Matlab Count to 10 game

Hello, I'm currently working on this exercise and I don't know how to continue. Here is the exercise: In this exercise you are required to implement a simple two player counting game. The game starts by setting the count to 0. The two players should take alternative turns selecting between the numbers 1 and 2. In each turn the number the current player selects gets added to the count. The player who reaches a value 10 or larger wins the game. The program should check for input correctness. The image below has a sample run.

I currently have this:

clear
clc
sum=0;
player=1;
while (sum<10);
  count=input('Enter 1 or 2: ');
  fprintf('Player %d',player);
  if (count==1|count==2)
  sum=sum+count;
  else
      disp('Incorrect Input');
  end
end

I know I'm quite far from solving the problem and help would be appreciated.

[Walter Roberson]

Do not name a variable "sum" as that interferes with using the important MATLAB routine named "sum".

Answer 1

[Image Analyst]

You can check for correctness by making sure it's correct in the first place. Use questdlg to give them a choice of only 1 or 2:

clear
clc
theSum=0;
player=1;
while (theSum < 10);
  promptMessage = sprintf('The sum so far = %d\nPlayer #%d\nDo you want 1 or 2?', theSum, player);
  titleBarCaption = 'Continue?';
  button = questdlg(promptMessage, titleBarCaption, '1', '2', 'Quit', '1');
  if strcmpi(button, '1')
    count = 1;
  elseif strcmpi(button, '2')
    count = 2;
  elseif strcmpi(button, 'Quit')
    break;
  end
  
  fprintf('Player %d selected %d\n',player,count);
  theSum=theSum+count;
  % Break out if the count >= 10.
  if theSum >= 10
    break;
  end
  % Switch to the next player.
  player = rem(player, 2) + 1;
end
if theSum >= 10
  message = sprintf('Player %d wins!\n',player);
  fprintf('%s\n', message);
  uiwait(helpdlg(message));
end