实现两个大整数的相乘、附有测试数据以及试验报告一份。-achieve two large integer multiplication, with the test data and a test report.

输入两个大整数，整数长度可以很长，原则上没有长度限制，将这两个大整数进行相乘得出结果。-Enter the two big integers, integer length can be very long, in principle, there is no length limit, these two big integers multiplying the result.

C++实现两个5000位以内的大整数相乘-C++ Two BigInteger multiply