Solved

Creating a text file from a string

Posted on 2009-04-08
2
333 Views
Last Modified: 2012-05-06
Hello,

I'm an experienced VB.NET developer trying to work on some C++ console code.  

I'm trying to write to a text file, but it doesn't seem to be working.  I am getting the following error: "error C2664: 'std::basic_ofstream<_Elem,_Traits>::basic_ofstream(const char *,std::ios_base::openmode,int)' : cannot convert parameter 1 from 'std::basic_string<_Elem,_Traits,_Ax>' to 'const char *'"

I'm assuming it's telling me I can't use a String variable to do this...  So, how do I use a string variable to create the file name?
#include "StdAfx.h"
#include "Dictionary.h"
#include <iostream>
#include <fstream>
#include <string>
using namespace std;
 
bool myClass::CreateTextFile(string fileName)
{
	ofstream file_out("C:\\" + fileName + ".txt", ios::out);
	if (! file_out) 
		return false;
 
	return true;
}

Open in new window

0
Comment
Question by:Torrwin
2 Comments
 
LVL 53

Accepted Solution

by:
Infinity08 earned 500 total points
ID: 24101070
The ofstream constructor takes a const char* as first parameter, not an std::string, so :
std::string filename = "C:\\" + fileName + ".txt";
std::ofstream file_out(filename.c_str(), ios::out);

Open in new window

0
 
LVL 40

Expert Comment

by:mrjoltcola
ID: 24101085
One of the ugly downsides that people have griped about for years. I keep wondering when C++0x is going to fix this?

You can try this 1-liner

ofstream file_out((string("C:\\") + fileName + ".txt").c_str(), ios::out);
0

Featured Post

Master Your Team's Linux and Cloud Stack

Come see why top tech companies like Mailchimp and Media Temple use Linux Academy to build their employee training programs.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Often, when implementing a feature, you won't know how certain events should be handled at the point where they occur and you'd rather defer to the user of your function or class. For example, a XML parser will extract a tag from the source code, wh…
This article will show you some of the more useful Standard Template Library (STL) algorithms through the use of working examples.  You will learn about how these algorithms fit into the STL architecture, how they work with STL containers, and why t…
The viewer will learn how to user default arguments when defining functions. This method of defining functions will be contrasted with the non-default-argument of defining functions.
The viewer will be introduced to the technique of using vectors in C++. The video will cover how to define a vector, store values in the vector and retrieve data from the values stored in the vector.

772 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question