1typedef struct str { short x, y;} S; 2 3static short 4bar (short ch, short sl, short sr, short tl, short tr) 5{ 6 return 0; 7} 8 9void 10foo (short ch, S *pi, short nc, S *po) 11{ 12 short clo, chi, lo, hi; 13 14 po->x = bar (ch, clo, chi, pi[lo].x, pi[hi].x); 15 po->y = bar (ch, clo, chi, pi[lo].y, pi[hi].y); 16} 17