Solved

Writing to a text file in C

Posted on 2012-03-29
3
303 Views
Last Modified: 2012-03-29
Hi -
I have one more question regarding the writing to a text file.   I posted earlier yesterday and resolved the permission issues.   The program is working technically... but not as expected.  I'm not sure what I've done wrong here...   Please view code below and attached files which shows the difference between what the user sees on the display (printf) and what the user sees in the text file (fprintf).   I would appreciate a point in the right direction.   Thanks!

#include <stdio.h>
#include <stdlib.h>


int main (void)
{
      /*LOCAL DEFINITIONS*/

      FILE* fpNumbs;
      void pyramid(FILE *fpNumbs);
      
      /*STATEMENTS*/
      
      
      fpNumbs=fopen("C:\\MyOutput.txt", "w");

      if (fpNumbs == NULL)
      {
            printf("Error opening text file!!\n");
            system("pause");
      }
      else
            pyramid(fpNumbs);
            system("pause");

      return 0;
}



/*~~~~~~~~~~~~~~~~~  pyramid Function ~~~~~~~~~~~~~~~
Run through 9 rows and 9 columns, each time de-incrementing
the column by one.   Display number pattern to user.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/

void pyramid(FILE *fpNumbs)
{
/* LOCAL DEFINITIONS */      
int row;
int col;
int counter;

/* STATEMENTS */

row=0;
col=0;
counter=9;

for(row=1;row<=9;row++)
{
for(col=1;col<=counter;col++)
      printf("%d ", col);
                  fprintf(fpNumbs, "%d  ", col);
      fprintf(fpNumbs, "\n");
      printf("\n");
      {
counter=counter-1;
}
}

}/* counter loop*/
output-different.bmp
0
Comment
Question by:mojeaux
  • 2
3 Comments
 
LVL 31

Expert Comment

by:Zoppo
ID: 37781302
Hi mojeaux,

you missed to put a {...} around parts of the code:
for(col=1;col<=counter;col++)
      printf("%d ", col);
                  fprintf(fpNumbs, "%d  ", col);
    ...

Open in new window

is interpreted by the compiler as
for(col=1;col<=counter;col++)
{
      printf("%d ", col);
}
                  fprintf(fpNumbs, "%d  ", col);
...

Open in new window


Change the loop to look like this:
for(row=1;row<=9;row++)
{
      for(col=1;col<=counter;col++)
      {
            printf("%d ", col);
            fprintf(fpNumbs, "%d  ", col);
            fprintf(fpNumbs, "\n");
            printf("\n");
      }
      counter=counter-1;
}

Open in new window

Hope that helps,

ZOPPO
0
 
LVL 31

Accepted Solution

by:
Zoppo earned 500 total points
ID: 37781335
Sorry, I made a mistake - the printing of 'new line' characters of course has be outside of the for loop's scope:
for(row=1;row<=9;row++)
{
      for(col=1;col<=counter;col++)
      {
            printf("%d ", col);
            fprintf(fpNumbs, "%d  ", col);
      }
      fprintf(fpNumbs, "\n");
      printf("\n");
      counter=counter-1;
}

Open in new window

ZOPPO
0
 

Author Closing Comment

by:mojeaux
ID: 37781510
Perfect... I now see my mistake... keeping the new line in the column loop in stead of the row loop.   Thanks so much.
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
post4 challenge 28 93
groupSumClump challenge 9 102
mapBully challenge 6 114
Need Multiple Versions of Python Using Virutalenvwrapper-win and Virtualenv 5 50
There is an easy way, in .NET, to centralize the treatment of all unexpected errors. First of all, instead of launching the application directly in a Form, you need first to write a Sub called Main, in a module. Then, set the Startup Object to th…
This article will show, step by step, how to integrate R code into a R Sweave document
This tutorial explains how to use the VisualVM tool for the Java platform application. This video goes into detail on the Threads, Sampler, and Profiler tabs.
The viewer will learn how to use the return statement in functions in C++. The video will also teach the user how to pass data to a function and have the function return data back for further processing.

920 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

Need Help in Real-Time?

Connect with top rated Experts

15 Experts available now in Live!

Get 1:1 Help Now