c语言基础: define改变变量值

#include <stdio.h>

static char* g_templname[2] = 
{
    "blacknamelist",
    "whitenamelist"
};
#define ChangState(who,state) \
    do { \
        who = state; \
    }while (0)
int main()
{
  int dhcpstate = 1;
  ChangState(dhcpstate,0);
  printf("%d\n",dhcpstate);
  printf("%s\n",g_templname[1]);
   printf("Hello, World!\n");
   return 0;
}