this doesnt compile and i dont know the error in this.please cooperate since i am a beginner

template<class Type> Type ArrayPQ<Type>::removeMin(void ) throw(exception) 
{
    if (isEmpty())
    {
        cout << "Empty Priority Queue\n";
    }
    else
    {
        Type min = array[0];
        array[0] = array[heap];
        heap--;
        minHeapify(0);
        return min;
    }
}

I keep getting this warning:

In file included from runtime_analysis.cpp:7: ./PQ3.h:57:1: warning: control may reach end of non-void function [-Wreturn-type] } ^ ./PQ3.h:114:9: note: in instantiation of member function 'ArrayPQ::removeMin' requested here removeMin(); ^ runtime_analysis.cpp:67:12: note: in instantiation of member function 'ArrayPQ::DeleteAll' requested here ArrPQ->DeleteAll(); ^ 1 warning generated.

And whenever I run the code I get an error...