View Compilation Error

0_0_25884427_15857.cpp: In function 'int main()':
0_0_25884427_15857.cpp:17:23: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
   for(int i = 1; i <= q; i++){
                       ^
0_0_25884427_15857.cpp:33:32: error: invalid use of member (did you forget the '&' ?)
       printf("%d\n", q[u].front);
                                ^
0_0_25884427_15857.cpp:37:31: error: invalid use of member (did you forget the '&' ?)
       printf("%d\n", q[u].back);
                               ^