pvjc24/cv10/program.c

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

// Function to compare strings for qsort
int compare(const void *a, const void *b) {
    return strcmp(*(const char **)a, *(const char **)b);
}

int main() {
    int max_students;
    char **applications = NULL;
    char buffer[100];
    int num_applications = 0;

    // Read the maximum number of students to accept
    if (scanf("%d", &max_students) != 1 || max_students <= 0) {
        puts("Nespravny vstup");
        return 1;
    }

    // Allocate memory for the list of applications
    applications = (char **)malloc(max_students * sizeof(char *));
    if (applications == NULL) {
        puts("Chyba alokacie pamate");
        return 1;
    }

    // Read the applications
    while (num_applications < max_students && fgets(buffer, sizeof(buffer), stdin) != NULL && buffer[0] != '\n') {
        size_t len = strlen(buffer);
        if (buffer[len - 1] == '\n') {
            buffer[len - 1] = '\0'; // Remove the newline character
        }
        applications[num_applications] = strdup(buffer);
        if (applications[num_applications] == NULL) {
            puts("Chyba alokacie pamate");
            return 1;
        }
        num_applications++;
    }

    // Check if any applications were read
    if (num_applications == 0) {
        puts("Ziadne prihlasky");
        return 1;
    }

    // Sort the applications alphabetically
    qsort(applications, num_applications, sizeof(char *), compare);

    // Print the accepted students
    puts("Prijati studenti:");
    for (int i = 0; i < num_applications; i++) {
        printf("%s\n", applications[i]);
        free(applications[i]); // Free memory for each application
    }

    free(applications); // Free the array of applications

    return 0;
}