Thread: Beginner problem with counting lines in a file

Hello, i'm just trying the challenge set on this site where i have to read a file and count the number of lines in this file. I've read several tutorials and FAQs on file handling but i still can't work out where i'm going wrong (it will be an extrememly simple error) I have the following code so far:

Code:

#include <stdio.h>

int main(int argc, char* argv[])
{
    int line = 0, c = 0;
    //char c;
    
    FILE *myfile_in;
    myfile_in = fopen(argv[1], "r");
    
    if (argc!=2)
    {
        printf("ERROR: Input should be in form fileio filename.txt");
    }
    
    if (myfile_in == NULL)
    {
       printf("ERROR: Invalid filename supplied ( %s )", argv[1]);
        return 1;
    }
    
    while(fscanf(myfile_in, "%d", &c) != EOF )
    {
        if (fscanf(myfile_in,"%d", &c) == '\n')
        {
            line++;
        }
    }
    fclose(myfile_in);           
    
    printf("Lines in file: %d", line);
    return 0;
}

The problem is that it says line is 0 every time. The text file contains a series of numbers on different lines, eg.

Code:

15
20
25
30

As usual no doubt i'm doing something totally wrong, so any input or tips/pointers are greatly appreciated. thanks.

I updated the code involved in counting the lines to:

Code:

    while(fgets(buf, sizeof(buf), myfile_in) != NULL)
    {
            line++;
    }

and the program now works (albeit a little slowly, damn my rubbish pc)

Thanks