用C#写的杨辉三角算法

C#交错数组(jag array)实现的杨辉三角算法

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        static void YHTriangle(int LineNums)
        {
            int N = LineNums;
            if (0 >= N)
            {
                Console.WriteLine("You must input a positive interger!");
                return;
            }
               
            int[][] myArray = new int[N][];  //定义一个交错数组

 

            //给第一行赋值
            myArray[0] = new int[1];
            myArray[0][0] = 1;

 

            //给第2--n行赋值
            for (int i = 1; i < N; i++)
            {
                myArray[i] = new int[i + 1];
                myArray[i][0] = 1;
                myArray[i][i] = 1;

                for (int j = 1; j < i; j++)
                {

                    myArray[i][j] = myArray[i - 1][j - 1] + myArray[i - 1][j];

                }

            }

            for (int i = 0; i < N; i++)
            {
                //在每行开始输出n-i-1个空格
                string space = string.Empty;
                for (int k = 0; k < n - i; k++)
                    space += " ";
                Console.Write("{0}",space);

                //输出每一行的数字
                for (int j = 0; j<=i; j++)
                {
                    Console.Write("{0}  ", myArray[i][j]);

                }
                Console.WriteLine();
            }
            Console.ReadLine();
           
        }