1typedef struct { 2 int a, b, c, d, e, f; 3} A; 4 5void foo (A *v, int w, int x, int *y, int *z) 6{ 7} 8 9void 10bar (A *v, int x, int y, int w, int h) 11{ 12 if (v->a != x || v->b != y) { 13 int oldw = w; 14 int oldh = h; 15 int e = v->e; 16 int f = v->f; 17 int dx, dy; 18 foo(v, 0, 0, &w, &h); 19 dx = (oldw - w) * (double) e/2.0; 20 dy = (oldh - h) * (double) f/2.0; 21 x += dx; 22 y += dy; 23 v->a = x; 24 v->b = y; 25 v->c = w; 26 v->d = h; 27 } 28} 29 30int main () 31{ 32 A w = { 100, 110, 20, 30, -1, -1 }; 33 bar (&w,400,420,50,70); 34 if (w.d != 70) 35 abort(); 36 exit(0); 37} 38