Re: The behavior of istream.

I was trying to understand the concept of Iterator from the book "Programming -- Principles and Practice Using C++" by Bjarne Stroustrup

I was trying to understand the program in Chapter 20.6.2

But the exact copy of the code was crashing and was not able to read the newline also from the console.

So I did little bit of experiment and change the code as follows

#include <iostream>

#include<list>

#include <vector>

using namespace std;

class Text_iterator;

typedef vector<char> Line;

class Text_iterator {

    list<Line>::iterator ln;

    Line::iterator pos;

public:

    Text_iterator( list<Line>::iterator ll, Line::iterator pp ):ln(ll),pos(pp) {

    }

    char& operator *() {

        return *pos;

    }

    Text_iterator & operator++() {

        if ( pos == ln->end() ){

            ++ln;

            pos = ln->begin();

        }

        else {

        ++pos;

        }

         return *this;

    }