vector

yts (32)
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#include <iostream>
#include <string>
#include <vector>

using namespace std;

class student
{
    protected:
    vector<string> subject;
    string facultly;
    string name;
    public:
    student(string name, string facultly,vector<string> subject)
    {
        this->name=name;
        this->facultly = facultly;
        this->subject=subject;
    }
    void setname(string name)
    {
        this->name=name;
    }
    void setfacultly(string facultly)
    {
        this->facultly = facultly;
    }
    void setsubject(string const& d)
    {
        subject.push_back(d);
    }
    vector<string> getsubject()
    {
        return subject;
    }
    string getname()
    {
        return name;
    }
    string getfacultly()
    {
        return facultly;
    }
};

int main()
{
    string subjects;
    string name;
    string facultly;
    vector<string>subject;
    vector<student>stud;

    getline(cin,name);
    student[0].setname(name);
    stud.push_back(name);

    cin>>facultly;
    student[0].setfacultly(facultly);
    stud.push_back(facultly);

    char input='y';
     while(input=='y' || input=='Y')
    {
    cout<<"Subject name=";
    cin>>subjects;
    student[0].setsubject(subjects);
    subject.push_back(subjects);
    cout<<"Do you want to register more students?(Y or N)"<<endl;
    cin>>input;
    }
    student[0].setsubject(subject);
    stud.push_back(subject);
}


can someone tell me where i got error?i got error, cant compile.
Albatross (4553)
You got an error at every instance of student[0]. What were you trying to do there?

Additionally, you got errors when you tried to push_back() individual elements of students, because you're supposed (for stud) to push_back() students. I'd suggest you create a temporary variable that you store your data in, and at the end of the loop push_back() your students.

-Albatross
Last edited on
yts (32)
because the class student will be storing many student record,so there will be student[0],student[1],student[2].....

i m trying to do vector inside vector,inside a container of vector, got student name, facultly and subjects
and subjects itself is a vector also.because a student can add more than one subjects.

Timur (4)
i didn't understand student[0], 1, 2. you first must set name of stud[0].setname(), then you don't need to write stud.push_back(name), this an error. when you setname of stud[0], name goes to that student. anyway you can not write student[0].
yts (32)
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#include <iostream>
#include <string>
#include <vector>

using namespace std;

class student
{
    protected:
    string subject;
    string facultly;
    string name;
    public:
    student(string name, string facultly,string subject)
    {
        this->name=name;
        this->facultly = facultly;
        this->subject=subject;
    }
    void setname(string name)
    {
        this->name=name;
    }
    void setfacultly(string facultly)
    {
        this->facultly = facultly;
    }
    void setsubject(string subject)//const& d)
    {
        this->subject = subject;//subject.push_back(d);
    }
    string getsubject()
    {
        return subject;
    }
    string getname()
    {
        return name;
    }
    string getfacultly()
    {
        return facultly;
    }
};

int main()
{
    string subjects;
    string name;
    string facultly;
    vector<stud>subject;
    vector<student>stud;

    getline(cin,name);
    stud[0].setname(name);
    stud.push_back(stud[0]);

    cin>>facultly;
    a.setfacultly(facultly);
    //stud.push_back(facultly);

    char input='y';
     while(input=='y' || input=='Y')
    {
    cout<<"Subject name=";
    cin>>subjects;
    subject[0].setsubject(subjects);
    subject.push_back(subjects);
    cout<<"Do you want to register more students?(Y or N)"<<endl;
    cin>>input;
    }
    stud[0].push_back(subject);
    stud.push_back(subject);
}


i change to this code, aso got error, can anyone explain to me why?
ne555 (10692)
Could you tell the error?
Edit: it seems that you don't know the difference between class and instance
Last edited on
yts (32)
instance is the object of the class,am i right?
ne555 (10692)
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class student;
vector<stud> subject; //what is a stud?
vector<student> stud; //a class or an object?

Also line 67:subject[0].setsubject(subjects); At this point subject is empty, so you can't access subject[0] (try with vector::at instead of operator[], if fails it throws an exception)
subject.push_back(subjects); You lose me with the names, but I think that subjects is a string and it can't be converted to a stud.
yts (32)
thanks for all reply. I had figure out my way to do it:)
kingdof (1)
yts, can u put ur code at here for me a reference? coz I doing the similar question with u,Thank you, Pls upload it, I'm in urgent case
Albatross (4553)
kingdof,

Wouldn't that ruin the purpose of doing the homework, which is to improve your skills with the language?

-Albatross
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