Why do I keep getting a parse error?

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Carlos Hernandez
Carlos Hernandez 2018-4-10
评论： Carlos Hernandez 2018-4-14
Hi Matlabers!
I am trying to make code to run the blackjack card game on Matlab as a class project and keep running into a parse error. I want to label the cards such as AS for "ace of spades", 2S for "two of spades", and so forth for the rest of the cards... In the code, I write the following:
AS=1 2S=2 3S=3
I continue the code for the rest of the cards but omit that here for the sake of brevity. When I try to run the code, AS=1 has no problem but 2S=2 and 3S=3 have a parse error that reads as:
Error: File: Project.m Line: 8 Column: 2 Unexpected MATLAB expression.
I see that I can get around this by renaming the variables as spade2=2 and spade3=3, etc. but this doesn't look as nice to me and would rather keep it as I was originally trying to do. OR even better, I would love it if I can replace the S in 2S or 3S with a picture of an actual spade. The same goes for a diamond, club, and heart for the rest of the cards. I'm hoping there is someone here that knows what to do!
P.S. I would also like AS "ace of spades" to take on the value of either 1 or 11 given the choice of the user. I know that I can write something such as:
AS = input( 'Enter value for Ace: ');
but doing this would allow the user to input any number they want. I would like to give them the input option, but only allow either a value of 1 or 11.
Thank's Matlabers!
  2 个评论
KSSV
KSSV 2018-4-10
2S=2 3S=3
The above is not allowed......you may use
S2=2 ; S3=3 ; instead

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回答（1 个）

Walter Roberson
Walter Roberson 2018-4-10
There is no possibility of naming a variable beginning with a number. You must have a letter as the first character. Only letters and digits and underscore are permitted.

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