关于闲的没事用C#输出99乘法表这件事

运行结果感兴趣的话可以自己跑一下哦（因为懒所以省略头文件之类的了）

1

            int i,j;
            for (i = 1; i <= 9; i++) 
            {
                for (j = 1; j <= i; j++) 
                {
                    Console.Write(j +"*" +i +"=" +i*j +"\t");
                }
                Console.WriteLine();
            }

2

            int i,j;
            for (i = 1; i <= 9; i++)
            {
                for (j = 1; j <= 9; j++)
                {
                    Console.Write(j + "*" + i + "=" + i * j + "\t");
                }
                Console.WriteLine();
            }

3

            int i,j;
            for (i = 9; i > 0; i--) 
            {
                for (j = 9; j >= i; j--) 
                {
                    Console.Write(j + "*" + i + "=" + i * j + "\t");
                }
                Console.WriteLine();
            }

4

            int i,j;
            for (i = 9; i > 0; i--)
            {
                for (j = 1; j <= i; j++)
                {
                    Console.Write(j + "*" + i + "=" + i * j + "\t");
                }
                Console.WriteLine();
            }

5

            int i,j;
            for (i = 1; i <=9; i++)
            {
                for (j = 9; j >= i; j--)
                {
                    Console.Write(i + "*" + j + "=" + i * j + "\t");
                }
                Console.WriteLine();
            }

6

           int i,j;
           for (i = 1; i <= 9; i++)
            {
                j = 1;
               while(j<=9)
                {
                    Console.Write(j + "*" + i + "=" + i * j + "\t");
                    j++;
                }
                Console.WriteLine();
            }

7

            int i,j;
            for (i = 1; i <= 9; i++)
            {
                for (j = 8; j >= i; j--) 
                {

                    Console.Write("\t");
                }
                for (j = 1; j <= i; j++)
                {
                    Console.Write(j + "*" + i + "=" + i * j + "\t");
                }
                Console.WriteLine();
            }

8

            int i,j;
            for (i = 9; i >= 1; i--)
            {
                for (j = 2; j <= i; j++)
                {

                    Console.Write("\t");
                }
                for (j = 9; j >= i; j--)
                {
                    Console.Write(i + "*" + j + "=" + i * j + "\t");
                }
                Console.WriteLine();
            }

9

            int i,j;
            for (i = 1; i <= 9; i++)
            {
                for (j = 2; j <= i; j++)
                {

                    Console.Write("\t");
                }
                for (j = 9; j >= i; j--)
                {
                    Console.Write(i + "*" + j + "=" + i * j + "\t");
                }
                Console.WriteLine();
            }