This program demonstrates the use of constructor and destructor. (C++)

This program demonstrates the use of constructor and destructor

This is a very common interview question so please understand this concept very well.

#include< iostream.h>

#include< conio.h>

#include< stdio.h>

class student

{

private:

char *name;

char *sub;

int marks;

public:

student()//constructor( same name as class)

{

cout< < "Inside the constructor"< < endl;

// allocate the space in the memory.

name=new char[20];

sub=new char[20];

}

void input();

void output();

~student()//destructor(same name with tilde)

{

cout< < endl< < "Inside the distructor"< < endl;

//frees the allocated space

delete name;

delete sub;

}

};

main()

{

clrscr();

student st;

st.input();

st.output();

}

void student::input()

{

cout< < "Enter the name:: ";

gets(name);

cout< < endl< < "Enter the Subject:: ";

gets(sub);

cout< < endl< < "Enter the marks:: ";

cin>>marks;

}

void student::output()

{

cout< < "Name:: "< < name< < endl;

cout< < "Subject:: "< < sub< < endl;

cout< < "Marks:: "< < marks;

}

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