View Compilation Error

0_0_39087229_4888.c:13:1: error: unknown type name 'bool'
   13 | bool book[500];
      | ^~~~
0_0_39087229_4888.c:4:1: note: 'bool' is defined in header '<stdbool.h>'; did you forget to '#include <stdbool.h>'?
    3 | #include<string.h>
  +++ |+#include <stdbool.h>
    4 | 
0_0_39087229_4888.c:15:1: error: unknown type name 'bool'
   15 | bool edge[500][500];
      | ^~~~
0_0_39087229_4888.c:15:1: note: 'bool' is defined in header '<stdbool.h>'; did you forget to '#include <stdbool.h>'?