writing structure to a file

[prashant.khade1623]

Hi

I am trying ti write a structure to a file, but I am getting
segmentation fault. Below is my program

#include<stdio.h>
main()
{
FILE *fp;
struct student {
int age;
char name[19];
char school[15];
};

struct student s1={25,"khade","KVOFPM"};
struct student s2={25,"khade","KVOFPM"};

fp = fopen("khade","r+");

fwrite(&s1,sizeof(struct student ),1,fp);
fwrite(&s2,sizeof(struct student ),1,fp);


}


Can you tell me why I am getting the error.
Also I want to read from the file. how can I do that ?

Thanks in advance

 

[prashant.khade1623]

(e-mail address removed) said:





if(fp == NULL)
{
  printf("Aha! THAT's why.\n");

--
Richard Heathfield <http://www.cpax.org.uk>
Email: -http://www. +rjh@
Google users: <http://www.cpax.org.uk/prg/writings/googly.php>
"Usenet is a strange place" - dmr 29 July 1999

I am not able to open the file. What can be the reason for that ?

 

[Pradeep]

Hi
In your program
file is opening in 'r+' mode
'r+' opens the file for both reading and writing.
but it won't check whether file is there or not.
(i.e., it won't create new file)
in that case you need to create the file in 'w' mode
that will solve your problem.
or if you don't want to change your code, then you need to create a
blank file in the current directory with the same name you are opening
the file in 'r+' mode(crete a file blank file "khade" in the current
directory) then your code should work.