程序A：
#include<iostream>
#include<string>
using namespace std;
using std::string;

class Student
{
public:
     Student(void);
     Student(int num, string name, char sex);
     ~Student(void);
     void Display(void);
private:
     int m_num;
     string m_name;
     char m_sex;
};
 

Student::Student(void)
{
     m_num = 1001;
     m_name = "Brian";
     m_sex = 'M';
     cout << "DefaultConstructor" << endl;
}
 
Student::Student(int num, string name, char sex) : m_num(num), m_name(name), m_sex(sex)
{
     cout << "Constructor" << m_name << endl;
}
 
Student::~Student(void)
{
     cout << "Destructor" << m_name << endl;
     getchar();
}
 
void Student::Display(void)
{
     cout << "num: " << m_num << '\n';
     cout << "name: " << m_name << '\n';
     cout << "sex: " << m_sex << endl;
}

int _tmain(int argc, _TCHAR* argv[])
{
    Student stud[2] = {Student(1002, "lisa", 'F'), };
     stud[0].Display();
     stud[1].Display();
     getchar();
     return 0;
}
结果是：
Constructorlisa
Destructorlisa
DefaultConstructor
num: 1002
name: lisa
sex: F
num: 1001
name: Brian
sex: M
DestructorBrian
Destructorlisa

程序B：
#include<iostream>
using namespace std;

class A
{
public:
    A();
    A(int x);
    ~A() { cout << "destructor called" << itsnumber << endl;getchar();}
private:
    int itsnumber;
};

A::A()
{
    itsnumber=5;
    cout << "constructor called" << itsnumber<< endl;
    getchar();
}

A::A(int x)
{
    itsnumber=x;
    cout << "constructor called" << itsnumber << endl;
    getchar();
}

int _tmain(int argc, _TCHAR* argv[])
{
    A a[2]={A(8),};
    getchar();
    return 0;
}
运行结果是：
constructor called8
constructor called5
destructor called5
destructor called8
网上有人说有个对象的临时拷贝，但这样的话程序A和B是说不通的，望高人指点。

[ 本帖最后由 grow 于 2010-9-22 15:28 编辑 ]