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Full Discussion: why I am gettin a segmentation fault when using pointers
Top Forums Programming why I am gettin a segmentation fault when using pointers Post 302165513 by user_prady on Friday 8th of February 2008 03:55:39 AM
Old 02-08-2008
Power why I am gettin a segmentation fault when using pointers
Hello Friends,

Here is my programme.
Code:
#include <stdio.h>
 
FILE* fileopen();
void read_line(FILE*);
  
void read_line(FILE *fh){
              char s[200];
              double *input_re_see, *input_im_see;
              double input_re, input_im;

if( fgets(s,sizeof(s),fh) != NULL) { 
    sscanf(s,"%lf %lf ", &input_re, &input_im);
     
   // *input_re_see = input_re;
   // *input_im_see = input_im;
   // printf("%f  %f ", *input_re_see, *input_im_see);
 
    printf("input_re= %lf, input_im= %lf ", input_re, input_im );
    printf("%s ",s);
  }
}
FILE* fileopen(){ 
          void *file = fopen("real.dat", "r");
        if(file == NULL){
                printf("Error opening file:");
        }
       return file;
}
int main(void) { 
        
           FILE   *fh;
           int i; 
              fh = fileopen();
              for(i =0 ;i < 50 ; i++){
                 read_line(fh);
              }
 
              return 0;
}

I don't why I am gettin segmentation fault when I remove these comments..

WHat I am doing wrong with the pointer that causes segmentation fault,
Please help..

Regards,
Prady
Last edited by user_prady; 02-08-2008 at 05:27 AM..
 

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LEARN ABOUT DEBIAN

tv_split

TV_SPLIT(1p)						User Contributed Perl Documentation					      TV_SPLIT(1p)

NAME

       tv_split - Split XMLTV listings into separate files by date and channel.

SYNOPSIS

       tv_split --output TEMPLATE [FILE...]

DESCRIPTION

       Read XMLTV listings and split them into some number of output files.  The output file chosen for each programme is given by substitutions
       on the filename template supplied.  You can split listings by time and by channel.

       The TEMPLATE is a filename but substitutions are applied: first %channel is replaced with the id of a programme's channel, and then
       Date::Manip substitutions (which broadly follow date(1)) are applied based on the start time of each programme.	In this way each programme
       is written to a particular output file.	When an output file is created it will also contain all the channel elements from the input.

       One or more input files can be given; if more than one then they are concatenated in the same way as tv_cat.  If no input files are given
       then standard input is read.

EXAMPLE

       Use "tv_split --output %channel-%Y%m%d.xml" to separate standard input into separate files for each day and channel.  The files will be
       created with names like bbc1.bbc.co.uk-20020330.xml.

SEE ALSO

       Date::Manip(3).

AUTHOR

       Ed Avis, ed@membled.com.

perl v5.14.2							    2004-01-20							      TV_SPLIT(1p)
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