说明：  本程序定义了长度为41的数组来存放大数，进行对大数的运算。四则运算的算法就跟平时我们笔算四则运算的方法基本上一样，加减法的时间复杂度为n，乘除法的时间复杂度为n的平方。对四十位内的计算几乎都可以瞬时完成。
(definition of the procedures for the length of the 41 arrays to store large numbers, the majority of arithmetic. Four computing algorithm just as we usually four Operational written calculation methods are basically the same, subtract the time complexity of n, multiply and divide the time complexity of n square. 40 pairs of calculation can be almost instantaneous.)