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C# random complex number for (real, imaginary number) between 100 , 200?

Here is my code in C# , but it generate same number for specific amount number like this:
180 + 152 i
180 + 152 i
180 + 152 i
180 + 152 i
180 + 152 i

any idea?

Code:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ex2
{
class Complex
{
public double real, imag;
public void Set()
{

        Random r = new Random();
        imag = r.Next(100,200);
        real = r.Next(100,200);

    }

    public void Write()
    {
        char sign;
        sign = (imag > 0) ? '+' : '-';
        Console.WriteLine("{0} {1} {2} i ", real, sign, Math.Abs(imag));
    }

}
class Program
{
    private static int n;
    static void Main(string[] args)
    {
        Console.Write("How Many Number : ");
        n = Convert.ToInt32(Console.ReadLine());

        Complex[] complexArray = new Complex[n];
        Random r = new Random();


        for (int i= 0; i < n; ++i)
        {
            complexArray[i] = new Complex();
        }


        for (int i = 0; i < n; ++i)
        {
            complexArray[i].Set();
            complexArray[i].Write();
        }

        realSort(complexArray);

        Console.WriteLine();

        for (int i = 0; i < n; ++i)
            complexArray[i].Write();

        Console.ReadKey();
    }

    public static void realSort(Complex[] s)
    {
        Complex temp;
        for (int i = 1; i <= s.Length - 1; ++i)
            for (int j = 0; j < s.Length - i; ++j)
                if (s[j].real > s[j + 1].real)
                {
                    temp = s[j];
                    s[j] = s[j + 1];
                    s[j + 1] = temp;
                }
    }
}

}

Tagged:

Comments

  • WiserWiser IsraelMember Posts: 6
    edited November 2015

    Hey,

    What you want to do is change the

    public void set()

    To:
    public void Set(Random r)

    And when you call it use:

    complexArray[i].Set(r);

    And of course in public void Set(Random r)
    lose the Random r = new Random();

    That's it, it works!

    Explanation:

    Each time you use "new Random()" it resets, that why when you create more than one random number, you should keep the Random instance and reuse it.

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