DaniWeb Forum Index > Software Development > C++

C++ RSS

endline

Please support our C++ advertiser: Intel Parallel Studio Home

•

Join Date: Feb 2008

Posts: 98

Reputation: Nemoticchigga is an unknown quantity at this point

Solved Threads: 2

Nemoticchigga Nemoticchigga is offline

Offline

Junior Poster in Training

endline

Nov 7th, 2008

I am writing to a text file. Everything is working fine, except I can not figure out how to start a newline. I have tried

fprintf(txtFile, "%s", "\n");
fprintf(txtFile, "%s", '\n');
fprintf(txtFile, "%s\n", " ");

where txtFile is my FILE handle. How do I create a newline? Thanks.

•

Join Date: Sep 2008

Posts: 8

Reputation: koteswarvijay is an unknown quantity at this point

Solved Threads: 2

koteswarvijay koteswarvijay is offline

Offline

Newbie Poster

Re: endline

Nov 7th, 2008

fprintf(txtFile, "\n");
This should work.

Just to keep you informed here, use of %s is only when you need to store a variable.

•

Join Date: Apr 2008

Posts: 670

Reputation: Freaky_Chris is a jewel in the rough

Solved Threads: 113

Freaky_Chris Freaky_Chris is offline

Offline

Practically a Master Poster

Re: endline

Nov 7th, 2008

Can i also point out that those are C functions. If your after the C++ solution it goes something like this

 Help with Code Tags 
 C++ Syntax (Toggle Plain Text) 
#include <ofstream>
#include <iostream>
using namespace std;
 
int main(void){
   ofstream out_file;
   out_file.open("example.txt");
 
   if(out_file.is_good()){
      out_file << "\nHello, World";
      out_file.close();
   }else{
        cout << "Error Opening File";
        cin.get();
   }
 
   return 0;
}
#include <ofstream>
#include <iostream>
using namespace std;

int main(void){
   ofstream out_file;
   out_file.open("example.txt");
   
   if(out_file.is_good()){
      out_file << "\nHello, World";
      out_file.close();
   }else{
        cout << "Error Opening File";
        cin.get();
   }

   return 0;
}

Chris

Knowledge is power -- But experience is everything

•

Join Date: Jul 2008

Posts: 2,001

Reputation: ArkM has much to be proud of

Solved Threads: 343

ArkM

Offline

Postaholic

Re: endline

Nov 7th, 2008

The 1st printf in the original post ( fprintf(txtFile, "%s", "\n"); ) should work too. The simplest way in C style is fputc('\n',txtFile) .

Apropos,

 Help with Code Tags 
 C++ Syntax (Toggle Plain Text) 
     out_file << "\nHello, World";
     out_file.close();
     out_file << "\nHello, World";
     out_file.close();

makes ill-formed text file where the last line is not terminated by line separator...

Last edited by ArkM; Nov 7th, 2008 at 1:21 pm.

•

Join Date: Apr 2008

Posts: 670

Reputation: Freaky_Chris is a jewel in the rough

Solved Threads: 113

Freaky_Chris Freaky_Chris is offline

Offline

Practically a Master Poster

Re: endline

Nov 7th, 2008

Allow me to correct my error

 Help with Code Tags 
 C++ Syntax (Toggle Plain Text) 
     out_file << "\nHello, World\n";
     out_file.close();
     out_file << "\nHello, World\n";
     out_file.close();