函数指针

#include "stdio.h"void function_test(void){  printf("function_test\r\n");}void main(void){  int a=0;  int b=1;  int c=2;  int d=3;  void (*p)(void);  p = &function_test;  (*p)();  a=b=c=d=1;  printf("a=%d b=%d c=%d d=%d \r\n",a,b,c,d);}