厉害，我一直在学c#，mobile平台的

用命名空间不一定就好．．因为会有空间污染问题．．．如果不是后来用一个新的空间隔开，没办法通过编译．．#include "stdafx.h"这个文件是c下面一个文件替代．．你找找看

#include <iostream>
#include<string>
using namespace std;
namespace demo
{
class student  
{
    friend ostream & operator<<(ostream &,const student & );
    friend istream & operator>>(istream & ,student & );
public:
    student(int,string,string);
    student(student &);
    int getAge();
    string getName();
    string getClassName();
    void setAge(int);
    void setName(string);
    void setClassName(string);
    virtual ~student();
private:
    int age;
    string name;
    string className;
};

student::student(student &stu)
{
    this->age = stu.age;
    this->className = stu.className;
    this->name = stu.name;
}

student::student(int age,string name,string className)
{
    this->age = age;
    this->name = name;
    this->className = className;
}

int student::getAge(){
    return this->age;
}

string student::getName(){
    return this->name;
}

string student::getClassName(){
    return this->className;
}

void student::setAge(int age){
    this->age = age;
}

void student::setName(string name){
    this->name = name;
}

void student::setClassName(string className){
    this->className = className;
}
student::~student()
{
}

int main(int argc, char* argv[])
{
    return 0;
}

ostream & operator<<(ostream &out ,const student &stu){
    out<<"this student info is :\n"
        <<"name :"<<stu.name<<"\n"
        <<"age :"<<stu.age<<"\n"
        <<"className :"<<stu.className<<"\n"<<endl;
    return out;
}

istream &operator>>(istream &in ,student &stu)
{
    in>>"Please input this student info :\n";
    cout<<"name is :"<<"\n";
    in>>stu.name;
    cout<<"age is:"<<"\n";
    in>>stu.age;
    cout<<"className is:"<<"\n";
    in>>stu.className;
    return in;
}
}