```#include <iostream>
#include <string>
#include "RationalWithOperators.h"
using namespace std;

int main()
{
// Create and initialize two rational numbers r1 and r2.
Rational r1(4, 2);
Rational r2(2, 3);

// Test relational operators
cout << r1 << " > " << r2 << " is " <<
((r1 > r2) ? "true" : "false") << endl;
cout << r1 << " < " << r2 << " is " <<
((r1 < r2) ? "true" : "false") << endl;
cout << r1 << " == " << r2 << " is " <<
((r1 == r2) ? "true" : "false") << endl;
cout << r1 << " != " << r2 << " is " <<
((r1 != r2) ? "true" : "false") << endl;

// Test toString, add, subtract, multiply, and divide operators
cout << r1 << " + " << r2 << " = " << r1 + r2 << endl;
cout << r1 << " - " << r2 << " = " << r1 - r2 << endl;
cout << r1 << " * " << r2 << " = " << r1 * r2 << endl;
cout << r1 << " / " << r2 << " = " << r1 / r2 << endl;

// Test augmented operators
Rational r3(1, 2);
r3 += r1;
cout << "r3 is " << r3 << endl;

// Test function operator []
Rational r4(1, 2);
r4[0] = 3; r4[1] = 4;
cout << "r4 is " << r4 << endl;

// Test function operators for prefix ++ and --
r3 = r4++;
cout << "r3 is " << r3 << endl;
cout << "r4 is " << r4 << endl;

// Test function operator for conversion
cout << "1 + " << r4 << " is " << (1 + r4) << endl;

return 0;
}
```