int runMenu(Polynomial& lhs, Polynomial& rhs, Polynomial& ans) {
//prompt
cout << "How would you like to add Polynomials?" << endl
<< " 1. Do the whole shebang!" << endl
<< " 2. Enter first Polynomial." << endl
<< " 3. Enter second Polynomial." << endl
<< " 4. View current Polynomials." << endl
<< " 5. Compute!" << endl
<< " 6. Quit." << endl
<< ": ";
string input;
bool error = false;
cin >> input;
switch (strtol(input.c_str(),NULL,10)) { //protects from cin >> int not getting an int and throwing a tantrum
case 1: //enter two polynomials, compute, and view, without going back to the menu
error = inputPoly(lhs);
if (error) break;
error = inputPoly(rhs);
if (error) break;
ans = lhs + rhs;
lhs.reduce();
rhs.reduce();
cout << "\n\n" << lhs.toString() << endl
<< "+\n" << rhs.toString() << endl
<< "=\n" << ans.toString() << endl << endl;
break;
case 2: //input left operand
error = inputPoly(lhs);
lhs.reduce();
break;
case 3: //input right operand
error = inputPoly(rhs);
rhs.reduce();
break;
case 4: //view stored polynomials without adding
cout << lhs.toString() << endl << endl
<< rhs.toString() << endl << endl
<< ans.toString() << endl << endl;
break;
case 5: //add two polynomials and display the resulting equation
ans = lhs + rhs;
cout << "\n\n" << lhs.toString() << endl
<< "+\n" << rhs.toString() << endl
<< "=\n" << ans.toString() << endl << endl;
break;
case 6: //end program
cout << "See ya!" << endl; //only viewable if your terminal doesn't automatically close
return 0;
break;
default: //unexpected input
cout << "Invalid selection" << endl;
}
if (error) cout << "\nError parsing string!" << endl;
return 1;
}
Polynomial operator+(const Polynomial& p1, const Polynomial& p2)
{
Polynomial p;
p._degree = std::max(p1._degree, p2._degree);
p._terms = Polynomial::TermList(p1._terms.size() + p2._terms.size());
merge(p1._terms.begin(), p1._terms.end(), p2._terms.begin(), p2._terms.end(), p._terms.begin());
p.reduce();
return p;
}