View Compilation Error

0_0_39233356_12833.c: In function 'main':
0_0_39233356_12833.c:8:17: error: unknown type name 'bool'
    8 |                 bool first=true;
      |                 ^~~~
0_0_39233356_12833.c:2:1: note: 'bool' is defined in header '<stdbool.h>'; did you forget to '#include <stdbool.h>'?
    1 | #include<stdio.h>
  +++ |+#include <stdbool.h>
    2 | 
0_0_39233356_12833.c:8:28: error: 'true' undeclared (first use in this function)
    8 |                 bool first=true;
      |                            ^~~~
0_0_39233356_12833.c:8:28: note: 'true' is defined in header '<stdbool.h>'; did you forget to '#include <stdbool.h>'?
0_0_39233356_12833.c:8:28: note: each undeclared identifier is reported only once for each function it appears in
0_0_39233356_12833.c:18:39: error: 'false' undeclared (first use in this function)
   18 |                                 first=false;
      |                                       ^~~~~
0_0_39233356_12833.c:18:39: note: 'false' is defined in header '<stdbool.h>'; did you forget to '#include <stdbool.h>'?