对于给定的整数N，设计算法求出（0，N]区间内所有满足x^2+y^2=z^2的所有正整数三元有序数组，并将结果写入文件中。-For a given integer N, design algorithm and the (0, N] range all meet x ^ 2+ y ^ 2 = z ^ 2 all positive integer ternary orderly array, and writes the result to a file.