魔方阵

（1）.设n是奇数，请编写程序构造n*n阶魔方阵，即行、列、两对角线上n个数之和相等的方阵。

（2）.构造3*3素数魔方阵，即找出9个不大于500的素数并排成魔方阵。

-Magic square (1) n is an odd number, please write a program to construct n* n-order magic square that line, column the two diagonal n numbers equal to the sum of the square. (2) construct a 3* 3 primes magic square, i.e. to find the prime number 9 is not greater than 500 and arranged in the magic square.