View Compilation Error

0_0_16808548_12006.c:4:1: error: unknown type name 'bool'
 bool isleap(int year)
 ^
0_0_16808548_12006.c: In function 'isleap':
0_0_16808548_12006.c:7:10: error: 'true' undeclared (first use in this function)
   return true;
          ^
0_0_16808548_12006.c:7:10: note: each undeclared identifier is reported only once for each function it appears in
0_0_16808548_12006.c:9:10: error: 'false' undeclared (first use in this function)
   return false;
          ^