#include "stdafx.h"
#include "iostream.h"

class student  
{
    friend ostream & operator<<(ostream &,const student & );
    friend istream & operator>>(istream & ,student & );
public:
    student(student &);
    student(int,string,string);
    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;
}

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;
}
这是我的代码，为什么会报错误？
错误为：
stduentT.cpp
H:\Program Files\Microsoft Visual Studio\MyProjects\stduentT\stduentT.cpp(14) : error C2629: unexpected 'class student ('
H:\Program Files\Microsoft Visual Studio\MyProjects\stduentT\stduentT.cpp(14) : error C2238: unexpected token(s) preceding ';'
H:\Program Files\Microsoft Visual Studio\MyProjects\stduentT\stduentT.cpp(16) : error C2146: syntax error : missing ';' before identifier 'getName'
H:\Program Files\Microsoft Visual Studio\MyProjects\stduentT\stduentT.cpp(16) : error C2501: 'string' : missing storage-class or type specifiers
H:\Program Files\Microsoft Visual Studio\MyProjects\stduentT\stduentT.cpp(17) : error C2146: syntax error : missing ';' before identifier 'getClassName'
H:\Program Files\Microsoft Visual Studio\MyProjects\stduentT\stduentT.cpp(17) : error C2501: 'string' : missing storage-class or type specifiers
H:\Program Files\Microsoft Visual Studio\MyProjects\stduentT\stduentT.cpp(19) : error C2061: syntax error : identifier 'string'
H:\Program Files\Microsoft Visual Studio\MyProjects\stduentT\stduentT.cpp(20) : error C2061: syntax error : identifier 'string'
H:\Program Files\Microsoft Visual Studio\MyProjects\stduentT\stduentT.cpp(24) : error C2146: syntax error : missing ';' before identifier 'name'
H:\Program Files\Microsoft Visual Studio\MyProjects\stduentT\stduentT.cpp(24) : error C2501: 'string' : missing storage-class or type specifiers
H:\Program Files\Microsoft Visual Studio\MyProjects\stduentT\stduentT.cpp(24) : error C2501: 'name' : missing storage-class or type specifiers
H:\Program Files\Microsoft Visual Studio\MyProjects\stduentT\stduentT.cpp(25) : error C2146: syntax error : missing ';' before identifier 'className'
H:\Program Files\Microsoft Visual Studio\MyProjects\stduentT\stduentT.cpp(25) : error C2501: 'string' : missing storage-class or type specifiers
H:\Program Files\Microsoft Visual Studio\MyProjects\stduentT\stduentT.cpp(25) : error C2501: 'className' : missing storage-class or type specifiers
H:\Program Files\Microsoft Visual Studio\MyProjects\stduentT\stduentT.cpp(31) : error C2039: 'className' : is not a member of 'student'
        H:\Program Files\Microsoft Visual Studio\MyProjects\stduentT\stduentT.cpp(9) : see declaration of 'student'
H:\Program Files\Microsoft Visual Studio\MyProjects\stduentT\stduentT.cpp(31) : error C2039: 'className' : is not a member of 'student'
        H:\Program Files\Microsoft Visual Studio\MyProjects\stduentT\stduentT.cpp(9) : see declaration of 'student'
H:\Program Files\Microsoft Visual Studio\MyProjects\stduentT\stduentT.cpp(32) : error C2039: 'name' : is not a member of 'student'
        H:\Program Files\Microsoft Visual Studio\MyProjects\stduentT\stduentT.cpp(9) : see declaration of 'student'
H:\Program Files\Microsoft Visual Studio\MyProjects\stduentT\stduentT.cpp(32) : error C2039: 'name' : is not a member of 'student'
        H:\Program Files\Microsoft Visual Studio\MyProjects\stduentT\stduentT.cpp(9) : see declaration of 'student'
H:\Program Files\Microsoft Visual Studio\MyProjects\stduentT\stduentT.cpp(35) : error C2061: syntax error : identifier 'string'
H:\Program Files\Microsoft Visual Studio\MyProjects\stduentT\stduentT.cpp(36) : error C2511: 'student::student' : overloaded member function 'void (int)' not found in 'student'
        H:\Program Files\Microsoft Visual Studio\MyProjects\stduentT\stduentT.cpp(9) : see declaration of 'student'
H:\Program Files\Microsoft Visual Studio\MyProjects\stduentT\stduentT.cpp(46) : error C2143: syntax error : missing ';' before 'tag::id'
H:\Program Files\Microsoft Visual Studio\MyProjects\stduentT\stduentT.cpp(46) : error C2501: 'string' : missing storage-class or type specifiers
H:\Program Files\Microsoft Visual Studio\MyProjects\stduentT\stduentT.cpp(46) : fatal error C1004: unexpected end of file found
执行 cl.exe 时出错.
刚开始学习，就出这样的错误很郁闷，希望大家能帮帮小弟，谢谢！

[[it] 本帖最后由 fly_woniu 于 2008-5-3 18:35 编辑 [/it]]

//#include "stdafx.h"
#include<iostream>
#include<string>
using namespace std;

class student  
{
    friend ostream & operator<<(ostream &,student & );
    friend istream & operator>>(istream & ,student & );
public:
    student(student &);
    student(int,string,string);
    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 ,student &stu){
    out<<"this student info is :\n"
        <<"name :"<<stu.getName()<<"\n"
        <<"age :"<<stu.getAge()<<"\n"
        <<"className :"<<stu.getClassName()<<"\n"<<endl;
    return out;
}

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

在VC6环境下编译的

#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;
}
}

这些错误还是自已试着改一下吧，少了分号，少了括号等等。
另外：你的MAIN（）什么都没做，这才是致命错误：
int main(int argc, char* argv[])
{
    return 0;
}
你自已再修改一下吧。

问二楼三楼，程序能正常运行吗？
这个main()函数这样都行，我没用过，不知道，呵呵！！！

能不能说清楚一些啊，我看了好长时间都没有发现问题，可以具体点吗？谢谢了！~

我想他只是为了写个类..所以我没帮他加mn()...呵呵main()

[[it] 本帖最后由 sunkaidong 于 2008-5-3 19:31 编辑 [/it]]

头文件"iostream.h"应该可以啊？请问一下我的错误倒地处在什么地方？我想知道原因，可以指导一下吗？谢谢了啊！

那么多错误提示，怎么看不到吗

iostream.h可以，但建义用iostream.你的程序错误还算少了，你根据错误提示改一下啊。