Re: #define issues

FROM : Justin Spahr-Summers
DATE : Sat Apr 16 10:09:17 2005

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