//Test, um neue Rundungsfunktion gegen proprietäre zu testen.
public static void RundungTest()
{
Random randObj = new Random();
while (true)
{
int zaehler = randObj.Next(-1000, 1000);
int nenner = randObj.Next(-1000, 1000);
if (nenner == 0)
{
nenner = 1;
}
Fraction bruch = new Fraction(zaehler, nenner);
double istRundung = Runde(bruch.ToDouble(), 2);
double sollRundung = TRunde(bruch.ToDouble(), 2);
Console.Write(bruch.ToString() + " (" + bruch.ToDouble() + "): " + istRundung + " vs " + sollRundung + " –– ");
//if (istRundung == sollRundung)
if (Math.Round(istRundung, 10) == Math.Round(sollRundung, 10))
{
Console.WriteLine("OK");
}
else
{
Console.WriteLine("FAIL:");
Console.WriteLine("Ist: " + new Fraction(istRundung).ToString());
Console.WriteLine("Soll: " + new Fraction(sollRundung).ToString());
Console.WriteLine("");
}
}
}
static void Main(string[] args)
{
Fraction frac=new Fraction(); // we'll get NaN
AssertEqual(frac, Fraction.NaN);
AssertEqual(frac.ToString() , NumberFormatInfo.CurrentInfo.NaNSymbol);
frac = new Fraction(1,5); // we'll get 1/5
AssertEqual(frac.ToString() , "1/5");
frac=new Fraction(25); // we'll get 25
AssertEqual(frac.ToString() , "25");
frac=new Fraction(0.0); // we'll get 0
AssertEqual(frac.ToString() , "0");
frac=new Fraction(0.25); // we'll get 1/4
AssertEqual(frac.ToString() , "1/4");
frac=new Fraction(9.25); // we'll get 37/4
AssertEqual(frac.ToString() , "37/4");
frac=new Fraction(long.MaxValue, 1);
string compareTo = string.Format("{0}", long.MaxValue);
AssertEqual(frac.ToString() , compareTo);
frac=new Fraction(1, long.MaxValue);
compareTo = string.Format("1/{0}", long.MaxValue);
AssertEqual(frac.ToString() , compareTo);
frac=new Fraction(long.MaxValue, long.MaxValue);
AssertEqual(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);
AssertEqual(frac.ToString() , compareTo);
frac=new Fraction(1, long.MinValue + 1);
compareTo = string.Format("-1/{0}", Math.Abs(long.MinValue + 1));
AssertEqual(frac.ToString() , compareTo);
frac=new Fraction(long.MinValue + 1, long.MinValue + 1);
AssertEqual(frac.ToString(), "1");
frac=new Fraction(long.MaxValue, long.MinValue + 1);
AssertEqual(frac.ToString(), "-1");
frac=new Fraction(long.MinValue + 1, long.MaxValue);
AssertEqual(frac.ToString(), "-1");
frac=new Fraction(0.025); // we'll get 1/40
AssertEqual(frac.ToString() , "1/40");
frac=new Fraction(1 / 2.0); // we'll get 1/2
AssertEqual(frac.ToString() , "1/2");
frac=new Fraction(1 / 3.0); // we'll get 1/3
AssertEqual(frac.ToString() , "1/3");
frac=new Fraction(1 / 4.0); // we'll get 1/4
AssertEqual(frac.ToString() , "1/4");
frac=new Fraction(1 / 5.0); // we'll get 1/5
AssertEqual(frac.ToString() , "1/5");
frac=new Fraction(1 / 6.0); // we'll get 1/6
AssertEqual(frac.ToString() , "1/6");
frac=new Fraction(1 / 7.0); // we'll get 1/7
AssertEqual(frac.ToString() , "1/7");
frac=new Fraction(1 / 8.0); // we'll get 1/8
AssertEqual(frac.ToString() , "1/8");
frac=new Fraction(1 / 9.0); // we'll get 1/9
AssertEqual(frac.ToString() , "1/9");
frac=new Fraction(1 / 10.0); // we'll get 1/10
AssertEqual(frac.ToString() , "1/10");
frac=new Fraction(1 / 49.0); // we'll get 1/49
AssertEqual(frac.ToString() , "1/49");
frac=new Fraction(6);
AssertEqual(frac.ToString() , "6");
Fraction divisor = new Fraction(4);
AssertEqual(divisor.ToString() , "4");
frac %= divisor;
AssertEqual(frac.ToString(), "2");
frac=new Fraction(9,4);
AssertEqual(frac.ToString() , "9/4");
divisor = new Fraction(2);
AssertEqual(divisor.ToString() , "2");
frac %= divisor;
AssertEqual(frac.ToString() , "1/4");
frac=new Fraction(5,12);
AssertEqual(frac.ToString() , "5/12");
divisor = new Fraction(1,4);
AssertEqual(divisor.ToString() , "1/4");
frac %= divisor;
AssertEqual(frac.ToString() , "1/6");
frac=new Fraction(1.0); // we'll get 1
AssertEqual(frac.ToString() , "1");
frac=new Fraction(2.0); // we'll get 2
AssertEqual(frac.ToString() , "2");
frac=new Fraction(-2.0); // we'll get -2
AssertEqual(frac.ToString() , "-2");
frac=new Fraction(-1.0); // we'll get -1
AssertEqual(frac.ToString() , "-1");
frac=new Fraction(0.5); // we'll get 1/2
AssertEqual(frac.ToString() , "1/2");
frac=new Fraction(1.5); // we'll get 3/2
AssertEqual(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);
AssertEqual(frac1, frac2);
}
}
Console.WriteLine();
frac=new Fraction("6.25"); // we'll get 25/4
AssertEqual(frac.ToString() , "25/4");
frac = 0;
AssertEqual(frac.ToString(), "0");
frac = 1;
AssertEqual(frac.ToString(), "1");
frac /= new Fraction(0);
AssertEqual(frac, Fraction.PositiveInfinity);
AssertEqual(frac.ToString(), NumberFormatInfo.CurrentInfo.PositiveInfinitySymbol);
frac = -1;
AssertEqual(frac.ToString(), "-1");
frac /= new Fraction(0);
AssertEqual(frac, Fraction.NegativeInfinity);
AssertEqual(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
AssertEqual(frac.ToString() , "1/2");
Console.WriteLine( frac+2.5 ); // will display 3
AssertEqual((frac + 2.5).ToString() , "3");
frac="1/2"; // implicit cast from string to
AssertEqual(frac.ToString() , "1/2");
frac="22.5"; // implicit cast from string to fraction
AssertEqual(frac.ToString() , "45/2");
frac=10.25; // implicit cast from double to fraction
AssertEqual(frac.ToString() , "41/4");
frac=15; // implicit cast from integer/long to fraction
AssertEqual(frac.ToString() , "15");
frac = 0.5; // initialize frac=1/2
AssertEqual(frac.ToString() , "1/2");
Console.WriteLine( frac - 0.25 ); // Yes, you are right. "1/4" is displayed
AssertEqual((frac - 0.25).ToString(), "1/4");
Console.WriteLine(frac + "1/4");
AssertEqual((frac + "1/4").ToString(), "3/4");
if (frac.Equals(0.5))
Console.WriteLine("seems that frac == 0.5");
frac += 0.5;
AssertEqual(frac.ToString(), "1");
if (frac.Equals(1))
Console.WriteLine("seems that now frac == 1");
frac = double.NaN;
Console.WriteLine(frac.ToString());
AssertEqual(frac.ToString(), NumberFormatInfo.CurrentInfo.NaNSymbol);
frac = double.PositiveInfinity;
Console.WriteLine(frac.ToString());
AssertEqual(frac.ToString(), NumberFormatInfo.CurrentInfo.PositiveInfinitySymbol);
frac = double.NegativeInfinity;
Console.WriteLine(frac.ToString());
AssertEqual(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();
}