public void Main()
{
Fraction frac = new Fraction(); // we'll get NaN
Assert.AreEqual(frac, Fraction.NaN);
Assert.AreEqual(frac.ToString(), NumberFormatInfo.CurrentInfo.NaNSymbol);
frac = new Fraction(1, 5); // we'll get 1/5
Assert.AreEqual(frac.ToString(), "1/5");
frac = new Fraction(25); // we'll get 25
Assert.AreEqual(frac.ToString(), "25");
frac = new Fraction(0.0); // we'll get 0
Assert.AreEqual(frac.ToString(), "0");
frac = new Fraction(0.25); // we'll get 1/4
Assert.AreEqual(frac.ToString(), "1/4");
frac = new Fraction(9.25); // we'll get 37/4
Assert.AreEqual(frac.ToString(), "37/4");
frac = new Fraction(long.MaxValue, 1);
string compareTo = string.Format("{0}", long.MaxValue);
Assert.AreEqual(frac.ToString(), compareTo);
frac = new Fraction(1, long.MaxValue);
compareTo = string.Format("1/{0}", long.MaxValue);
Assert.AreEqual(frac.ToString(), compareTo);
frac = new Fraction(long.MaxValue, long.MaxValue);
Assert.AreEqual(frac.ToString(), "1");
// the plus-one issue is because of twos-complement representing one more negtive value than
// positive
frac = new Fraction(long.MinValue + 1, 1);
compareTo = string.Format("{0}", long.MinValue + 1);
Assert.AreEqual(frac.ToString(), compareTo);
frac = new Fraction(1, long.MinValue + 1);
compareTo = string.Format("-1/{0}", Math.Abs(long.MinValue + 1));
Assert.AreEqual(frac.ToString(), compareTo);
frac = new Fraction(long.MinValue + 1, long.MinValue + 1);
Assert.AreEqual(frac.ToString(), "1");
frac = new Fraction(long.MaxValue, long.MinValue + 1);
Assert.AreEqual(frac.ToString(), "-1");
frac = new Fraction(long.MinValue + 1, long.MaxValue);
Assert.AreEqual(frac.ToString(), "-1");
frac = new Fraction(0.025); // we'll get 1/40
Assert.AreEqual(frac.ToString(), "1/40");
frac = new Fraction(1 / 2.0); // we'll get 1/2
Assert.AreEqual(frac.ToString(), "1/2");
frac = new Fraction(1 / 3.0); // we'll get 1/3
Assert.AreEqual(frac.ToString(), "1/3");
frac = new Fraction(1 / 4.0); // we'll get 1/4
Assert.AreEqual(frac.ToString(), "1/4");
frac = new Fraction(1 / 5.0); // we'll get 1/5
Assert.AreEqual(frac.ToString(), "1/5");
frac = new Fraction(1 / 6.0); // we'll get 1/6
Assert.AreEqual(frac.ToString(), "1/6");
frac = new Fraction(1 / 7.0); // we'll get 1/7
Assert.AreEqual(frac.ToString(), "1/7");
frac = new Fraction(1 / 8.0); // we'll get 1/8
Assert.AreEqual(frac.ToString(), "1/8");
frac = new Fraction(1 / 9.0); // we'll get 1/9
Assert.AreEqual(frac.ToString(), "1/9");
frac = new Fraction(1 / 10.0); // we'll get 1/10
Assert.AreEqual(frac.ToString(), "1/10");
frac = new Fraction(1 / 49.0); // we'll get 1/49
Assert.AreEqual(frac.ToString(), "1/49");
frac = new Fraction(6);
Assert.AreEqual(frac.ToString(), "6");
Fraction divisor = new Fraction(4);
Assert.AreEqual(divisor.ToString(), "4");
frac %= divisor;
Assert.AreEqual(frac.ToString(), "2");
frac = new Fraction(9, 4);
Assert.AreEqual(frac.ToString(), "9/4");
divisor = new Fraction(2);
Assert.AreEqual(divisor.ToString(), "2");
frac %= divisor;
Assert.AreEqual(frac.ToString(), "1/4");
frac = new Fraction(5, 12);
Assert.AreEqual(frac.ToString(), "5/12");
divisor = new Fraction(1, 4);
Assert.AreEqual(divisor.ToString(), "1/4");
frac %= divisor;
Assert.AreEqual(frac.ToString(), "1/6");
frac = new Fraction(1.0); // we'll get 1
Assert.AreEqual(frac.ToString(), "1");
frac = new Fraction(2.0); // we'll get 2
Assert.AreEqual(frac.ToString(), "2");
frac = new Fraction(-2.0); // we'll get -2
Assert.AreEqual(frac.ToString(), "-2");
frac = new Fraction(-1.0); // we'll get -1
Assert.AreEqual(frac.ToString(), "-1");
frac = new Fraction(0.5); // we'll get 1/2
Assert.AreEqual(frac.ToString(), "1/2");
frac = new Fraction(1.5); // we'll get 3/2
Assert.AreEqual(frac.ToString(), "3/2");
Console.WriteLine("Doing the loop check");
for (int numerator = -100; numerator < 100; numerator++)
{
Console.Write("{0} ", numerator);
for (int denominator = -100; denominator < 100; denominator++)
{
Fraction frac1 = new Fraction(numerator, denominator);
double dbl = (double)numerator / (double)denominator;
Fraction frac2 = new Fraction(dbl);
Assert.AreEqual(frac1, frac2);
}
}
Console.WriteLine();
frac = new Fraction("6.25"); // we'll get 25/4
Assert.AreEqual(frac.ToString(), "25/4");
frac = 0;
Assert.AreEqual(frac.ToString(), "0");
frac = 1;
Assert.AreEqual(frac.ToString(), "1");
frac /= new Fraction(0);
Assert.AreEqual(frac, Fraction.PositiveInfinity);
Assert.AreEqual(frac.ToString(), NumberFormatInfo.CurrentInfo.PositiveInfinitySymbol);
frac = -1;
Assert.AreEqual(frac.ToString(), "-1");
frac /= new Fraction(0);
Assert.AreEqual(frac, Fraction.NegativeInfinity);
Assert.AreEqual(frac.ToString(), NumberFormatInfo.CurrentInfo.NegativeInfinitySymbol);
// we can enter anything like "213" or
// "23/3" or "4.27"
Console.Write("Enter a Fraction: ");
frac = new Fraction(System.Console.ReadLine());
Console.WriteLine(frac); // displays the current value of frac object;
frac = new Fraction("1/2"); // initialize a fraction with 1/2
Assert.AreEqual(frac.ToString(), "1/2");
Console.WriteLine(frac + 2.5); // will display 3
Assert.AreEqual((frac + 2.5).ToString(), "3");
frac = "1/2"; // implicit cast from string to
Assert.AreEqual(frac.ToString(), "1/2");
frac = "22.5"; // implicit cast from string to fraction
Assert.AreEqual(frac.ToString(), "45/2");
frac = 10.25; // implicit cast from double to fraction
Assert.AreEqual(frac.ToString(), "41/4");
frac = 15; // implicit cast from integer/long to fraction
Assert.AreEqual(frac.ToString(), "15");
frac = 0.5; // initialize frac=1/2
Assert.AreEqual(frac.ToString(), "1/2");
Console.WriteLine(frac - 0.25); // Yes, you are right. "1/4" is displayed
Assert.AreEqual((frac - 0.25).ToString(), "1/4");
Console.WriteLine(frac + "1/4");
Assert.AreEqual((frac + "1/4").ToString(), "3/4");
if (frac.Equals(0.5))
Console.WriteLine("seems that frac == 0.5");
frac += 0.5;
Assert.AreEqual(frac.ToString(), "1");
if (frac.Equals(1))
Console.WriteLine("seems that now frac == 1");
frac = double.NaN;
Console.WriteLine(frac.ToString());
Assert.AreEqual(frac.ToString(), NumberFormatInfo.CurrentInfo.NaNSymbol);
frac = double.PositiveInfinity;
Console.WriteLine(frac.ToString());
Assert.AreEqual(frac.ToString(), NumberFormatInfo.CurrentInfo.PositiveInfinitySymbol);
frac = double.NegativeInfinity;
Console.WriteLine(frac.ToString());
Assert.AreEqual(frac.ToString(), NumberFormatInfo.CurrentInfo.NegativeInfinitySymbol);
frac = "33";
frac += "1/3";
Console.WriteLine(frac.ToString());
frac *= 3;
Console.WriteLine(frac.ToString());
Console.Write("Any key to quit");
Console.ReadLine();
}
