Ошибки при заполнении вектора. С++?

Question

[kytcenochka]

Куча ошибок. Помогите реализовать
Все ошибки указывают на эту строчку
std::string get() { return name << "," << last_name << "," << year << "\n";}

#include "stdafx.h"
#include <iostream>
#include <string>
#include <vector>

using namespace std;
class Student
{ 
public:
    std::string name; 
    std::string last_name; 
    std::string year;

    std::string get() { return name << "," << last_name << "," << year << "\n";}
};

int main(int argc, char* argv[])

{
    Student student;
    student.name="Ivan";
    student.last_name="Ivanov";
    student.year = "2001";
    student.get();

    vector<string> v1;
    v1.push_bask(Student::get);
}

Comments

[Модератор]

kytcenochka дорогой пользователь, настоятельно рекомендуем еще раз обратить самое пристальное внимание на п. 3.1 регламента работы сервиса (и, в особенности, на его последний абзац). В противном случае, ваши вопросы будут удаляться по причине тег-спама, а систематические нарушения приведут к блокировке учетной записи.

Answer 1

[Roman]

using namespace std;
class Student
{ 
public:
    string name; 
    string last_name; 
    string year;
    string get() 
    { 
         string s =  name + ',' + last_name + ',' + year;
         return s;
    }
};

int main(int argc, char* argv[])
{
    Student student;
    student.name="Ivan";
    student.last_name="Ivanov";
    student.year = "2001";

    vector<Student> v1;
    v1.push_back(student);
    cout << v1[0].get();
}

Comments

[Roman]

Именно классов? Или объектов одного класса?

[kytcenochka]

Роман 45 ошибок
1>d:\test18.05\test18.05\test18.05.cpp(56) : error C2784: 'std::basic_ostream<_Elem,_Traits> &std::operator <<(std::basic_ostream<_Elem,_Traits> &,const std::basic_string<_Elem,_Traits,_Alloc> &)' : could not deduce template argument for 'std::basic_ostream<_Elem,_Traits> &' from 'std::string'
1> c:\program files\microsoft visual studio 9.0\vc\include\string(537) : see declaration of 'std::operator <<'
1>d:\test18.05\test18.05\test18.05.cpp(56) : error C2784: 'std::basic_ostream<_Elem,_Traits> &std::operator <<(std::basic_ostream<_Elem,_Traits> &,const std::basic_string<_Elem,_Traits,_Alloc> &)' : could not deduce template argument for 'std::basic_ostream<_Elem,_Traits> &' from 'std::string'
1> c:\program files\microsoft visual studio 9.0\vc\include\string(537) : see declaration of 'std::operator <<'
1>d:\test18.05\test18.05\test18.05.cpp(56) : error C2784: 'std::basic_ostream<_Elem,_Traits> &std::operator <<(std::basic_ostream<_Elem,_Traits> &,const std::basic_string<_Elem,_Traits,_Alloc> &)' : could not deduce template argument for 'std::basic_ostream<_Elem,_Traits> &' from 'std::string'
1> c:\program files\microsoft visual studio 9.0\vc\include\string(537) : see declaration of 'std::operator <<'
1>d:\test18.05\test18.05\test18.05.cpp(56) : error C2784: 'std::basic_ostream<_Elem,_Traits> &std::operator <<(std::basic_ostream<_Elem,_Traits> &,const std::basic_string<_Elem,_Traits,_Alloc> &)' : could not deduce template argument for 'std::basic_ostream<_Elem,_Traits> &' from 'std::string'
1> c:\program files\microsoft visual studio 9.0\vc\include\string(537) : see declaration of 'std::operator <<'
1>d:\test18.05\test18.05\test18.05.cpp(56) : error C2784: 'std::basic_ostream &std::operator <<(std::basic_ostream &,unsigned char)' : could not deduce template argument for 'std::basic_ostream &' from 'std::string'
1> c:\program files\microsoft visual studio 9.0\vc\include\ostream(930) : see declaration of 'std::operator <<'
1>d:\test18.05\test18.05\test18.05.cpp(56) : error C2784: 'std::basic_ostream &std::operator <<(std::basic_ostream &,unsigned char)' : could not deduce template argument for 'std::basic_ostream &' from 'std::string'
1> c:\program files\microsoft visual studio 9.0\vc\include\ostream(930) : see declaration of 'std::operator <<'
1>d:\test18.05\test18.05\test18.05.cpp(56) : error C2784: 'std::basic_ostream &std::operator <<(std::basic_ostream &,unsigned char)' : could not deduce template argument for 'std::basic_ostream &' from 'std::string'
1> c:\program files\microsoft visual studio 9.0\vc\include\ostream(930) : see declaration of 'std::operator <<'
1>d:\test18.05\test18.05\test18.05.cpp(56) : error C2784: 'std::basic_ostream &std::operator <<(std::basic_ostream &,unsigned char)' : could not deduce template argument for 'std::basic_ostream &' from 'std::string'
1> c:\program files\microsoft visual studio 9.0\vc\include\ostream(930) : see declaration of 'std::operator <<'

[kytcenochka]

Роман, именно классов

[Roman]

kytcenochka,

string get()  
{ 
         string s =  name + ',' + last_name + ',' + year;
         return s;
}

[Roman]

https://ru.stackoverflow.com/questions/570017/%D0%...

spoiler

#include <iostream>
#include <vector>

class A {
public:
    virtual void print() const = 0;
};

class D : public A {
public:
    D(int i):m_value(i){};
    virtual void print() const { std::cout << m_value << std::endl;}
private:
    int m_value;
};

class B : public A {
public:
    B(const std::string& s):m_value(s){};
    virtual void print() const { std::cout << m_value << std::endl;}
private:
    std::string m_value;
};

int main()
{
    std::vector<A*> Arr(4);
    Arr[0]=new D(11);
    Arr[1]=new D(12);
    Arr[2]=new B("str");
    Arr[3]=new B("str1");

    for(A* item : Arr) {
        item->print();
    }
}

[kytcenochka]

спасибо!