Making loop without size in C on File

Question

I want to calculate the sum and average on file.

for (i = 0; i > 50; i++) {
    fscanf(fp, "%d\n", &a);
    sum = a + sum;
    //printf("%d\n",a);
    count++;
}

but there is 50 as you can see that means I know how many integers that the file in it, I want to make a loop without that information. My loop should detect how many numbers in that file have.

As you can see I'm working on files.

Possible duplicate of [Read int values from a text file in C](https://stackoverflow.com/questions/4600797/read-int-values-from-a-text-file-in-c) — DeiDei, Nov 08 '18 at 22:08

score 2 · Accepted Answer · answered Nov 08 '18 at 22:19

2

Read with fscanf until you reach EOF (end of file)

while (fscanf(fp, "%d\n", &a) != EOF) {
      sum+=a;
      count++;
}

answered Nov 08 '18 at 22:19

Joonas P

86
1
5

That's not correct. Fscanf will return 0 on nondigit garbage – Antti Haapala -- Слава Україні Nov 09 '18 at 05:05
You're absolutely right that the return code should be checked to detect errors, but the question was on reading the whole file without knowing the size. – Joonas P Nov 09 '18 at 07:22

Making loop without size in C on File

1 Answers1