This is my code. When I access dtr array in initImg function it gives a stack overflow exception. What might be the reason?
#define W 1000
#define H 1000
#define MAX 100000
void initImg(int img[], float dtr[])
{
for(int i=0;i<W;i++)
for(int j=0;j<H;j++)
img[i*W+j]=255;
for(int j=0;j<H;j++)
{
img[j] = 0;
img[W*(W-1)+j] = 0;
}
for(int i=0;i<W;i++)
{
img[i*W] = 0;
img[i*W+H-1] = 0;
}
for(int i=0;i<W;i++)
for(int j=0;j<H;j++)
{
if(img[i*W+j]==0)
dtr[i*W+j] = 0; // <------here
else
dtr[i*W+j] = MAX; // <------here
}
}
int main()
{
int image[W*H];
float dtr[W*H];
initImg(image,dtr);
return 0;
}
This:
int image[W*H];
float dtr[W*H];
Creates each a 4 * 1000 * 1000 ~ 4 MB array into the stack. The stack space is limited, and usually it's less than 4 MB. Don't do that, create the arrays in the heap using new.
int *image = new int[W*H];
float *dtr = new float[W*H];