Re: #define issues

FROM : Aaron Boothello
DATE : Sat Apr 16 10:13:50 2005

Oh yeah,
sorry that was a mistype in the email. theyre actually ints(sorry about that).

So the code actually looks like(with correction):

typedef double matrix[16]

#define setvalue(matrix, row, col, value) ( matrix[row+col] = value)  //roughly looks like this
#define getvalue(matrix, row, col) (matrix[row+col])

the 'macros' are called as follows:
matrx m;
int a,b
double c;
a = row;
b = col;
c = value;

setvalue(m,a,b,c);

Every time i try to compile the code, i get a 'incompatible type in assignment' (for the setValue calls)

-Aaron
-------------------------------------------------------

On Saturday, April 16, 2005, at 04:10PM, Justin Spahr-Summers <justin.<email_removed>> wrote:

>You can't access indices in an array with non-integer types. Cast the
>doubles to ints before accessing the array.
>
>On 4/16/05, Aaron Boothello <<email_removed>> wrote:

>> Hey guys,
>> Thanks for your help on the dynamic arrays issue i was having.. managed to get it sorted out...
>>
>> Here's another issue i ran into. I should probably let you guys know that im porting some C++ code into a cocoa app.
>>
>> So the C++ code has dome definition and macros associated with them. the code looks like:
>>
>> typedef double matrix[16]
>>
>> #define setvalue(matrix, row, col, value) ( matrix[row+col] = value)  //roughly looks like this
>> #define getvalue(matrix, row, col) (matrix[row+col])
>>
>> the 'macros' are called as follows:
>> matrx m;
>> double a,b,c;
>> a = row;
>> b = col;
>> c = value;
>>
>> setvalue(m,a,b,c);
>>
>> Every time i try to compile the code, i get a 'incompatible type in assignment' (for the setValue calls)
>>
>> What am i doing wrong here ? Ive gone through the documentation and cant seem to figure it out.
>>
>> Thanks,
>> Aaron

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