Take your lab2, the IntSet class. You have written correctly only the
constructor, destructor, and operator<< . Consider the following main:

#include . . .
int main() {
   IntSet a(5,3,2), b(8,5,3);
   a = b;
   cout << a << endl;
   cout << b << endl;
   return 0;
}

This program probably displays a and b correctly, but then crashes. Why?

Hint: Draw a picture! Execute the code on paper.