打印如下规律的螺旋矩阵，尽管存在求数值规律的方法，但本代码的方法更为基本和通用。vc++ 2005环境。

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17 18 19 20 21　　-Print the following laws of the spiral matrix, despite the existence of the law for numerical methods, but this code is more basic and common methods. vc++ 2005 environment. 1 2 9 10 254 3 8 11 245 6 7 12 2316 15 14 13 2217 18 19 20 21