fread

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

int main()
{
    int a[5], i;
    FILE *fp;

    if((fp = fopen("input.txt", "rb")) == NULL)
    {
        printf("Error opening file.\n");
        exit(1);
    }

    if(fread(a, sizeof a, 1, fp) != 1)
    {
        printf("Error reading file\n");
        exit(2);
    }

    fclose(fp);

    for(i = 0; i < 5; i++)
        printf("%d\n", a[i]);

    return 0;

}