MATLAB: How to spilt long integer number into pairs

long divisionsquare root

Hi all,
I am working to solve the problem of finding the square root by using long division operation?
I know that there is a build in square root function but in my case I have to build my own function to find a square root by using a long division!
The first step of finding the square root by long division is decompose a number in two pairs and then work from that point.
ex: 1987 –> First pair(87), second pair(19) &&&& 198 –> First pair(98), second pair(1) as we should start pairing from right to left!
Could anyone help me to solve this issue? I wish if someone already has the code for perform square root by division! This will make live easier : )
Cheers,

Best Answer

To split the integer x into pairs according to your description:
 x = 12345
 numDigitsInX = floor(log10(x))+1;
 pairs = zeros(ceil(numDigitsInX/2),1);
 for ii = 1:length(pairs)
     pairs(ii) = mod(x,100);
     x = (x-pairs(ii))/100;
 end
Related Question