pvjc24/cv10/program.c

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

#define MAX_NAME_LENGTH 100

int compare(const void *a, const void *b) {
    const char *name1 = *(const char **)a;
    const char *name2 = *(const char **)b;
    return strcmp(name1, name2);
}

int main() {
    int maxStudents;
    char name[MAX_NAME_LENGTH];
    char **names = NULL;
    int count = 0;
    int capacity = 0;

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

    
    while (fgets(name, MAX_NAME_LENGTH, stdin)) {
        if (name[0] == '\n') break;
        name[strcspn(name, "\n")] = '\0'; 
        
       
        if (count >= capacity) {
            capacity = capacity == 0 ? 4 : capacity * 2;
            names = realloc(names, capacity * sizeof(char *));
            if (names == NULL) {
                perror("Failed to reallocate memory");
                return 1;
            }
        }
        
       
        int isDuplicate = 0;
        for (int i = 0; i < count; i++) {
            if (strcmp(names[i], name) == 0) {
                isDuplicate = 1;
                break;
            }
        }
        
        if (!isDuplicate) {
            names[count] = strdup(name);
            if (names[count] == NULL) {
                perror("Failed to duplicate name");
                return 1;
            }
            count++;
        }
    }
    
    if (count == 0) {
        puts("Ziadne prihlasky");
        return 1;
    }
    
   
    qsort(names, count, sizeof(char *), compare);

   
    puts("Prijati studenti:");
    int limit = count < maxStudents ? count : maxStudents;
    for (int i = 0; i < limit; i++) {
        puts(names[i]);
    }

   
    if (count > maxStudents) {
        puts("Neprijati studenti:");
        for (int i = maxStudents; i < count; i++) {
            puts(names[i]);
        }
    }

  
    for (int i = 0; i < count; i++) {
        free(names[i]);
    }
    free(names);

    return 0;
}