source: CIVL/examples/languageFeatures/pointerSubtraction.cvl@ 63d9cfc5

#include <stdlib.h>
#include <civlc.h>

int main(){
  double (*p)[2];
  double * q;
  double a[3][2];
  double b[3][2];
  double **x;

  p = a; //p == &a[0]
  q = &b[0][0];
  p += 1;
  q += 6;
  x = (double **)$malloc($root, sizeof(double *) * 3);

  for(int i=0; i<3; i++)
    x[i] = (double *)$malloc($root, sizeof(double) * 2);

  $assert((p - a) == 1);
  $assert((q - &b[0][0]) == 6);
  $assert(&x[0] - &x[2] == -2);
  $assert(&x[0][1] - x[0] == 1);
  $assert(&x[3] - x == 3);
  for(int i=0; i<3; i++)
    $free(x[i]);

  $free(x);
  return 0;
}