实现魔方阵.即N*N(N为奇数)个自然数填入方阵中,使它的每行、每列及对角线的数之和为:(N*(N*N+1))/2-The realization of magic square. That is, N* N (N is an odd number) fill in a matrix of natural numbers, it' s every line, every column, and diagonal and the number of: (N* (N* N+1))/2