pvjc24/cv10/program.c

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

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

int main() {
    int count;
    char buffer[100];
    char **applications;
    int i, j;

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

    applications = (char **)malloc(count * sizeof(char *));
    if (!applications) {
        printf("Chyba pri alokacii pamate\n");
        return 1;
    }

    i = 0;
    while (i < count && fgets(buffer, sizeof(buffer), stdin)) {
        int len = strlen(buffer);
        if (len > 0 && buffer[len - 1] == '\n') { // Remove newline character if present
            buffer[len - 1] = '\0';
        }
        int found = 0;
        for (j = 0; j < i; j++) {
            if (strcmp(applications[j], buffer) == 0) {
                found = 1;
                break;
            }
        }
        if (!found) {
            applications[i] = strdup(buffer);
            i++;
        }
    }

    if (i!= count) {
        printf("Nespravny vstup\n");
        for (j = 0; j < i; j++) {
            free(applications[j]);
        }
        free(applications);
        return 1;
    }

    if (i == 0) {
        printf("Ziadne prihlasky\n");
        free(applications);
        return 1;
    }

    // Sort the applications alphabetically
    qsort(applications, i, sizeof(char *), compare_names);

    printf("Prijati studenti:");
    for (j = 0; j < i; j++) {
        printf("\n%s", applications[j]);
    }

    // Free allocated memory
    for (j = 0; j < i; j++) {
        free(applications[j]);
    }
    free(applications);

    return 0;
}