Programming Forums > Application Development > C++

wingz198 · Oct 18th, 2005, 9:02 PM

I'm trying to read in a file of words that are all on seperate lines and insert them into a vector. I need to read the words in as strings and I'm getting errors when I try to use getline() and push_back. I was sure that at least the vector would work as every example I've seen works like that.

(Toggle Plain Text)

    vector<string> words;
    string word;

    while (!inputStream.eof())
    {
        inputStream.getline(word, 30);
        words.push_back(word);
    }

And I'm getting these errors:

(Toggle Plain Text)

main.cpp:28: no matching function for call to `std::basic_ifstream<char,
   std::char_traits<char> >::getline(std::string&, int)'
/usr/include/c++/3.2.2/bits/istream.tcc:664: candidates are:
   std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT,
   _Traits>::getline(_CharT*, int, _CharT) [with _CharT = char, _Traits =
   std::char_traits<char>]
/usr/include/c++/3.2.2/istream:176:                 std::basic_istream<_CharT,
   _Traits>& std::basic_istream<_CharT, _Traits>::getline(_CharT*, int) [with
   _CharT = char, _Traits = std::char_traits<char>]

main.cpp:29: no matching function for call to `std::vector<char*,
   std::allocator<char*> >::push_back(std::string&)'
/usr/include/c++/3.2.2/bits/stl_vector.h:492: candidates are: void
   std::vector<_Tp, _Alloc>::push_back(const _Tp&) [with _Tp = char*, _Alloc =
   std::allocator<char*>]
make: *** [main.o] Error 1

The Dark · Oct 18th, 2005, 9:47 PM

The std::basic_istream<_CharT, _Traits> class that you are using does not support std::strings as parameters to the getline function. Use the std:string getline function instead

(Toggle Plain Text)

    vector<string> words;
    string word;

    while (!inputStream.eof())
    {
        getline(inputStream, word);
        words.push_back(word);
    }

If you really want to limit the size to 30 characters, you coudl add the following lines after the getline

(Toggle Plain Text)

  if (word.length() > 30)
    word.resize(30);

Oct 18th, 2005, 9:02 PM	#1
wingz198 Newbie Join Date: Sep 2005 Location: Omaha, NE Posts: 8 Rep Power: 0	String I/O and Vector Insert errors I'm trying to read in a file of words that are all on seperate lines and insert them into a vector. I need to read the words in as strings and I'm getting errors when I try to use getline() and push_back. I was sure that at least the vector would work as every example I've seen works like that. (Toggle Plain Text) vector<string> words; string word; while (!inputStream.eof()) { inputStream.getline(word, 30); words.push_back(word); } vector<string> words; string word; while (!inputStream.eof()) { inputStream.getline(word, 30); words.push_back(word); } And I'm getting these errors: (Toggle Plain Text) main.cpp:28: no matching function for call to `std::basic_ifstream<char, std::char_traits<char> >::getline(std::string&, int)' /usr/include/c++/3.2.2/bits/istream.tcc:664: candidates are: std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::getline(_CharT, int, _CharT) [with _CharT = char, _Traits = std::char_traits<char>] /usr/include/c++/3.2.2/istream:176: std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::getline(_CharT, int) [with _CharT = char, _Traits = std::char_traits<char>] main.cpp:29: no matching function for call to `std::vector<char, std::allocator<char> >::push_back(std::string&)' /usr/include/c++/3.2.2/bits/stl_vector.h:492: candidates are: void std::vector<_Tp, _Alloc>::push_back(const _Tp&) [with _Tp = char, _Alloc = std::allocator<char>] make: *** [main.o] Error 1 main.cpp:28: no matching function for call to `std::basic_ifstream<char, std::char_traits<char> >::getline(std::string&, int)' /usr/include/c++/3.2.2/bits/istream.tcc:664: candidates are: std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::getline(_CharT, int, _CharT) [with _CharT = char, _Traits = std::char_traits<char>] /usr/include/c++/3.2.2/istream:176: std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::getline(_CharT, int) [with _CharT = char, _Traits = std::char_traits<char>] main.cpp:29: no matching function for call to `std::vector<char, std::allocator<char> >::push_back(std::string&)' /usr/include/c++/3.2.2/bits/stl_vector.h:492: candidates are: void std::vector<_Tp, _Alloc>::push_back(const _Tp&) [with _Tp = char, _Alloc = std::allocator<char>] make: *** [main.o] Error 1

Oct 18th, 2005, 9:47 PM	#2
The Dark Expert Programmer Join Date: Jun 2005 Posts: 852 Rep Power: 4	The std::basic_istream<_CharT, _Traits> class that you are using does not support std::strings as parameters to the getline function. Use the std:string getline function instead (Toggle Plain Text) vector<string> words; string word; while (!inputStream.eof()) { getline(inputStream, word); words.push_back(word); } vector<string> words; string word; while (!inputStream.eof()) { getline(inputStream, word); words.push_back(word); } If you really want to limit the size to 30 characters, you coudl add the following lines after the getline (Toggle Plain Text) if (word.length() > 30) word.resize(30); if (word.length() > 30) word.resize(30);

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Programming Forums > Application Development > C++

String I/O and Vector Insert errors