// using variable-length array in C99
// Avoid dynamic allocated arrays, which introduces pointers , bad for static analysis tools
#include <stdlib.h>
int main(int argc,char *argv[])
{
  int i, j;
  int len = 20; 

  if (argc>1)
    len = atoi(argv[1]);

  double a[len][len];

  for (i=0; i< len; i++)
    for (j=0; j<len; j++)
      a[i][j] = 0.5; 

#pragma omp parallel for 
  for (i = 0; i < len - 1; i += 1) {
    for (j = 0; j < len ; j += 1) {
      a[i][j] += a[i + 1][j];
    }
  }
  return 0;
}