View Compilation Error

0_0_35633429_13757.c: In function 'pri':
0_0_35633429_13757.c:6:2: error: unknown type name 'bool'
  bool pre[10000];
  ^
0_0_35633429_13757.c: In function 'main':
0_0_35633429_13757.c:32:3: error: 'pq' undeclared (first use in this function)
   pq <= m and a / b <= p / q <= 1,
   ^
0_0_35633429_13757.c:32:3: note: each undeclared identifier is reported only once for each function it appears in
0_0_35633429_13757.c:32:11: error: expected ';' before 'and'
   pq <= m and a / b <= p / q <= 1,
           ^