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working with stringstream

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Join Date: Oct 2008

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working with stringstream

Oct 19th, 2008

I am storing some data in a sting & I'm retriving it using stringstream but the problem is that it repeates last element two times.I could not understand why is this happning?Is there anyone who can help me on solving this problem?
Programme code is as follows:::::::::::::

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#include<iostream>
#include<sstream>
 
using namespace std;
 
int main()
{
        int i,x;
 
        stringstream sstr;
        string line;
 
        for(i=0;i<3;i++) {
                getline(cin,line);
 
                sstr<<line;
 
                while(sstr) {
                        sstr>>x;
                        cout<<x<<" ";               //output repeates last element two times
                }
 
                cout<<endl;
 
                sstr.clear();
        }
 
        return 0;
}
#include<iostream>
#include<sstream>

using namespace std;

int main()
{
        int i,x;

        stringstream sstr;
        string line;

        for(i=0;i<3;i++) {
                getline(cin,line);

                sstr<<line;

                while(sstr) {
                        sstr>>x;
                        cout<<x<<" ";               //output repeates last element two times
                }
               
                cout<<endl;

                sstr.clear();
        }

        return 0;
}

Last edited by Ancient Dragon; Oct 19th, 2008 at 8:05 am. Reason: add code tags

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Join Date: Sep 2008

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Re: working with stringstream

Oct 19th, 2008

Reason is that sstr is set to false AFTER trying to read after EOF. So first you read last item, it's ok, when while sees no error, continues, but you can't read more, so x is assigned to last good reading (last number) AND then sstr is set to FALSE!

You need this:
while (sstr>>x){//do stuff with x}