簡單的函數指針應用（linux）

#include<stdio.h>
int max(int x,int y)
{
	if(x>y) return x;
	else return y;
	
}
int main ()
{	
	int x= 10;
	int y= 20;
	int ret;
	int (*pfun)(int a,int b);
	pfun = max;// pfu = &max;

	ret = pfun(x,y);// ret = (*pfun)(x,y);實現效果相同
	printf("%d",ret);
}