#include <stdio.h>

#define MAXNUMS 50

int main()
{
    FILE *fp;
    int status, n, i, a[MAXNUMS];

    if ((fp = fopen("data", "r")) == NULL) {
        perror("data");
        return 1;
    }
    for (n = 0; n < MAXNUMS && (status = fscanf(fp, "%d", &a[n])) == 1; n++)
        ;
    if (status == 0) {
        fprintf(stderr, "Non-numeric data\n");
        return 1;
    }

    sort(n, a);  /* not shown here */

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

    return 0;
}