macierze

using System;
namespace Trojmian
{
        public static class macierz
        {
            private static string str;
            public static string macierz1(int r)
            {
                str="";
                int[ , ] tab=new int[r, r];
                for (int i=0;i<r;i++)
                    for (int j=0;j<r;j++)
                        if (j==i)   tab[i, j]=1;
                        else tab[i, j]=0;

                for (int i=0;i<r;i++)
                {
                    for (int j=0;j<r;j++)
                    str+=tab[ i, j]+"   ";

                    str+="\n";
                }
                return str;
            }
            public static string macierz2(int r)
            {
                str="";
                int[ , ] tab=new int[r, r];
                for (int i=0;i<r;i++)
                {
                    for (int j=0;j<r;j++)
                    {
                    tab[i, j] = (j-i > 0 ? j-i:i-j) +1;
                    str+=tab[i, j]+" ";
                    }
                    str+="\n";
                }
                return str;
            }
        }
}