CODEWITHSUNDEEP
c#complex-numbers
jon thie
jon thie

Reputation: 45

What is the C# data type that allows complex and imaginary numbers?

I am creating a C# project which takes two user inputs of complex numbers and completes a mathematical operation on them. The problem I am running into is how to parse i as the square root of -1.

double operandA = 0;
double operandB = 0;
double result = 0;
string textA, textB;
string error = "The value you entered is invalid, try again";

private void plus_Btn_Click(object sender, EventArgs e)
{
    result = operandA + operandB;
}

private void Subtract_btn_Click(object sender, EventArgs e)
{
    result = operandA - operandB;
}

private void mult_Btn_Click(object sender, EventArgs e)
{
    result = operandA * operandB;
}

private void divide_Btn_Click(object sender, EventArgs e)
{
    result = operandA / operandB;
}

private void textBox2_Leave(object sender, EventArgs e)
{
    textB = textBox2.Text;
    if (double.TryParse(textB, out operandB))
        operandB = double.Parse(textB);
    else
    {
        MessageBox.Show(error);
        textBox2.Select();
    }
}

private void textBox1_Leave(object sender, EventArgs e)
{
    textA = textBox1.Text;
    if (double.TryParse(textA, out operandA))
        operandA = double.Parse(textA);
    else
    {
        MessageBox.Show(error);
        textBox1.Select();
    }
}

It works fine on regular numbers, decimals, and negative numbers, but I can't figure out how to do the value of i that I need. Can anyone help? It has been suggested that I use System.Numeric.Complex, but whenever I try to do this using "Using System.Numerics.Complex" or simply "Using System.Numerics", it says this type/namespace does not exist inside 'System'.

Upvotes: 1

Views: 1376

Answers (2)

Titian Cernicova-Dragomir
Titian Cernicova-Dragomir

Reputation: 249536

If you want to support operations on complex numbers, you should consider using System.Numerics.Complex

Complex c = Complex.Sqrt(-1);
Console.WriteLine(c + 1);

For documentation on this type see here

Upvotes: 7

Sasha Alperovich
Sasha Alperovich

Reputation: 382

You can use Complex in System.Numerics

https://msdn.microsoft.com/en-us/library/system.numerics.complex(v=vs.110).aspx

Upvotes: 2

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