020
hex2num() is limited to double, and so cannot be used with values greater than 0x20000000000000
Accepted Answer
Ameer Hamza
on 13 Jun 2020
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 Comments
Walter Roberson
on 13 Jun 2020
Edited: Walter Roberson
on 13 Jun 2020
'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.
More Answers (0)
See Also
Categories
Find more on Logical in Help Center and File Exchange
Products
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!