C++ getline() jumped over empty strings

Question

I'm reading with my c++ program csv file:

abc;def;ghi

10;;10

by this code:

    while(getline(in, str, '\n')){
      stringstream ss;
      while(getline(ss, str, ';')){
         line.add(str);
      }
    }

Where in is input file, str is string variable and line is my collection (like vector). But getline jumped over the empty string in csv file.

Can anyone help me to reading empty string, too?

Thanks :)

How do you know that it jumped? Anyway it will not enter second loop when the line is empty. — artahian, Mar 21 '13 at 21:26
aram90: i have temp variable that counts numbers of reading and also in my list there is only 2 strings. — Lukas Hamrla, Mar 21 '13 at 21:38

Kerrek SB · Accepted Answer · 2013-03-21T21:43:33.277

2

You've never initialized your stream!

Try this:

#include <string>   // for std::string and std::getline
#include <sstream>  // for std::istringstream

for (std::string jimbob; std::getline(in, jimbob); )
{
    std::istringstream marysue(jimbob);  // !
    for (std::string charlie; std::getline(marysue, charlie, ';'); )
    {
        line.add(charlie);
    }
}

edited Mar 21 '13 at 21:43

answered Mar 21 '13 at 21:26

Kerrek SB

464,522
92
875
1,084

I've initialized it before by this: ifstream in ( inFileName ); if (in.fail()) return false; It's ok. But compiler doesnt like your code :( error: no matching function for call to ‘std::basic_istringstream::basic_istringstream(std::ifstream)' – Lukas Hamrla Mar 21 '13 at 21:37
You seem to be doing something completely different. There is no `ifstream` in my code at all. Are you misspelling `ln` as `in`? Let me rename the variables. – Kerrek SB Mar 21 '13 at 21:44
@LukasHamrla: I find that hard to believe. The code does [exactly what it should](http://ideone.com/k5JMCr). – Kerrek SB Mar 21 '13 at 21:52

C++ getline() jumped over empty strings

1 Answers1