大整数运算，有一些整数，其位数可能上百位。在功能上要对这些整数做加、减、乘、整除及取余运算。在程序组织上要求通过大整数类型的设计，来体现更好的可读性和可维护性，并且对错误采用异常方法处理。-Large integer arithmetic, some integer may be hundreds of bits. The function of these integers do add, subtract, multiply, divisible modulo operator. Program organizational requirements through large integer type design, to reflect better readability and maintainability, and error abnormal approach.