1int 2sub1 (int i, int j) 3{ 4 typedef struct 5 { 6 int c[i+2]; 7 }c; 8 int x[10], y[10]; 9 10 if (j == 2) 11 { 12 memcpy (x, y, 10 * sizeof (int)); 13 return sizeof (c); 14 } 15 else 16 return sizeof (c) * 3; 17} 18 19int 20main () 21{ 22 typedef struct 23 { 24 int c[22]; 25 }c; 26 if (sub1 (20, 3) != sizeof (c)*3) 27 abort (); 28 29 return 0; 30} 31