1. 实现原理： * 任何一个数都可以表示成指数形式，如下所示： * * N=nEe (0=<n的绝对值<=1,e为10的指数幂) * * 例如100可以表示成1E2,1001可以表示成1.01E3 * * 类 CBigNumber的成员number为上述的n，exponent为上述的e * * 2. 如何使用这个类: * * 你可以把CBigNumber的头文件和实现函数加入你的工程，然后定义 * * 该类的实例，就可以对这些实例进行加减乘除了(详见示例程序)-1. Principle : * * any one number can be expressed as the exponential form, as follows : * N = nEe (0 = lt; N absolute lt; = 1, e for the index Power 10) * 100 * for example, can be expressed as Mohamad , the 1001 can be expressed as 1.01E3 * * CBigNumber members of the class according to the number n, exponent of the above e * * 2. how to use this category : * * You can CBigNumber documents and the first to achieve the function to join you, then the definition of such * * Example , will be able to carry out these examples modified by addition (see sample program)