关于构造函数的一些新的认识

// testconstructor.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include <iostream>

using namespace std;

class Test
{
public:
 Test(int)
 {
  cout << "constructor function of parameter int has been called" << endl;
 }
       
 Test()
 {
  cout << "The default constructor function has been called" << endl;
 }

 void fun()
 {
  cout << "fun() has been called" << endl;
 }

 ~Test()
 {
  cout << "The Destructor function has been called" << endl;
 }
};

int main( void )
{
 Test objA(1);
 objA.fun();
 
 Test objB();

// objB.fun();
} 

VS.Net 2003 运行结果：

constructor function of parameter int has been called
fun() has been called
The Destructor function has been called
Press any key to continue

结论：

Test objB(); //仅仅只是函数声明