What's my mistake when I am trying to work with files in C?

Asked Dec 11 '22 at 15:12

Active Dec 11 '22 at 15:45

Viewed 46 times

I am a beginner in programming and I need to find out palindromes in the first file and put them into the second one. I have a Thread 1: EXC_BAD_ACCESS (code=1, address=0x68), when I am trying to start the code

#include <stdio.h>
#include <string.h>
 int main ()
 {
     char line[255];
     unsigned long k;
     int i;
     int flag = 1;
     FILE *file = fopen("1zad.txt", "r");
     FILE *new = fopen("new1.txt", "a");
     while(!feof(file) && !ferror(file))
     {
         fgets(line, 255, file);
         k = strlen(line);
         for (i = 0;i < k/2;i++)
         {
             if(line[i]!=line[k-1-i]){
                 flag = 0;
             }
         }
         if(flag == 1){
             fputs(line, new);
         }
     }
     fclose(file);
     fclose(new);
     return 0;
 }

it underlines "!feof", text files are available and near the program file. i have no ideas what is going wrong

edited Dec 11 '22 at 15:45

Steve Summit

45,437
7
70
103

asked Dec 11 '22 at 15:12

a11ex

You are reading 255 bytes from a file and calling it "like" but it's not a line. It's 255 bytes. It won't have a length. Did you mean to read one line from the file? – mousetail Dec 11 '22 at 15:25
I need to read some lines from the file – a11ex Dec 11 '22 at 15:31
Then read lines, not entire 255 byte chunks. Make sure to leave space for the 0 string terminator – mousetail Dec 11 '22 at 15:32
2

See also [Why is “while( !feof(file) )” always wrong?](https://stackoverflow.com/questions/5431941) – Steve Summit Dec 11 '22 at 15:44
ok, I will check it – a11ex Dec 11 '22 at 15:45

What's my mistake when I am trying to work with files in C?

0 Answers0