int *x,*y;*x++=*y++

*x则是定义地址，*x++实际是X储存的地址的下一位，

*x++=*y++

意思就是把y储存的地址的下一位赋值给X储存的地址的下一位

# include <stdio.h>

int main(void)

{

  int x=30,*y,*z;

    y=&x;

    z=y;

    *y=*z;

    printf("%d %d %d ",x,y,z);

printf("\n");

*y++ = *z++;

   x++;

   printf("%d %d %d ",x,y,z);

   printf("\n");

   return 0;

}

# include <stdio.h>

int main(void)

{

  int x=30,*y,*z;

    y=&x;

    z=y;

    *y=*z;

    printf("%d %d %d ",x,y,z);

printf("\n");

*y++ = *z;

   x++;

   printf("%d %d %d ",x,y,z);

   printf("\n");

   return 0;

}