public static void Main(string[] args)
{
Rational[] num_array = new Rational[3];
try {
Rational left = new Rational ();
Rational right = new Rational ();
Calculate (left, right, "+");
Calculate (left, right, "-");
Calculate (left, right, "*");
Calculate (left, right, "/");
Calculate (left, right, "==");
Calculate (left, right, "!=");
Calculate (left, right, ">");
Calculate (left, right, "<");
}
catch (RationalException e) {
Console.WriteLine ("Rational exception handled: {0}, {1}", e.GetType (), e.Message);
}
try {
Console.WriteLine ("Please enter some nums to sort: ");
for (int i = 0; i < num_array.Length; i++)
num_array [i] = new Rational ();
Array.Sort (num_array, new Comparison<Rational> ((r1, r2) => r2.CompareTo (r1)));
Console.WriteLine ("The entered rationals in ascending order: ");
foreach (Rational r in num_array)
Console.WriteLine ("{0}", r.ToString());
} catch (RationalException e) {
Console.WriteLine ("Rational exception handled: {0}, {1}", e.GetType (), e.Message);
}
}
public static void Calculate(Rational r1, Rational r2, string op)
{
try {
if (op.Contains ("+")) {
Console.WriteLine("{0} + {1} = {2}",r1, r2, (r1 + r2));
}
else if (op.Contains ("-")) {
Console.WriteLine("{0} - {1} = {2}",r1, r2, (r1 - r2));
}
else if (op.Contains ("*")) {
Console.WriteLine("{0} * {1} = {2}",r1, r2, (r1 * r2));
}
else if (op.Contains ("/")) {
Console.WriteLine("{0} / {1} = {2}",r1, r2, (r1 / r2));
}
else if (op.Contains ("==")) {
if (r1.Equals(r2)) {
Console.WriteLine("{0} equals {1}", r1, r2);
}
else
Console.WriteLine("{0} not equals {1}", r1, r2);
}
else if (op.Contains ("!=")) {
if (!r1.Equals(r2))
Console.WriteLine("{0} not equals {1}", r1, r2);
else
Console.WriteLine("{0} equals {1}", r1, r2);
}
else if (op.Contains ("<")) {
if (r1.CompareTo(r2) == -1)
Console.WriteLine("True");
else
Console.WriteLine("False");
}
else if (op.Contains (">")) {
if (r1.CompareTo(r2) == 1)
Console.WriteLine("True");
else
Console.WriteLine("False");
}
else
throw new RationalException("Invalid Operation");
}
catch (RationalException ex)
{
throw ex;
}
}
