Thread: Import data of file; error message "segmentation fault"

Dear all,

the problem with my code is that I get always the error message "segmentation fault". I import data of a file and I want to use the data to do some calculations. This is not possible because of the "segmentation fault" message. The imported data look like this:

4434.853080
3638.536464
3638.779956
3639.006619

The C code is the following:

Code:

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

int main (void){

FILE *fp = fopen("file.txt","r");

//first wanted to get the number of lines
size_t nbytes;
ssize_t read;
char *my_string;
int fr=0;
while((read=getline(&my_string, &nbytes, fp)) !=-1){
        fr++;}
printf("this is the number of lines in the given file : %d \n", fr);
fclose(fp);

my_string=(char *) malloc (fr);

//here I open the file again for my calculations
FILE *fpp=fopen("file.txt","r");
int ii=0;
double *s;


s=(double *) malloc (fr);
while((read=getline(&my_string, &nbytes, fpp)) !=-1){
        my_string[ strlen(my_string)-1 ]=0;
        s[ii]=atof(my_string);
        ii++;}

fclose(fpp);
free(my_string);


return 0;
}

Here I get the segmentation fault error message. The question is why I get this message and what to do?
( I want to do further calculations and this is not possible with the segmentation fault.)