Strcmp in textboxes of Rock Paper Scissors

Hi, I would like to compare strings in textboxes of rock, paper and scissors game. After comparing, display the result in another textbox. Here is the code. I don't know what to do next. Can someone please help me? Thank you.

if strcmp(get(handles.edit1,'string'), get(handles.edit4,'string'))

end

[Guillaume]

You haven't shown any code (of any value).

Answer 1

[Guillaume]

The whole purpose of the homework is to make you think about what the algorithm should be. Delegating that task to others is not going to help you learn.

You clearly haven't thought enough about what's involved in a game of rock/paper/scissors. If you had you'd realised that testing if the strings are the same is not enough. With that little snippet you've given the only thing that can be added is:

if strcmp(get(handles.edit1,'string'), get(handles.edit4,'string'))
   disp('stalemate');
else
   disp('somebody won. Don't know who');
end

Side note: I would encourage you to rename your controls. Player1 and Player2 would be much better than edit1, edit2.

[Jitti Somsiri]

How about this, can you please give me an example of comparing values in textboxes using strcmp? Thank you in advantage.

[Guillaume]

I gave you an example of comparing "values in textboxes using strcmp".

The code I wrote prints 'stalemate' if the values are the same and state that it can't solve it otherwise since comparing the two values for equality is not the way to go.

Answer 2

[Image Analyst]

Hint:

player1 = lower(strtrim(handles.edit1.String)); % Strip white space and convert to lower case.
player2 = lower(strtrim(handles.edit4.String));
Compare first letters:
if player1(1) == 'r' && player2(1) == 'r'
     % Draw
elseif player1(1) == 'r' && player2(1) == 'p'
     % Player2 wins.
elseif player1(1) == 'r' && player2(1) == 's'
     % Player1 wins.

and so on. There will be 9 possibilities. This is one way anyway. You can use strcmpi() if you want to compare the whole word instead of the first letters, but then you should put in some code to handle the case where the person puts in a wrong word, like 'rabbit', 'Shoe', or 'game'.

[Guillaume]

So as I said, comparing the players choice to each other for equality is not the way to got. Comparing these choices to something else, on the other hand...

[Image Analyst]

It might be better to use menu:

buttonNumber = menu('Pick one', 'Rock', 'Paper', 'Scissors')

to make sure we have a valid response. Then we have an integer - the button number - rather than a string which requires extra validation checks (if you want to be robust about it).

[Jitti Somsiri]

What is strtrim, player1(1) and player2(1)?

[Image Analyst]

strtrim() removes leading and trailing white space, like spaces, tabs, returns, etc. So it would make ' rock ' equal to 'rock'. To be robust you should take care to handle the case where the user puts in spaces before or after the word, even though they're not supposed to. You know what they say about users (pebcak and ID10T errors), so best to try to make your program robust, especially if it's easy enough to do so.

[Jitti Somsiri]

What is player1(1)? Does it mean the first letter of the string of player1?

[Image Analyst]

Exactly. Yes it does.