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HP 39gii: CASE Syntax



#5

I am trying to get a program where the user chooses to calculate the area between three shapes (circle, ring, and ellipse). Here is the sample code:


EXPORT AREAS()
BEGIN
RECT();
CHOOSE(C," ", "Circle");
CASE
IF C==1 THEN
INPUT(R);
PRINT(string(pi*R^2));
END;
END;

END;

I tried this with a semicolon with the first END, without the semicolon in the first END, but the result is the same: Syntax error. The online help/manual does not help. Any ideas? Thanks.


#6

I don't have a 39gii, so excuse my ignorance: Does CHOOSE work with just one option to choose from? Allthough unlikely, I imagine that could be a problem.

#7

Hi Eddy,

The CASE command dont work. It is a bug.
I hope this to be corrected in the next ROM

You must use imbricated IF THEN ELSE

Your syntax seems (in theory) correct

    CASE
IF Op==1 THEN ...; END;
IF Op==2 THEN ...; END;
IF Op==3 THEN ...; END;
END;

Note that you can use
PRINT(pi*R^2);
instead of
PRINT(string(pi*R^2));

PRINT("Area = " + pi*R^2);
is aloso correct. Not need of explicit 'string' conversion


Edited: 19 Feb 2013, 2:26 a.m.


#8

Quote:
Hi Eddy,

The CASE command dont work. It is a bug.
I hope this to be corrected in the next ROM

You must use imbricated IF THEN ELSE

Your syntax seems (in theory) correct

    CASE
IF Op==1 THEN ...; END;
IF Op==2 THEN ...; END;
IF Op==3 THEN ...; END;
END;

Note that you can use
PRINT(pi*R^2);
instead of
PRINT(string(pi*R^2));

PRINT("Area = " + pi*R^2);
is aloso correct. Not need of explicit 'string' conversion



Thankfully multiple IF THEN END structures work. Thanks.


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