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getline() error (c++)

Started by Ekim_Gram Sep 8, 2003 at 12:03 AM 1 reply 350+ views

Original Post

Sep 8, 2003 at 12:03 AM

Ok, I''m making an address book. I gotta be quick so I''ll post more of a description later if needed but I''m having an error with the getline() function. Here''s the class function that uses it:

class Address_Book
{
public:
	Address_Book();
	void Add_Address();
	void Edit_Address();
	void Delete_Address();
private:
	vector<DATA> Address_Data;
	vector<char*> Addresses;
	ofstream Write;
	ifstream Read;
	char* Line;
};

Address_Book::Address_Book()
{
	int i = 0;
	Line = "";
	Read.open("Addresses.txt");

	if (Read.fail())
		{
		cout << "Unable to load your address book.\n";
		Read.close();
		}
	
	while(!Read.eof())
		{
		Read.getline(Read, Line); // error here

		Addresses.push_back(Line);
		cout << Addresses[i] << endl;
		i++;
		}
	
	Read.clear();
	Read.close();
}

This is what the error says: C:\Documents and Settings\Michael\Desktop\Projects\Address Book\main.cpp(48) : error C2664: ''class std::basic_istream > &__thiscall std::basic_istream >::getline(char *,int)'' : ca nnot convert parameter 1 from ''class std::basic_ifstream >'' to ''char *'' No user-defined-conversion operator available that can perform this conversion, or the operator cannot be called Error executing cl.exe. Address Book.exe - 1 error(s), 0 warning(s) I''m using MSVC++ 6.0

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MelvinElvin

Sep 8, 2003 at 12:19 AM

check the declaration of getline. The first parameter is a pointer to a stream of chars, not an input stream.
the call:
Read.getline(Read,Line) ;
would be entirely silly. The first parameter would just be this.

daerid

Sep 8, 2003 at 1:48 AM

use std::getline instead of ifstream::getline, and std::string instead of char* :


while(!Read.eof())
{
  std::string line;
  std::getline(Read,line);
  Addresses.push_back(line);
  std::cout << Addresses.back() << std::endl;
}
Read.clear();
Read.close();

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