c++ 类指针的使用例子，从Stack Overflow找到的
c++关于类指针的使用，比较有帮助的例子说明，如下：//类函数 指针 (未单独编译)
//参考链接：https://stackoverflow.com/questions/1485983/calling-c-class-methods-via-a-function-pointer
#include <iostream>
#include <map>
#include <vector>
class test1 {
public:
test1() {}
~test1() {}
void show() {
int i = 0;
std::cout << "i am show function" << std::endl;
}
};
//高级应用
class test2 {
public:
test2() {}
~test2() {}
struct ff {
void null() { std::cout << "i am class test2::ff function." << std::endl; }
};
typedef void (ff::*null)();
operator null() {
int i = 0;
return &ff::null;
}
ff f1;
};
void fun1() { std::cout << "fun1" << std::endl; }
int main() {
test1 t1;
void (test1::*p)() = NULL;
p = &test1::show;
(t1.*p)();
test2 t2;
void (test2::ff::*p1)() = NULL;
p1 = t2;
(t2.f1.*p1)();
void (*p2)() = NULL;
p2 = &fun1;
(*p2)();
return 0;
挺好挺好，学习了
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