View Compilation Error

0_0_29361597_17543.c:2:1: error: unknown type name 'bool'
 bool judge(int a[],int n,int l,int r,int d){
 ^
0_0_29361597_17543.c: In function 'judge':
0_0_29361597_17543.c:9:11: error: 'true' undeclared (first use in this function)
    return true;
           ^
0_0_29361597_17543.c:9:11: note: each undeclared identifier is reported only once for each function it appears in
0_0_29361597_17543.c:13:9: error: 'false' undeclared (first use in this function)
  return false;
         ^