View Compilation Error

0_0_17557016_13635.c: In function 'cmp':
0_0_17557016_13635.c:10:12: error: 'game' undeclared (first use in this function)
  return (*(game*)a).d<(*(game*)b).d?1:-1;
            ^
0_0_17557016_13635.c:10:12: note: each undeclared identifier is reported only once for each function it appears in
0_0_17557016_13635.c:10:17: error: expected expression before ')' token
  return (*(game*)a).d<(*(game*)b).d?1:-1;
                 ^
0_0_17557016_13635.c:10:31: error: expected expression before ')' token
  return (*(game*)a).d<(*(game*)b).d?1:-1;
                               ^