public static IExpression Multiply(IExpression lhe, IExpression rhe)
{
var res = lhe.Clone();
if (rhe is IVariableExpression)
{
res.Count.Multiply(rhe.Count);
if (rhe.DimensionKey.Key == res.DimensionKey.Key)
{
res.DimensionKey.Value += (Fraction)rhe.DimensionKey.Value;
if (res.DimensionKey.Value.Numerator == 0)
{
return(FromCount(res.Count));
}
return(res);
}
}
var tmp = new FlatMultExpression();
tmp.Add(res);
tmp.Add(rhe.Clone());
var r = tmp.Execute();
return(r);
}
public void Multiply_Number_FlatMult()
{
//Arrange
var expected = new FlatMultExpression();
expected.Add(new VariableExpression("u", 2));
expected.Add(new VariableExpression("y", 3));
expected.Count = new Complex(12, 0);
expected.Execute();
var c = new NumberExpression(3);
var n = new FlatMultExpression();
n.Add(new VariableExpression("u", 2));
n.Add(new VariableExpression("y", 3));
n.Count = new Complex(4, 0);
var expr = new BinaryExpression(c, OperatorTypes.Multiply, n);
//Act
var actual = expr.Execute();
//Assert
Assert.AreEqual(expected.Count.Re.ToNumber(), actual.Count.Re.ToNumber());
Assert.AreEqual(expected.Count.Im.ToNumber(), actual.Count.Im.ToNumber());
}
public static IExpression Divide(IExpression lhe, IExpression rhe)
{
var res = lhe.Clone();
if (rhe is IVariableExpression)
{
res.Count.Divide(rhe.Count);
if (rhe.DimensionKey.Key == res.DimensionKey.Key)
{
res.DimensionKey.Value -= (Fraction)rhe.DimensionKey.Value;
if (res.DimensionKey.Value.Numerator == 0)
{
return(new ComplexExpression(res.Count));
}
return(res);
}
}
else if (rhe is NumberExpression || rhe is ComplexExpression)
{
res.Count.Divide(rhe.Count);
return(res);
}
var tmp = new FlatMultExpression();
tmp.Add(res);
tmp.Add(new BinaryExpression(rhe.Clone(), OperatorTypes.Power, new NumberExpression(-1)));
var r = tmp.Execute();
return(r);
}
public static IExpression Divide(IExpression lhe, IExpression rhe)
{
var res = lhe.Clone();
if (rhe is INumberExpression)
{
res.Count.Divide(rhe.Count);
return(ReduceExpression(res));
}
else if (rhe is ComplexExpression rc)
{
res.Count.Divide(rc.Count);
return(ReduceExpression(res));
}
else
{
var tmp = new FlatMultExpression();
tmp.Add(lhe);
tmp.Add(new BinaryExpression(rhe.Clone(), OperatorTypes.Power, new NumberExpression(-1)));
var r = tmp.Execute();
return(r);
}
}
