/in/foo.cc: In function 'int main()':
/in/foo.cc:13:18: error: 'n' was not declared in this scope
     scanf("%d", &n);
                  ^
/in/foo.cc:16:22: error: 'arr' was not declared in this scope
         scanf("%d", &arr[i]);
                      ^~~
/in/foo.cc:20:25: error: 'arr' was not declared in this scope
     int result = search(arr, n, x);
                         ^~~