stringstream didn't accept any data after clear it

Question

I'm trying to read a block of data end with "()" from the user and send it to stringstream, doing some operations on it (for ease now let's said I just want to print these data), and accept a new block of data again, finished this by enter EOF, Here is the code

while(cin >> temp)
    {
        if(temp != "()")
        {
            strem << temp + " ";
        }
        else
        {
            while(strem >> str)
                cout << str << " ";
            cout << "\n";
            strem.str("");
        }

    }

Now after this line strem.str(""); strem didn't read any data in the next loop. I try to debug this by adding this line

cout << strem.str() << "\n"; so the whole code is

while(cin >> temp)
    {
        if(temp != "()")
        {
            strem << temp + " ";
            cout << " strem.str() : " cout << strem.str() << "\n";
        }
        else
        {
            while(strem >> str)
                cout << str << " ";
            cout << "\n";
            //strem.str("");
            strem.str(string());
        }

    }

to see what is the content of the strem, to summarize, it's print the first block, but after that print nothing. any idea what's going on!!

There's one duplicate which is higher upvoted, but this one is much clearer and straight to point. — Yksisarvinen, Aug 11 '19 at 16:00

score 2 · Accepted Answer · answered Aug 11 '19 at 16:05

2

Doing this

while(strem >> str)

It is almost certain that a flag is set on the stream. So you need to clear stream state before trying to write on it again. You can do this with a

strem.clear()

answered Aug 11 '19 at 16:05

Doch88

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stringstream didn't accept any data after clear it

1 Answers1