Question

4. The goal in this problem is to add two 20 digit integers Sounds easy right? Try this: 1 11111111 1111; printf("%30.08 ) The issue is that the computer cannot store a 20 digit integer exactly. You need to find a ww around this but use non-standard data types (you can't just use a big float) Create a function whose input is two 20 digit integers. Return the sum of the integers. In your script, test your function by adding each pair of mumbers and displaying each result to the screen: • 11111111111111111111, 22222222222222222222 12345678901234567890,23456789012345678901 45678901234567890123, 56789012345678901234

how would i code this in MATLAB

Answer 1

Used vector to store numbers and add them using for loop

l l 1]; l l 2 2 l l l l 2 2 2 2 2 l l 2 2 l l l l 2 2 2 2 >> a =[l l l l l >> b = [2 2 2 2 2 >> sum(a,b) ans = . 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3

>> a =[1 iiiiiiiiiiiiiiiiii 1]; >> b = [9 9 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2]; >> sum(a,b) ans = - 7 1 0 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3

function res = sum (a,b) HN * 4 7 6 5 4 3 2 1 3 2 1 HH ON 1 i=20; res = zeros (1, 20); carry = 0; while i>o sum = carry+a (i) +b(i); res (i) = mod (sum, 10); carry = floor (sum/10); i=i-1; end if carry!=0 res = [carry res]: end end

Code

function res = sum(a,b)
  
i=20;
res = zeros(1,20);
carry = 0;
while i>0
sum = carry+a(i)+b(i);
res(i) = mod(sum,10);
carry = floor(sum/10);
i=i-1;
end
if carry!=0
res = [carry res];
end
end