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#include "stdio.h"
int main(void)
{
  // ÉùÃ÷Ò»¸öcharÐÍÖ¸Õëpc£¬ÇÒÈÃËüÖ¸Ïò¿ÕÖµ
  char* pc = 0;
  char a = 'a';
  // ÉùÃ÷Ò»¸öÒýÓÃrc£¬ÇÒÈÃËüÒýÓñäÁ¿a
  char& rc = a;
  printf("%d, %c\n", pc, rc);
 
  char *pc2;
  // ÉùÃ÷Ò»¸öÖ¸Õ룬µ«¿ÉÒÔ²»³õʼ»¯
  pc2 = pc;
 
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  // ÉÏÃæÓï¾ä±àÒëʱ£¬»á²úÉúÈçÏ´íÎó£º
  // error C2530: 'rc2' : references must be initialized
  // ¼´£¬Ó¦ÓñØÐë³õʼ


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