头文件

#ifndef Test1_h
#define Test1_h

class MyClass
{
public:
 int x;
 MyClass();
 virtual ~MyClass();
 void dump();
};

#endif

源文件

#include <test1.h>
#include <iostream>

MyClass::MyClass()
{
  std::cout<<"construct function"<<std::endl;
}

MyClass::~MyClass()
{
  std::cout<<"destruct"<<std::endl;
}

void MyClass::dump()
{
  std::cout<<"dump"<<std::endl;
}

调用：

int main()
{
  MyClass m;
  m.dump();

//结果是
//construct 
//dump
//desturct



   MyClass *p;
   p->dump();

//结果是
//dump

  MyClass *p = new MyClass();
  p->dump();

//结果是
//construct
//dump

  MyClass *p = new MyClass();
  p->dump();
  delete(p);

//结果是
//construct 
//dump
//desturct

淡淡的