im struggling with this one guys like the oddsum and the rest is undefeatable with me

its kinda fading

[Rik]

I don't really see what this has to do with Matlab. Please edit your question to show how it relates to Matlab, what the problem is, and what you have tried so far. You can reopen the question to edit it.

[Xenial]

function smart_plotter()
    nric = input('Enter NRIC number: ', 's');

    % Check if the NRIC has exactly 7 digits
    if length(nric) ~= 8
        error('Sorry, the NRIC should be exactly 7 digits.');
    end

    % Check if the first character is 'S' or 'G'
    if ~(nric(1) == 'S' || nric(1) == 'G')
        error('Invalid NRIC format.');
    end

    % Check if there are any non-digit characters in the numeric portion of the NRIC
    numericPortion = nric(2:end-1);
    if ~all(isstrprop(numericPortion, 'digit'))
        error('Sorry, the numeric portion of the NRIC should only contain digits.');
    end

    % Extract the first character to determine the status
    status = upper(nric(1));

    % Convert the numeric portion to a numeric array
    numericArray = str2double(numericPortion);

    % Calculate the sum of digits in odd-numbered positions
    oddSum = sum(numericArray(1:2:end)) * 3;

   

    
    % Sum the digits in even positions
    evenSum = sum(numericArray(2:2:end));

    % Calculate the total sum
    totalSum = oddSum + evenSum;

    % Calculate the remainder when divided by 11
    remainder = mod(totalSum, 11);

    % Display the intermediate calculations
    fprintf('Odd Sum: %d\n', oddSum);
    fprintf('Even Sum: %d\n', evenSum);
    fprintf('Total Sum: %d\n', totalSum);
    fprintf('Remainder: %d\n', remainder);

    % Determine the checksum letter based on the status
    if status == 'S'
        checksumLetter = getChecksumLetterS(remainder);
    elseif status == 'G'
        checksumLetter = getChecksumLetterG(remainder);
    else
        error('Invalid NRIC format.');
    end

    % Add the checksum letter to the NRIC
    nricWithChecksum = [nric, checksumLetter];

    fprintf('NRIC with checksum: %s\n', nricWithChecksum);
end

function letter = getChecksumLetterS(remainder)
    switch remainder
        case 0
            letter = 'A';
        case 1
            letter = 'B';
        case 2
            letter = 'C';
        case 3
            letter = 'D';
        case 4
            letter = 'E';
        case 5
            letter = 'F';
        case 6
            letter = 'G';
        case 7
            letter = 'H';
        case 8
            letter = 'I';
        case 9
            letter = 'J';
        case 10
            letter = 'K';
        otherwise
            error('Invalid remainder.');
    end
end

function letter = getChecksumLetterG(remainder)
    switch remainder
        case 0
            letter = 'K';
        case 1
            letter = 'L';
        case 2
            letter = 'M';
        case 3
            letter = 'N';
        case 4
            letter = 'O';
        case 5
            letter = 'P';
        case 6
            letter = 'Q';
        case 7
            letter = 'R';
        case 8
            letter = 'S';
        case 9
        letter = 'T';
    case 10
        letter = 'U';
    otherwise
        error('Invalid remainder.');
end
end

here is my code and when i type some example NRIC numb like S2307605 SO the odd numb suppose to be 39 BUT it doesnt and i still havent known wheres the wrong line

[Xenial]

[Xenial]

Answer 1

[Stephen23]

N = 'S2307605'; % must be character
V = N(2:end)-'0'

V = 1×7

2 3 0 7 6 0 5

R = rem(sum(3*V(1:2:end))+sum(V(2:2:end)),11)

R = 5

S = struct('S','A':'K','G','K':'U');
Z = [N,S.(N(1))(1+R)]

Z = 'S2307605F'

[Stephen23]

Lets fix your code too:

nric = 'S2307605';
assert(ischar(nric)&&numel(nric)==8,'The NRIC must have 8 characters.')
% Check if the first character is 'S' or 'G'
assert(any(strncmp(nric,{'S','G'},1)),'The first character must be "S" or "G".')
% Check if there are any non-digit characters in the numeric portion of the NRIC
numericPortion = nric(2:end);
assert(all(isstrprop(numericPortion, 'digit')),'The numeric portion of the NRIC should only contain digits.')
% Extract the first character to determine the status
status = nric(1);
% Convert the numeric portion to a numeric array
numericArray = sscanf(numericPortion,'%1d',[1,Inf]);
% Calculate the sum of digits in odd-numbered positions
oddSum = sum(3*numericArray(1:2:end));
% Sum the digits in even positions
evenSum = sum(numericArray(2:2:end));
% Calculate the total sum
totalSum = oddSum + evenSum;
% Calculate the remainder when divided by 11
remainder = mod(totalSum, 11);
% Display the intermediate calculations
fprintf('Odd Sum: %d\n', oddSum);

Odd Sum: 39

fprintf('Even Sum: %d\n', evenSum);

Even Sum: 10

fprintf('Total Sum: %d\n', totalSum);

Total Sum: 49

fprintf('Remainder: %d\n', remainder);

Remainder: 5

% Determine the checksum letter based on the status
if status == 'S'
    checksumLetter = getChecksumLetterS(remainder);
elseif status == 'G'
    checksumLetter = getChecksumLetterG(remainder);
else
    error('Invalid NRIC format.');
end
% Add the checksum letter to the NRIC
nricWithChecksum = [nric, checksumLetter];
fprintf('NRIC with checksum: %s\n', nricWithChecksum);

NRIC with checksum: S2307605F

function letter = getChecksumLetterS(remainder)
switch remainder
    case 0
        letter = 'A';
    case 1
        letter = 'B';
    case 2
        letter = 'C';
    case 3
        letter = 'D';
    case 4
        letter = 'E';
    case 5
        letter = 'F';
    case 6
        letter = 'G';
    case 7
        letter = 'H';
    case 8
        letter = 'I';
    case 9
        letter = 'J';
    case 10
        letter = 'K';
    otherwise
        error('Invalid remainder.');
end
end
function letter = getChecksumLetterG(remainder)
switch remainder
    case 0
        letter = 'K';
    case 1
        letter = 'L';
    case 2
        letter = 'M';
    case 3
        letter = 'N';
    case 4
        letter = 'O';
    case 5
        letter = 'P';
    case 6
        letter = 'Q';
    case 7
        letter = 'R';
    case 8
        letter = 'S';
    case 9
        letter = 'T';
    case 10
        letter = 'U';
    otherwise
        error('Invalid remainder.');
end
end