构造函数和析构函数

 1 stock::stock(const std::string &co, long n, double pr)
 2 {
 3     company = co;
 4     shares = n;
 5     share_val = pr;
 6 }
 7 
 8 stock::stock()
 9 {
10     shares = 1;
11     company = "no name";
12     share_val = 1;
13     total_val = 1;

stock name1= {"name1", 10, 2};  //调用带参数的构造函数 C++11
stock name1("name1", 10, 2);
stock *name1 = new stock( "name1", 10, 2 );
stock name1 = stock( "name1", 10, 2 );

stock name2;   //自动调用不带参数的构造函数

int main()
{
    {
        stock name1= {"name1", 10, 2};
        stock name2; 
    }
    while(1);
}
运行结果为：bye,name1
　　　　　　bye,no name
注意：上面加了{}，如果没有，将不会有显示，因为没有大括号，代码块为整个main();