Problemchen mit getline

Hans Wurst

Tag,

warum wirft mit folgender Code:

#include <iostream>
#include <conio.h>
#include <vector>
#include <algorithm>
#include <sstream>
#include <fstream>

using namespace std;

int main () 
{
	char name[256], title[256];
	string zeile;	// to read the lines from the data file

	ofstream myfile;
	myfile.open("C:/example_grid.txt");

	while(myfile)
	{
        getline(myfile,zeile);
	}

	return 0;
}

diese Fehlermeldungen aus:

error C2780: 'std::basic_istream<_Elem,_Traits> &std::getline(std::basic_istream<_Elem,_Traits> &,std::basic_string<_Elem,_Traits,_Alloc> &,const _Elem)' : expects 3 arguments - 2 provided
error C2784: 'std::basic_istream<_Elem,_Traits> &std::getline(std::basic_istream<_Elem,_Traits> &,std::basic_string<_Elem,_Traits,_Alloc> &)' : could not deduce template argument for 'std::basic_istream<_Elem,_Traits> &' from 'std::ofstream'
error C2784: 'std::basic_istream<_Elem,_Traits> &std::getline(std::basic_istream<_Elem,_Traits> &,std::basic_string<_Elem,_Traits,_Alloc> &)' : could not deduce template argument for 'std::basic_istream<_Elem,_Traits> &' from 'std::ofstream'
error C2784: 'std::basic_istream<_Elem,_Traits> &std::getline(std::basic_istream<_Elem,_Traits> &,std::basic_string<_Elem,_Traits,_Alloc> &)' : could not deduce template argument for 'std::basic_istream<_Elem,_Traits> &' from 'std::ofstream'
error C2784: 'std::basic_istream<_Elem,_Traits> &std::getline(std::basic_istream<_Elem,_Traits> &,std::basic_string<_Elem,_Traits,_Alloc> &)' : could not deduce template argument for 'std::basic_istream<_Elem,_Traits> &' from 'std::ofstream'
error C2784: 'std::basic_istream<_Elem,_Traits> &std::getline(std::basic_istream<_Elem,_Traits> &,std::basic_string<_Elem,_Traits,_Alloc> &)' : could not deduce template argument for 'std::basic_istream<_Elem,_Traits> &' from 'std::ofstream'

Danke.
H.W.

Hans Wurst

Dann klappts aber leider immer noch nicht. Trotzdem Danke!

ofstream => output filestream

CStoll

Oder auf Deutsch: Ein ofstream dient zur Ausgabe von Daten (Output), du benötigst einen ifstream (Input = Eingabe)