关于调用析构函数的问题，求教啊爱爱爱！

#include<iostream>
using namespace std;
class goods{
private:
    static int totalweight;
    int weight;
public:
    goods(int w)
    {
        weight=w;
        totalweight+=w;
    }
    goods(goods&gd)
    {
        weight=gd.weight;
        totalweight+=weight;
    }
    ~goods()
    {
        totalweight-=weight;
    }
    int getwg()
    {
        return weight;
    }
    static int gettotal()
    {
        return totalweight;
    }
};
int goods::totalweight=0;
void main()
{
    int w ;   
    cout<<"the initial weight of goods:"<<goods::gettotal()<<endl;
    cin>>w;
    goods g1(w);//输入25
    cin>>w;
    goods g2(w);//输入60
    cout<<"the total weight of goods:"<<goods::gettotal()<<endl;
输出为the initial weight of goods:0
      the total weight of goods:85  
用类建立对象的时候不是会自动调用构造函数吗？？但是对象消失的时候会自动调用析构函数，~goods()
    {
        totalweight-=weight;
    }
我的问题就是这道题目的对象在什么时候消失的？？？能不能帮我注释一下啊！
我的意思是输出应该是the initial weight of goods:0
                    the total weight of goods:0






}