001122334455 转为00:11:22:33:44:55实现

输入src 001122334455

输出dest 00:11:22:33:44:44

void string_to_mac_address(char* src,char* dest)
{
   size_t len=strlen(src);
   const char *s = src;
   int num=0;
   if (len<12)
      return;
   if (len) 
   {
        while (len!= 0) 
		{
            if(*s== '\0')
                    break;
            if(num==2)
            {
                *dest=':';
                 dest++;
                 num=0;
                 continue;
            }
            *dest=*s;
            s++;
            dest++;
            num++;
            len--;
            if(len<2)
               num=0;
        }
        *dest = '\0';
   }
}

00:11:22:33:44:55 转为001122334455实现

输入 src 00:11:22:33:44:55

输出 dest 001122334455

void mac_to_string_address(char* src,char* dest)
{
    const char *s = src;
    size_t len = strlen(src);
    printf("src=%s len=%d\n",src,len);

    if (len) 
	{
        while (len!= 0) 
		{
            if(*s==':')
            {
                s++;
                len--;
                continue;
            }
            if(*s== '\0')
                break;
            *dest=*s;
            s++;
            dest++;
            len--;
        }
        *dest = '\0';
    }

}