In Lec 12-1, we practiced the Fraction class with friend functions. The function calls are already much better like add(ans, num). We want to further increase the readability of main(). We want to apply operator overloading so that expressions like num1 + num2 will work. There are two ways to do that. We can either overload the arithmetic operators either as member functions or friend functions. In this project, we are to overload them as friend functions. In Lab 12-3, you are to practice the other one.
Re-write add(), sub(), mul(), and div() as operators using friend functions in in the class definition (in "fraction.h")
Implement these operators in "fraction.cpp". Note that they are friend functions, so they ** do not belong to the Fraction class**. The class name and the scope resolution operator Fraction:: are not necessary.
Main function is given. DO NOT CHANGE MAIN, otherwise your work will not be regarded as correct even if you pass all test cases. You may get PENALTY POINTS for changing main().
You can use all other member functions from Lab 11. Submit everything including main().
// DO NOT CHANGE main() !!!
int main() {
Fraction num1, num2, ans;
char oper;
num1.input();
cin >> oper;
num2.input();
switch (oper) {
case '+':
ans = num1 + num2; break;
case '-':
ans = num1 - num2; break;
case '*':
ans = num1 * num2; break;
case '/':
ans = num1 / num2; break;
}
// display result
cout << '(';
num1.display();
cout << ") " << oper << " (";
num2.display();
cout << ") = ";
ans.display();
cout << endl;
return 0;
}