说明：  C++ 掷双骰子的相关算法代码，规则如下：每次掷两个骰子，每个骰子的6面上分别标有1、2、3、4、5、6，两个骰子停止滚动后，计算其向上的点数之和。
(The relevant algorithm code for C ++ tossing the dice is as follows: each time you roll two dice, the six sides of each dice are marked with 1, 2, 3, 4, 5, 6, respectively. The sum of upward points.)