Matrix dimensions must agree - 3 chances loop
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Hi, I need help with a code I'm trying to run.
I'm trying to run it so you have 3 chances to guess a string variable correctly, and after the third, it says incorrect, or if any of the guesses are correct then the code ends and just says you have guessed correctly.
The code is shown below that I am using: (The error shown is that Matrix dimensions must agree - the code runs perfectly with correct guesses or when I guess food which has 5 letters)
FavFood=('Pizza');
y=input('What is my favourite Food? ','s');
if y==FavFood
disp('Well done, you guessed correctly');
else x=input('Sorry, you guessed wrong. Try again: ','s');
if x==FavFood
disp('Well done, you guessed correctly');
else z=input('Sorry, you guessed wrong. Try again: ','s');
if z==FavFood
disp('Well done, you guessed correctly');
else disp('Sorry, you ran out of chances.');
end
end
end
Many thanks,
EDIT: typo
采纳的回答
James Tursa
2017-4-4
编辑：James Tursa
2017-4-4
Your fundamental problem is how you are doing string compares. Do not use the == operator since that is an element-wise operator and is not doing what you think it is doing in your if-tests. Instead, use a function that works with strings, such as strcmpi. E.g.,
if strcmpi(y,FavFood)
4 个评论
Bradley F
2017-4-4
James Tursa
2017-4-4
编辑：James Tursa
2017-4-4
If you want to be case sensitive, you could use "strcmp" or "isequal". Or you could use a combination of the "upper" function with these for your test to remain case insensitive.
Bradley F
2017-4-4
James Tursa
2017-4-5
Well, you could always write your own function. It would have to check to see that both arguments are strings and both have the same dimensions, and then something like all(upper(arg1)==upper(arg2)) to check if all the individual letters match.
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