Thread: Help in Understanding object return

Below is code for main, Prac.h, Student.h, Student.cpp, Prac.cpp
main

Code:

#include <iostream>
#include <string>
#include <map>
#include<vector>
#include "Student.h"
#include "Prac.h"

using namespace std;

int main()
{
    cout << "Hello world!" << endl;
   // Student h("kunal",89);
    Prac p;
    Student l;
    l= p.test();
    return 0;
}

Student.h

Code:

#ifndef STUDENT_H
#define STUDENT_H
#include <iostream>
#include <string>

using namespace std;
class Student
{
    public:
        /** Default constructor */
        Student();
        Student(string t_name, int t_age);
    protected:
    private:
    string name;
    int age;

};

#endif // STUDENT_H

Student.cpp

Code:

#include "Student.h"

Student::Student()
{
    //ctor
}

Student::Student(string t_name, int t_age){
     name=t_name;
     age=t_age;
}

Prac.h

Code:

#ifndef PRAC_H
#define PRAC_H
#include "Student.h"

class Prac
{
    public:
        /** Default constructor */
        Prac();
        Student& test();

    protected:
    private:
};

#endif // PRAC_H

Prac.cpp

Code:

#include "Prac.h"

Prac::Prac()
{
    //ctor
}
Student& Prac::test(){


    Student p("asdas",90);

    cout<<&p;
    return p;
}

When I compile program, I get error:
PATHcode/PlusPlusC/learn/src/Prac.cpp||In member function ‘Student& Prac::test()’:|
PATH/Documents/lab/code/PlusPlusC/learn/src/Prac.cpp|10|warning: reference to local variable ‘p’ returned [enabled by default]|
||=== Build finished: 0 errors, 1 warnings ===|

When I run program, I get an exception.

I am going blind in this phase, how to return an object of class.
when to use * and when to use & while passing and returning.

Any help shall be highly appreciated in this problem.
I am new to c++/pointers/reference world.

laserlight,
thank you for the help.
I misunderstood it, as p is passing address of it.
Thank you again.