Перемножение матриц комплексных чисел

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

namespace ConsoleApplication14
{

    class complex
    {
        int x, y;
        public complex(int _x, int _y)
        {
            x = _x;
            y = _y;
        }

        public static complex operator*(complex a, complex b)
        {
            return new complex(a.x * b.x - a.y * b.y, a.x * b.y + a.y * b.x);
        }

        public static complex operator+(complex a, complex b)
        {
            return new complex(a.x + b.x, a.y + b.y);
        }

        public override string ToString()
        {
            return String.Format("{0} : {1}", x, y);
        }
    }

    class comp_matrix
    {
        int h, w;
        complex[,] x;
        public comp_matrix(int _h, int _w)
        {
            x = new complex[_h, _w];
            h = _h;
            w = _w;
        }

        public complex this[int i, int j]
        {
            set { x[i, j] = value; }
            get { return x[i, j]; }
        }

        public int getH
        {
            set { h = value; }
            get { return h; }
        }

        public int getW
        {
            set { w = value; }
            get { return w; }
        }

        public static comp_matrix operator*(comp_matrix a, comp_matrix b)
        {
            comp_matrix d = new comp_matrix(a.getH, b.getW);
            for (int i = 0; i < a.getH; ++i)
                for (int j = 0; j < b.getW; ++j)
                {
                    d[i, j] = new complex(0, 0);
                    for (int k = 0; k < a.getW; k++)
                    {
                        d[i, j] = d[i, j] + a.x[i, k] * b.x[k, j];
                    }
                }
            return d;
        }
    }

    class Program
    {
        static void Main(string[] args)
        {
            int a, b, c;
            string s = Console.ReadLine();
            string[] f = s.Split(' ');
            a = int.Parse(f[0]);
            b = int.Parse(f[1]);
            c = int.Parse(f[2]);
            comp_matrix m1 = new comp_matrix(a, b);
            comp_matrix m2 = new comp_matrix(b, c);

            string[] d = new string[2 * b];
            for (int i = 0; i < a; i++)
            {
                s = Console.ReadLine();
                d = s.Split(' ');
                for (int j = 0; j < b; j++)
                {
                    m1[i, j] = new complex(int.Parse(d[j]), int.Parse(d[j * 2 + 1]));
                }

            }

            d = new string[2 * c];
            for (int i = 0; i < b; i++)
            {
                s = Console.ReadLine();
                d = s.Split(' ');
                for (int j = 0; j < c; j++)
                {
                    m2[i, j] = new complex(int.Parse(d[j]), int.Parse(d[j * 2 + 1]));
                }

            }


            comp_matrix ans = m1 * m2;
            Console.WriteLine("***********************************************");
            for (int i = 0; i < ans.getH; i++)
            {
                for (int j = 0; j < ans.getW; j++)
                {
                    Console.Write("{0, 10} ", ans[i, j]);
                }
                Console.WriteLine();
            }

        }
    }
}