can someone tell me what am i doing wrong in overloading this operator

Question

I am supposed to overload the += operator. It is supposed to insert a new Automobile object into the dynamic array cars.But the code keeps crashing. I overloaded the = operator and that part works just fine.(line 7)

RentACar &operator+=(const Automobile &a1)
{
Automobile *tmp;
tmp=new Automobile[num+1];
for(int i=0;i<num;i++)
{
tmp[i]=cars[i];
}
tmp[num]=a1;
delete [] cars;
cars=tmp;
num++;
return *this;
}

Answer 1

I don't necessarily see anything wrong with the operator, it looks just fine. I also checked with a dummy code containing minimal definitions for "Automobile" and "RentACar", which worked as well without errors. So unless I am missing something, I don't think whatever makes your code crash is due to this operator definition. Is it possible for you to link the entire code here?

Answer 2

Thanks. I found the mistake. It was in the constructor for the Automobile class.