1  #include <string.h>
       2  
       3  struct coord
       4  {
       5    double x;
       6    double y;
       7    double z;
       8  };
       9  
      10  struct tri {
      11    struct coord verts[3];
      12  };
      13  
      14  double test_1 (void)
      15  {
      16    struct tri t;
      17    memset (&t, 0, sizeof (struct tri));
      18    return t.verts[1].y;
      19  }
      20  
      21  int test_2 (const struct coord *c1, const struct coord *c2, double r_squared)
      22  {
      23    double dx = c1->x - c2->x;
      24    double dy = c1->y - c2->y;
      25    double dz = c1->z - c2->z;
      26    return (dx * dx) + (dy * dy) + (dz * dz) <= r_squared;
      27  }
      28  
      29  int test_3 (const struct coord *c1, const struct coord *c2, struct coord *out)
      30  {
      31    out->x = c1->x + c2->x;
      32    out->y = c1->y + c2->y;
      33    out->z = c1->z + c2->z;
      34  }