CODEWITHSUNDEEP
cvisual-studio-2008command-prompt
user3732613
user3732613

Reputation: 11

Writing multiple lines in a file in C

#include <stdio.h>
int main ()
{
  FILE * fp;
  int i,n;
  char str[20];
  printf("Enter the number of lines to be written: ");
  scanf("%d", &n);
  fp = fopen ("abc.txt","w"); 
  for(i = 0; i < n+1;i++)
  {
    gets(str);
    fputs(str, fp);
  }

  fclose (fp);
  return 0;
}

In this code, I am able to write multiple lines but when I check the result in the notepad, these multiple lines are displayed in a single line. How can I make them appear as I typed in the command prompt (here I am using Visual Studio 2008 command prompt).

Upvotes: 1

Views: 6826

Answers (5)

user72244
user72244

Reputation: 1

As WhozCraig pointed out, gets is evil and is akin to asking for a buffer overflow.

But to answer your question, add a CRLF (carriage return + line feed) like such:

#include <stdio.h>

int main(void){ 
    FILE* fp;
    int n;
    char str[20];
    printf("Enter the number of lines to be written: ");
    scanf("%d", &n);
    fp = fopen ("abc.txt","w"); 
    for(int i = 0; i < n+1;i++){
        gets(str);
        fputs(str, fp);
        fputs("\r\n", fp);
    }
    fclose (fp);
    return 0;
}

Upvotes: 0

saravanakumar
saravanakumar

Reputation: 1777

You replace existing so add 

    #include <stdio.h>
    int main ()
    {
      FILE * fp;
      int i,n;
      char str[20];
      printf("Enter the number of lines to be written: ");
      scanf("%d", &n);
      fp = fopen ("abc.txt","w"); 
      for(i = 0; i < n+1;i++)
      {
        gets(str);
        fputs(str, fp);
        fputs("\n", fp);
      }

      fclose (fp);
      return 0;
    }

after add your input. 

    fputs("\n", fp);

add new line to your file abc.txt after your text get added.

Upvotes: 2

Rahul Tripathi
Rahul Tripathi

Reputation: 172458

You may try like this:

fputs("\n", fp);

ie, put a \n to move to the next line. \n is used as a newline character in C

Upvotes: 1

Bathsheba
Bathsheba

Reputation: 234715

You need to append \r\n to each line. (Carriage return plus line feed.)

UNIX requires just \n but some of the Windows tools don't deal with that well.

Upvotes: 0

Elliott Frisch
Elliott Frisch

Reputation: 201447

Add something like this,

fputs(str, fp);
fputs("\r\n", fp); /* add a Windows new line */

Upvotes: 1

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