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Problem: **Error**:Invalid array bound specification. 
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Joined: Sun Mar 02, 2008 9:41 am
Posts: 25
Post Problem: **Error**:Invalid array bound specification.

I am trying to define the following array in a function:

void environment(){
int y = TargetY * 2;
int x = TargetX * 2;
int array[y][x];

And i keep getting the following errors:
**Severe*:Constant Expression Expected
**Error**:Invalid array bound specification.
**Error**:Expected->';'. Found ', '
**Error**:Unexpected scanner token-> ', '
**Error**:Unexpected scanner token-> '['
*Warning*:Meaningless statement -- no code generated

Would anyone know why please?


Sun Mar 09, 2008 2:16 pm
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Joined: Sat Mar 01, 2008 12:52 pm
Posts: 1030
you may use only constant dimensions in declaration of arrays:
void environment(){
int y;
int x; // are both variables, no constants!

// int array[y][x]; // ERROR, because x, y are variables!
// declare:
const int yMax=40; // 40 or 30 or 50 or sth. else
const int xMax=40; // xMax and yMax are constants!

int array[yMax][xMax]; // works fine!

y = TargetY * 2; // where has Targetx/y been declared?
x = TargetX * 2; 

// and now use only array[0...y][0...x]


sort of dynamic memory allocation on the heap like the following ANSI C construct does not work in RobotC (as far as I know):
int *array;
int x;
int y;
x=TargetX*2; // TargetX/Y have to be defined earlier

array= (int *) malloc(y*x*sizeof(int)) ;

HaWe aka Ford
#define S sqrt(t+2*i*i)<2
#define F(a,b) for(a=0;a<b;++a)
float x,y,r,i,s,j,t,n;task main(){F(y,64){F(x,99){r=i=t=0;s=x/33-2;j=y/32-1;F(n,50&S){t=r*r-i*i;i=2*r*i+j;r=t+s;}if(S){PutPixel(x,y);}}}while(1)}

Mon Mar 10, 2008 12:54 pm

Joined: Sun Mar 02, 2008 9:41 am
Posts: 25

Thanks for the reply.

I did try malloc but it does not work, i can confirm that.

Thanks for your reply.


Mon Mar 10, 2008 5:12 pm
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