Thread: funny output at the end of textfile after sort.

Hi everyone. I am almost finished with this assignment but I am getting some extra numbers at the very end of my output file after the integers are sorted. the output file looks like:

Code:

0
1
2
3
.
.
.
98
99
1297040174

My main looks like this:

Code:

#include "header.h"

int main(int argc, const char *argv[]) {
    int i = 0, N = 0, *array, k, dummy;
    //hrtime_t start, end;

    FILE *input;
    FILE *output;

    input = fopen("100_random.txt", "r");
    if (input == NULL) {
        fprintf(stderr, "Cannot open file for reading\n");
        exit(EXIT_FAILURE);
    }

    while (!feof(input)) {
        fscanf(input, "%d", &dummy);
        N++;
}
    if (fclose(input)) {
        fprintf(stderr, "Error closing the file.\n");
        exit(EXIT_FAILURE);
    }

    array = (int*) malloc(N* sizeof(int));
    if(array == NULL)
        printf("Error - could not allocate an array.\n");
    else {
        input = fopen("100_random.txt", "r");
        for(k = 0; k < N; k++)
            fscanf(input, "%d", &(array[k]));
        fclose(input);
    }

     //start = gethrtime();
     //insertion_sort(array,i);
     //end = gethrtime();
     //printf("The average time for the insertion_sort function was: %11d nsec.\n", (end - start)/n);
     //selection_sort(array, i);
     bubble_sort(array, k);
     //mod_bubble_sort(array, i);
     //quick_sort(array, 0, i - 1);
     //merge_sort(array, 0, i -1);

    output = fopen("out.txt", "w+");
    for (i = 0; i < N; i++){

    fprintf(output, "%d\n", array[i]);
}

    free (array);
    array = NULL;

    return (EXIT_SUCCESS);
}

I have to sort 3 different sized arrays:
1) 100 ints
2) 1000 ints
3) 10000 ints

I noticed I do NOT get the extra numbers at the end of the 10000 int sort. Just the 100 and 1000.
I have to say, that the output is not do to the sorting functions. It happened when I just wrote to the file NOT using the sort funtions.

Anyone have any idea how to solve this and what might be wrong?

The sort functions should be correct as I have tested them. But if you need to see them, let me know.

UPDATE: I ran this on our unix system and I do NOT get the extra line with numbers on it. I'm thinking it might be CodeBlocks. If I am incorrect, I am still willing to listen to reasons and solutions.

Originally Posted by csharp100

Adak, can you show me an example as it pertains to what I have please? I would appreciate it.

Make the file:
Open a command window: <shift key> + <window key> + <right mouse button> select "open command window here"

then type: copy con data.txt <enter>
1<enter>
2<enter>
3<enter>
4<enter>
5<enter>
<ctrl+z> <enter>

Then compile and run this

Code:

#include <stdio.h>

int main(void) {
   int i;
   FILE *fp=fopen("data.txt","r");
   if(fp) {
      while(fscanf(fp, "%d",&i)> 0) { 
         printf("%d\n",i);
      }
       fclose(fp);
   }
   printf("\n");
   return 0;
}

The above while loop replaces your programs file loop, beginning on your line #16.

You're welcome. I don't see gethrtime listed for Pelles C. Where did you run into it? Your post is not showing in the C forum. What forum did you post it in?