数制转换---------

任意给定一个M进制的数x ，请实现如下要求

1) 求出此数x的10进制值（用MD表示）

2) 实现对x向任意的一个非M进制的数的转换。

3) 至少用两种或两种以上的方法实现上述要求

---------- Arbitrary number system conversion to a number of M-band x, requested the achievement of the following requirements 1) to derive the number of x-band of the 10 values (using MD said that) 2) the realization of x to a non-arbitrary number of M-band conversion. 3) at least two or more ways to achieve these requirements