VC++ 分治法大整数乘法-VC++ divide and conquer large integer multiplication

分治法求大整数乘法 只能支持256位乘法而已，不过已经完整实现了分治法，而且可以支持有符号的数-Divide and conquer method for large integer multiplication multiply it can only support 256, but has been completely realized divide and conquer, and can support a number of symbols