Writing a file using fopen function

Question

I wrote the following C program to write data into a file.The program got compiled properly but nothing is getting written in the file.Please suggest modifications if required.

#include <stdio.h>
#include <errno.h>

int main()
{
    int i;
    FILE *fopen(),*fp;
    fp = fopen("D:\Satish_SharedSubstance\V13.4-CT_Testing\LONGRUN_Testing\writetest.txt","w");
    /*Create a file and add text*/
    if(fp!=NULL)
    {
        fprintf(fp,"GRP \n");
        fprintf(fp,"groupname group_1 \n");
        fprintf(fp,"groupcomment group_1\n");
        fprintf(fp,"jobnet 255 \n");
        fprintf(fp,";\n");
        for (i=1;i<=255;i++)
        {
            fprintf(fp,"GNT \n");
            fprintf(fp,"jobnetname jobnet_t%d\n",i);
            fprintf(fp,"jobnetnumber %d\n",i);
            fprintf(fp,";");
        }
        /*writes data to the file*/
        fclose(fp); /*done!*/ 
    }
    else
    {
        printf("Error opening file\n");
    }
    return 0;
}

Ouch, please reformat your post to take advantage of SO's syntax highlighting (not to mention multiple lines!) — Asher Dunn, Dec 22 '09 at 05:08
So you don't get in trouble with backslashes, always write pathnames with forward slashes: `fopen("D:/Satish_SharedSubstance/V13.4-CT_Testing/LONGRUN_Testing/writetest.txt","w");` This is guaranteed to work on all platforms, even OpenVMS, MSDOS, and Windows. — wallyk, Dec 22 '09 at 05:25

score 4 · Answer 1 · answered Dec 22 '09 at 05:09

4

 fp = fopen("D:\Satish_SharedSubstance\V13.4-CT_Testing\LONGRUN_Testing\writetest.txt","w");

Try replacing "\" with "\\" in Path.

answered Dec 22 '09 at 05:09

aJ.

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and check the root of your D: drive for a file with a REALLY LONG NAME :) – John Knoeller Dec 22 '09 at 05:11

score 4 · Accepted Answer · answered Dec 22 '09 at 05:10

4

Two things:

Get rid of the *fopen() in the variable declaration.
Backslashes must be escaped in C strings. Replace each '\' with a '\\'.

answered Dec 22 '09 at 05:10

Judge Maygarden

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Abhineet · Answer 3 · 2012-06-29T06:47:50.157

0

You can do the mentioned below:-

FILE *fp = fopen("D:\\Satish_SharedSubstance\\V13.4-CT_Testing\\LONGRUN_Testing\\writetest.txt","w");

edited Jun 29 '12 at 06:47

answered Dec 22 '09 at 08:06

Abhineet

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Writing a file using fopen function

3 Answers3