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char *last = "sd"; // ¿É±ä²ÎµÄ¹Ì¶¨²ÎÊý ÏÂÃæµÄÓï¾äÓÃÀ´»ñµÃ¹Ì¶¨²ÎÊýºóµÄ ¿É±ä²ÎµØÖ·
char *ap = (char *)&last + sizeof(last);
char *ap = (char *)(&last + sizeof(last)); //ÕâÁ½¾ä»°µÃ³öµÄ apµØÖ·ÍêÈ«²»Í¬Ñ½

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// -------------------------------------------- ÍêÕûµÄ³ÌÐò
#include <stdio.h>

#define arg_start(ap, last) (ap = (char *)&last + sizeof(last))
//#define arg_start(ap, last) (ap = (char *)(&last + sizeof(last)))

#define arg_get(ap, type) *((type *)((ap += sizeof(type)) - sizeof(type)))
#define arg_end(ap) (ap = NULL)

void myprint(char *s, ...)
{
  char *ap = arg_start(ap, s); //»ñµÃµÚÒ»¸ö¿É±ä²ÎÊýµÄµØÖ·
  char c = *s; //È¡¹Ì¶¨²ÎÊý

  while (c) 
  {  
  if (c == 's')
  printf("s == %s \n", ((char*)arg_get(ap, char*))); // ´òÓ¡¿É±ä²Î 
   
  if (c == 'd')
  printf("d == %d \n", ((int)arg_get(ap, int))); // ´òÓ¡¿É±ä²Î 
   
  s++;
  c =


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