pvjc24/cv10/program.c

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

#define MAX_STUDENTS 100
#define NAME_SIZE 50

int compare_names(const void *a, const void *b) {
    const char **name_a = a;
    const char **name_b = b;
    return strcmp(*name_a, *name_b);
}

int main() {
    int max_students, num_accepted = 0, num_students = 0;
    char names[MAX_STUDENTS][NAME_SIZE];
    char temp_name[NAME_SIZE];

    scanf("%d", &max_students);
    if (max_students <= 0 || max_students > MAX_STUDENTS) {
        printf("Nespravny vstup\n");
        return 1;
    }

    memset(names, 0, sizeof(names));

    while (fgets(temp_name, sizeof(temp_name), stdin) != NULL && num_accepted < max_students) {

        int i, found = 0;

        for (i = 0; i < num_accepted; i++) {
            if (strcmp(names[i], temp_name) == 0) {
                found = 1;
                break;
            }
        }

        if (!found) {
            strcpy(names[num_accepted], temp_name);
            num_accepted++;
        }
        num_students++;
    }

    // sort the names by alphabet
    qsort(names, num_accepted, sizeof(char*) * NAME_SIZE, compare_names);

    if (num_accepted == 0) {
        printf("Ziadne prihlasky");
    } else {
        printf("Prijati studenti:\n");
        for (int i = 0; i < num_accepted; i++) {
            printf("%s", names[i]);
        }
    }

    return 0;
}