代码

#include <math.h>
#include<cstdio>

void poly_multiply(unsigned *a, int n, unsigned *b, int m, unsigned *c)
{
    for(int i=0;i<=n;++i)
    {
  	 	 for(int j=0;j<=m;++j)
  	 	 {
        		c[i+j]+=a[i]*b[j];
   		 }
    }
}

评测结果