/in/call.cpp:13:22: error: cannot initialize a parameter of type 'Call **' with an lvalue of type 'Call *'
    queue.insertBack(newCall);
                     ^~~~~~~
/in/Compile/dlist.h:25:24: note: passing argument to parameter 'op' here
    void insertBack(T *op);
                       ^
/in/call.cpp:38:9: error: use of undeclared identifier 'allQueuesEmpty'
while (!allQueuesEmpty() || isAgentBusy) {
        ^
/in/call.cpp:41:13: error: use of undeclared identifier 'handleCall'
            handleCall(platinumQueue, currentTime, timeWhenFree, isAgentBusy);
            ^
/in/call.cpp:43:13: error: use of undeclared identifier 'handleCall'
            handleCall(goldQueue, currentTime, timeWhenFree, isAgentBusy);
            ^
/in/call.cpp:45:13: error: use of undeclared identifier 'handleCall'
            handleCall(silverQueue, currentTime, timeWhenFree, isAgentBusy);
            ^
/in/call.cpp:47:13: error: use of undeclared identifier 'handleCall'
            handleCall(regularQueue, currentTime, timeWhenFree, isAgentBusy);
            ^
/in/call.cpp:58:11: error: cannot initialize a variable of type 'Call *' with an rvalue of type 'Call **'
    Call* call = queue.removeFront();
          ^      ~~~~~~~~~~~~~~~~~~~
/in/call.cpp:59:5: error: use of undeclared identifier 'cout'; did you mean 'std::cout'?
    cout << "Answering call from " << call->name << endl;
    ^~~~
    std::cout
/usr/bin/../lib/gcc/x86_64-linux-gnu/7.5.0/../../../../include/c++/7.5.0/iostream:61:18: note: 'std::cout' declared here
  extern ostream cout;          /// Linked to standard output
                 ^
/in/call.cpp:59:53: error: use of undeclared identifier 'endl'; did you mean 'std::endl'?
    cout << "Answering call from " << call->name << endl;
                                                    ^~~~
                                                    std::endl
/usr/bin/../lib/gcc/x86_64-linux-gnu/7.5.0/../../../../include/c++/7.5.0/ostream:590:5: note: 'std::endl' declared here
    endl(basic_ostream<_CharT, _Traits>& __os)
    ^
9 errors generated.
/in/Compile/Makefile:39: recipe for target 'buildCall' failed
make: *** [buildCall] Error 1