标签：style blog color os io div 代码 c++
销毁时会按照从后向前的顺序销毁，也就是说，越在后面定义的对象会越早销毁。其中的原因就是函数是在栈中保存的，因此，先定义的对象先压栈，所以在退栈时就会后销毁。而如果参数有多个的话，大多数编译器是从右开始压栈的，也就是参数列表最右边的变量最先压栈，所以参数列表最右边的变量会在最后销毁。
代码如下：
1 #include<iostream> 2 3 using namespace std; 4 5 class Matter { 6 public: 7 Matter(int id) : _identifier(id) 8 {cout << "Matter from " << _identifier << endl; } 9 ~Matter() 10 { cout << "Matter Bye from " << _identifier << endl; } 11 12 private: 13 const int _identifier; 14 }; 15 16 class World { 17 public: 18 World(int id) : _identifier(id),_matter(id) 19 {cout << "Hello from " << _identifier << endl; } 20 ~World() { cout << "Bye from " << _identifier << endl; } 21 22 private: 23 const int _identifier; 24 Matter _matter; 25 }; 26 27 World TheWorld(1); 28 29 int main() { 30 World smallWorld(2); 31 cout << "hello from main()\n"; 32 World oneMoreWorld(3); 33 34 return 0; 35 }
输出结果
Matter from 1 Hello from 1 Matter from 2 Hello from 2 Hello from main() Matter from 3 Hello from 3 Bye from 3 Matter Bye from 3 Bye from 2 Matter Bye from 2 Bye from 1 Matter Bye from 1
标签：style blog color os io div 代码 c++
原文地址：http://www.cnblogs.com/hustcser/p/3894953.html
