C++普通函数指针，类成员指针（静态成员函数指针,非静态成员函数指针，静态数据成员指针，非静态数据成员指针）总结

#include
using namespace std;
class A {
public:
	A(int z = 0, double x = 0.0): z(z), x(x) {}
	int fun1(float) { return 0; }
	static double fun2(int, string) { return 0; }
	static int y;
	int z;
private:
	double x;
};
float fun3(double) { return 0; }
int A::y = 0;
int main()
{
	A a(1, 4.2);
	//普通函数指针，两种赋值方式
	float (*p3)(double) = fun3;
	float (*p4)(double) = 0;
	p4 = fun3;
	//类的非静态数据成员指针，两种赋值方式
	int *p5 = &a.z;
	int *p6 = 0;
	p6 = &a.z;
	//类的静态数据成员指针，两种赋值方式
	int* p1 = &A::y;
	int* p2 = 0;
	p2 = &A::y;
	//类的非静态成员函数指针，两种赋值方式
	int (A:: * p7)(float) = &A::fun1;
	int (A:: * p8)(float) = 0;
	p8 = &A::fun1;
	//类的静态成员函数指针，两种赋值方式
	double (*p9)(int, string) = A::fun2;
	double (*p10)(int, string) = 0;
	p10 = A::fun2;
}