c++ 类指针的使用例子，从Stack Overflow找到的

dajunx

c++关于类指针的使用，比较有帮助的例子说明，如下：

[C++] 纯文本查看 复制代码

//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;

昆仔

挺好挺好，学习了