STL中list中push_back(对象)保存对象的内部实现 1. 在容器中,存放的是对象拷贝 #include<iostream> #include<list> using namespace std; class A{ int i; static int num; public: A():i(){ cout<<"A()" <<endl; num ++;} A(int ii):i(ii){ cout<<"A(in
在ASP.Net中,有时候考虑到较多的使用Session来保存对象,会增加服务器的负载,所以我们会选择用Cookies来保存对象的状态,而Cookies只能保存字符串,这时,我们可以考虑用序列化操作来完成我们的目标. 引入的命名空间 using System.IO; using System.Runtime.Serialization; using System.Runtime.Serialization.Formatters.Binary; 将对象保存到Cookie中. Person per
purorderService.save(newpur);出现如下 org.springframework.orm.hibernate3.HibernateSystemException: illegally attempted to associate a proxy with two open Sessions; nested exception is org.hibernate.HibernateException: illegally attempted to associate a p
代码1 #include <vector> #include <stdio.h> class A { public: A() { printf("A()/n"); } ~A() { printf("~A()/n"); } A(const A& other) { printf("other/n"); } }; int main() { A a; A b(a); A c = a; return 0; } 执行结果1 A
#include <vector> #include <stdio.h> class A { public: A() { printf("A()/n"); } ~A() { printf("~A()/n"); } A(const A& other) { printf("other/n"); } }; int main() { A a; A b(a); A c = a; ; } 执行结果1 A() other oth
