C++ 函数指针

#include<iostream>
using namespace std;

typedef int(*PF)(int, int);

int add(int a, int b)
{
	return a + b;
}

int sub(int a, int b)
{
	return a - b;
}

int main()
{
	PF pf;
	pf = add;
	cout << pf(1, 2) << endl;
	pf = sub;
	cout << pf(1, 2) << endl;

	system("pause");
	return 0;
}