/// <summary>
/// add fractions
/// </summary>
/// <param name="f1">fraction</param>
/// <param name="f2">fraction to be added</param>
/// <returns>resulting fraction</returns>
public static fraction operator + (fraction f1, fraction f2)
{
fraction frac = new fraction();
if ((f1.numerator != 0) && (f2.numerator != 0))
{
frac.numerator = (f1.numerator * f2.denominator) + (f2.numerator * f1.denominator);
frac.denominator = f2.denominator * f1.denominator;
}
else
{
if (f1.numerator == 0)
{
frac.numerator = f2.numerator;
frac.denominator = f2.denominator;
}
else
{
frac.numerator = f1.numerator;
frac.denominator = f1.denominator;
}
}
if ((frac.denominator < 0) && (frac.numerator >= 0))
{
frac.numerator = -frac.numerator;
frac.denominator = -frac.denominator;
}
return(frac);
}
public void Divide()
{
fraction f1 = new fraction(4,5);
fraction f2 = new fraction(3,2);
fraction result = f1 / f2;
Assert.AreEqual(8, result.numerator);
Assert.AreEqual(15, result.denominator);
}
public void Multiply()
{
fraction f1 = new fraction(4,5);
fraction f2 = new fraction(7,3);
fraction result = f1 * f2;
Assert.AreEqual(4*7, result.numerator);
Assert.AreEqual(5*3, result.denominator);
}
public void Add()
{
fraction f1 = new fraction(4,5);
fraction f2 = new fraction(3,5);
fraction result = f1 + f2;
result.Reduce();
Assert.AreEqual(7, result.numerator);
Assert.AreEqual(5, result.denominator);
}
public void Subtract2()
{
fraction f1 = new fraction(-2000,2000);
fraction f2 = new fraction(-49,45);
fraction result = f1 - f2;
result.Reduce();
Console.WriteLine("numerator " + result.numerator.ToString());
Console.WriteLine("denominator " + result.denominator.ToString());
Assert.AreEqual(4, result.numerator);
Assert.AreEqual(45, result.denominator);
}
public void SubtractFromZero2()
{
fraction f1 = new fraction(0,2000);
fraction f2 = new fraction(7,86);
fraction result = f1 - f2;
result.Reduce();
Console.WriteLine("numerator " + result.numerator.ToString());
Console.WriteLine("denominator " + result.denominator.ToString());
Assert.AreEqual(-7, result.numerator);
Assert.AreEqual(86, result.denominator);
}
public void SubtractFromZero()
{
fraction f1 = new fraction(3,109);
fraction f2 = new fraction(8,109);
fraction result = f1 - f2;
result.Reduce();
Console.WriteLine("numerator " + result.numerator.ToString());
Console.WriteLine("denominator " + result.denominator.ToString());
Assert.AreEqual(-5, result.numerator);
Assert.AreEqual(109, result.denominator);
}
/// <summary>
/// divide fractions
/// </summary>
/// <param name="f1">fraction</param>
/// <param name="f2">fraction to be divided by</param>
/// <returns>resulting fraction</returns>
public static fraction operator /(fraction f1, fraction f2)
{
fraction frac = new fraction();
frac.numerator = f1.numerator * f2.denominator;
frac.denominator = f1.denominator * f2.numerator;
if(frac.denominator < 0)
{
frac.numerator *= -1;
frac.denominator *= -1;
}
if ((frac.denominator < 0) && (frac.numerator >= 0))
{
frac.numerator = -frac.numerator;
frac.denominator = -frac.denominator;
}
return(frac);
}
public void AddToZero()
{
fraction f1 = new fraction(0,2000);
fraction f2 = new fraction(-8,109);
fraction result = f1 + f2;
result.Reduce();
Console.WriteLine("numerator " + result.numerator.ToString());
Console.WriteLine("denominator " + result.denominator.ToString());
Assert.AreEqual(-8, result.numerator);
Assert.AreEqual(109, result.denominator);
}