C++实现了一个大整数类，包括加法，减法，乘法，除法，以及求余等功能，并对以上操作符进行了重载，经反复测试，运行结果正确-C++ implementation of a large integer categories, including addition, subtraction, multiplication, division, and remainder functions, and these operators were overloaded, after repeated tests, the results are correct