Phonebook - CSV file sorting

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

typedef struct {
    int id;
    char firstname[64], surname[64], address[256], phonenr[32];
} tPerson;

enum {
    ID, FIRSTNAME, SURNAME, ADDRESS, PHONENUMBER
} sortBy = PHONENUMBER;

int comparePersons(const void *p1, const void *p2) {
    const tPerson * c1 = p1, *c2 = p2;
    switch (sortBy) {
    case ID:
        return c1->id - c2->id;
        break;
    case FIRSTNAME:
        return strcmp(c1->firstname, c2->firstname);
        break;
    case SURNAME:
        return strcmp(c1->surname, c2->surname);
        break;
    case ADDRESS:
        return strcmp(c1->address, c2->address);
        break;
    case PHONENUMBER:
        return strcmp(c1->phonenr, c2->phonenr);
        break;
    }
    return 0;
}

int main(int argc, char *argv[]) {
    tPerson array[1000];
    tPerson demo_arr[] = {
            { 0, "Frantisek", "Dobrota", "Blizka 23, 11100 Praha", "777666555444" },
            { 1, "Anna", "Peprna", "Daleka 1, Plzen", "606055444" },
            { 2, "Viliam", "Razny", "Hluboka 3", "257000111" },
            { 3, "Zdenek", "Pomaly", "Krizova 5", "800333444" },
            { 4, "Rene", "Drobny", "Vysehradska 3", "774888999" },
            { 5, "Brona","Chalupova", "Mladcova 4", "356222333" },
            { 6, "Cyril", "Metodej", "U Zahradek 123", "456321000" },
        { 7, "Adam", "Doe", "Riverside 111", "956321000" }
    };
    if (argc>1)     //processing command line parameters here
        switch (argv[1][0]) {
            case 'i': sortBy = ID; break;
            case 'f': sortBy = FIRSTNAME; break;
            case 's': sortBy = SURNAME; break;
            case 'a': sortBy = ADDRESS; break;
            case 'p': sortBy = PHONENUMBER; break;
            default:
                printf("1. parameter is a character specifying which column will be the sorting key\n"
                        "i: ID, f: first name, s: surname, a: address, p: phone number\n");
        }
    char buffer[200];
    int i=0;
    puts("Please enter content of a CSV file, end by CTRL+Z");
    while (fgets(buffer, 200, stdin)!=NULL && i<1000) {
        int status=sscanf(buffer, "%d;%[^;];%[^;];%[^;];%[^;\n];",
               &array[i].id, array[i].firstname, array[i].surname,
               array[i].address, array[i].phonenr);
        if (status==5) i++;
        else {
            printf("Error on line %d.: %s\n", i, buffer);
        }
    }
    int count = i;
    qsort(array, count, sizeof(tPerson), comparePersons); // sorting here

    for (int i=0; i<count; i++)  //printing the results
        printf("%d; %s; %s; %s; %s\n", array[i].id, array[i].firstname, array[i].surname, array[i].address, array[i].phonenr);
    exit(EXIT_SUCCESS);
}