int main() {
Op* op3 = new Op(3);
Op* op4 = new Op(4);
Op* op2 = new Op(2);
Add* add = new Add(op3, op4);
Sqr* sqr = new Sqr(op2);
Sub* sub = new Sub(add, sqr);
Root* root = new Root(sub);
PrintVisitor *a = new PrintVisitor();
cout << "--- PreOrder Iteration ---" << endl;
PreOrderIterator* pre_itr = new PreOrderIterator(root);
for(pre_itr->first(); !pre_itr->is_done(); pre_itr->next()) {
pre_itr->current()->accept(a);
}
a->execute();
};
int main() {
Op* op3 = new Op(3);
Op* op4 = new Op(4);
Op* op2 = new Op(2);
Add* add = new Add(op3, op4);
Sqr* sqr = new Sqr(op2);
Sub* sub = new Sub(add, sqr);
Root* root = new Root(sub);
cout << "--- PreOrder Iteration ---" << endl;
PrintVisitor* pVis = new PrintVisitor;
PreOrderIterator* pre_itr = new PreOrderIterator(root);
for(pre_itr->first(); !pre_itr->is_done(); pre_itr->next()) {
pre_itr->current()->accept(pVis);
}
pVis->execute();
Op* op5 = new Op(5);
Op* op11 = new Op(11);
Add* add2 = new Add(op5, op11);
Sub* sub2 = new Sub(add2, sub);
Sqr* sqr2 = new Sqr(sub2);
Root* root2 = new Root(sqr2);
cout << "--- PreOrder Iteration 2---" << endl;
PrintVisitor* pVis2 = new PrintVisitor;
PreOrderIterator* pre_itr2 = new PreOrderIterator(root2);
for(pre_itr2->first(); !pre_itr2->is_done(); pre_itr2->next()) {
//pre_itr2->current()->print();
//cout << endl;
pre_itr2->current()->accept(pVis2);
}
pVis2->execute();
Root* root3 = new Root(0);
cout << "--- PreOrder Iteration 3---" << endl;
PrintVisitor* pVis3 = new PrintVisitor;
PreOrderIterator* pre_itr3 = new PreOrderIterator(root3);
for(pre_itr3->first(); !pre_itr3->is_done(); pre_itr3->next()) {
//pre_itr3->current()->print();
//cout << endl;
pre_itr3->current()->accept(pVis3);
}
pVis3->execute();
Root* root4 = new Root(op4);
cout << "--- PreOrder Iteration 2---" << endl;
PrintVisitor* pVis4 = new PrintVisitor;
PreOrderIterator* pre_itr4 = new PreOrderIterator(root4);
for(pre_itr4->first(); !pre_itr4->is_done(); pre_itr4->next()) {
//pre_itr4->current()->print();
//cout << endl;
pre_itr4->current()->accept(pVis4);
}
pVis4->execute();
};