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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

itksnap

ITKSNAP(1)							   User Commands							ITKSNAP(1)

NAME

       itksnap - semi-automatic segmentation of structures in 3D images

SYNOPSIS

       itksnap [options] [grey_image]

DESCRIPTION

       SNAP  provides semi-automatic segmentation of structures in medical images (e.g.  magnetic resonance images of the brain) using active con-
       tour methods, as well as manual delineation and image navigation.  Noteworthy features are:

       * Linked cursor for seamless 3D navigation

       * Manual segmentation in three orthogonal planes at once

       * Support for many different 3D image formats, including NIfTI

       * Support for concurrent, linked viewing and segmentation of multiple images

       * Limited support for color images (e.g., diffusion tensor maps)

       * 3D cut-plane tool for fast post-processing of segmentation results

OPTIONS

       --grey, -g FILE
	      Load greyscale image FILE (optional)

       --segmentation, -s FILE
	      Load segmentation image FILE

       --labels, -l FILE
	      Load label description file FILE

       --rgb FILE
	      Load RGB image FILE (as overlay if combined with -g)

AUTHOR

       ITK-SNAP was written by Paul A. Yushkevichi, Hui Zhang, Casey Goodlett, Timothy Burke, Nicholas	Tustison,  Guido  Gerig,  Silvio  Turello,
       Joachim	Schlegel,  Gabor Szekely, Chris Wynn, Arun Neelamkavil, David Gregg, Eric Larsen, Sanjay Sthapit, Sean Ho, Ashraf Farrag, Amy Hen-
       derson, Robin Munesato, Ming Yu, Nathan Moon, Thorsten Scheuermann, Konstantin Bobkov, Nathan Talbert, Yongjik Kim, Pierre Fillard,  Daniel
       S. Fritsch, Stephen R. Aylward

       This manual page was written by Michael Hanke <michael.hanke@gmail.com>, for the Debian project (but may be used by others).

SEE ALSO

       Manual and tutorial: http://itksnap.org

Michael Hanke							    April 2010								ITKSNAP(1)
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