View Compilation Error

0_0_26171473_802.cpp: In function 'int main()':
0_0_26171473_802.cpp:520:16: error: 'struct PT' has no member named 'in'
    PT tmp; tmp.in();
                ^
0_0_26171473_802.cpp:523:3: error: 'A' was not declared in this scope
   A.in(), B.in();
   ^
0_0_26171473_802.cpp:523:11: error: 'B' was not declared in this scope
   A.in(), B.in();
           ^