/in/foo.cc: In function 'int main()':
/in/foo.cc:70:35: error: 'is_Palindrome' was not declared in this scope
   if (is_prime(i)&&is_Palindrome(i))
                                   ^
/in/foo.cc: In function 'bool is_prime(int)':
/in/foo.cc:42:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^