Splitting a string into integers using istringstream in C++

Question

I\'m trying to use istringstream to split a simple string into a series of integers:

#include 
#include 
#include          


        

Answer 1

Hope this helps:
iss : 1 2 3
Iteration 1
iss : 1 2 3 (Initially)
n=1
iss : 2 3
//* 1 is printed
Iteration 2:
iss : 2 3 (Initially)
n=2
iss : 3
//* 2 is printed
Iteration 3
iss : 3
n=3
iss : ''
Iteration 4
iss : ''
n not changed//Flag set for eof of iss as no further input from stream
iss : ''

And as rightly mentioned by the above post while (iss) is not dissimilar from while (iss.eof()).
Internally, the function(istream::operator>>) accesses the input sequence by first constructing a sentry object (with noskipws set to false[This means that space is separator and your list will be 1,2,3]). Then (if good[here eof not reached]), it calls num_get::get [Get the next integer] to perform both the extraction and the parsing operations, adjusting the stream's internal state flags accordingly. Finally, it destroys the sentry object before returning.

Refer : http://www.cplusplus.com/reference/istream/istream/operator%3E%3E/