Goldbach s conjecture： Goldbach(哥德巴赫)曾经提出了一个这样的猜想： 对于2000 以内的正偶数都能够分解为两个素数之和。 要求： 该题是一个猜想，我们不去证明它，而是通过编程序来验证 该猜想是否正确。 输入： 用户从键盘任意输入一个自然数。 输出： 给出满足猜想的两个自然数。-Goldbach conjecture : Goldbach (Goldbach) had raised such a guess : 2000 within the can is even divided into two prime numbers and. Requirements : The title is a guess, we do not prove it, but through programmed to verify the guess is correct. Input : arbitrary user input from the keyboard to a natural number. Output : meet guess is the natural number two.