/in/foo.c: In function 'main':
/in/foo.c:14:4: error: unknown type name 'bool'
    bool isPalindrome=true;
    ^~~~
/in/foo.c:14:22: error: 'true' undeclared (first use in this function)
    bool isPalindrome=true;
                      ^~~~
/in/foo.c:14:22: note: each undeclared identifier is reported only once for each function it appears in
/in/foo.c:19:17: error: 'false' undeclared (first use in this function)
    isPalindrome=false;
                 ^~~~~