CheckSum.txt多种方式实现，并直接会值给buffer

//和校验，亲测可用【这个比较复杂】
USHORT CparaSet::checksum(USHORT *buffer, int size)
{

USHORT  cksum=0; 
while (size > 1) 
{ 
cksum += *buffer++; 
size -= 2;
} 
if (size) 
{ 
cksum += *(UCHAR*)buffer; 
} 
cksum = (cksum >> 16) + (cksum & 0xffff); 
cksum += (cksum >>16); 
// return cksum;
return (USHORT)(~cksum);


}
//和校验，亲测可用【这个比较简单】

unsigned int CparaSet::Checksum8bit(unsigned int cksum, void *pBuffer, unsigned int size)
{

// int sum = 0;
 for (int i = 0; i < size; i++)
 {
cksum += SendBuff[i];