初学者问题，望高手指教！ - 编程论坛

#2

flyingcloude2008-05-03 19:01

//#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

#3

sunkaidong2008-05-03 19:03

#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;
}
}

#4

zjl1382008-05-03 19:05

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。

#5

zjl1382008-05-03 19:09

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！！！

#6

fly_woniu2008-05-03 19:11

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！~

#7

sunkaidong2008-05-03 19:13

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]]

#8

fly_woniu2008-05-03 19:18

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！

#9

风的声音2008-05-03 19:20

那么多错误提示，怎么看不到吗

#10

zjl1382008-05-03 19:24

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。

#11

fly_woniu2008-05-03 19:33

我用了三楼的代码，可是出现了
test.cpp(98) : fatal error C1010: unexpected end of file while looking for precompiled header directive
这样的错误这是怎么回事？

#12

sunkaidong2008-05-03 19:35

我用vc６.０调好给你的．．加个main（）

#13

fly_woniu2008-05-03 19:39

对啊，我刚才也用vc６.０把你的代码复制进去调试的，可是就报上面的错误，不知道为什么，我刚学就遇到这样的麻烦，真有点郁闷

#14

zjl1382008-05-03 19:56

你刚学就写这种程序，会不会夸张了一点，你知道你写得程序是什么意思吗？如果不懂，就算程序能运行也没什么意义。

#15

fly_woniu2008-05-03 19:59

知道啊，不过我这种错误却解决不了，哎。。。帮帮忙吧，我有些头大了

#16

zjl1382008-05-03 20:05

你真的懂吗？你看一下你的main（）函数：
int main(int argc, char* argv[])
{
return 0;
}
什么都没有，能不错吗？你若想输出学生的信息，你要调用他的函数啊。

#17

sunkaidong2008-05-03 20:06

你如果是初学，这个程序是相当好了

#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;
}
}
int main(void)
{
    demo::student s(14,"王二","一班");
    cout<<s;
    return 0;
}

#18

fly_woniu2008-05-03 20:15

谢谢啊，不过错了，哎。。。

#19

sunkaidong2008-05-03 20:16

你的程序很有点c＃的味道．．呵呵．．

#20

fly_woniu2008-05-03 20:20

恩，你给我的程序我在头部加了一个#include "stdafx.h"
就可以了，不过请问为什么要用using namespace语句？我刚才的那个#include "stdafx.h" 和#include "iostream.h"不可以吗？还有就是我本来是写在三个文件中的，student.h定义类，student.cpp实现类定义，另一个文件中定义main函数，我没有用using namespace std，我一直在用 #include "stdafx.h" 和#include "iostream.h"为什么会出错？请明示好吗?谢谢了！

#21

fly_woniu2008-05-03 20:21

厉害，我一直在学c#，mobile平台的

#22

sunkaidong2008-05-03 20:25

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

#23

yangyangfeng2008-05-04 09:54

#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;
}
}