89 lines
2.5 KiB
C
89 lines
2.5 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#define MAX_SIZE 100
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#define MAX_STUDENTS 100
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// Štruktúra pre reprezentáciu študenta
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struct Student {
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char name[MAX_SIZE];
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int votes;
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};
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// Porovnávacia funkcia pre triedenie študentov
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int compare(const void *p1, const void *p2) {
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const struct Student *s1 = (const struct Student *)p1;
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const struct Student *s2 = (const struct Student *)p2;
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// Porovnanie počtu hlasov
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if (s1->votes != s2->votes) {
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return s2->votes - s1->votes; // Zoradenie zostupne podľa hlasov
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}
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// Ak majú rovnaký počet hlasov, zoradíme lexikograficky podľa mena
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return strcmp(s1->name, s2->name);
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}
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// Načíta študentov zo súboru do pola
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int read_students_from_file(struct Student students[], int max_students) {
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FILE *file = fopen("nazov_suboru.txt", "r");
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if (file == NULL) {
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perror("Chyba pri otváraní súboru");
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return -1;
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}
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int num_students = 0;
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char line[MAX_SIZE];
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while (fgets(line, sizeof(line), file) != NULL) {
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int votes;
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char name[MAX_SIZE];
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if (sscanf(line, "%d %99[^\n]", &votes, name) == 2) {
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strcpy(students[num_students].name, name);
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students[num_students].votes = votes;
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num_students++;
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if (num_students >= max_students) {
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break; // Prekročený maximálny počet študentov
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}
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}
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}
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fclose(file);
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return num_students;
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}
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// Pridá nového študenta do súboru
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void add_student_to_file(const struct Student *student) {
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FILE *file = fopen("nazov_suboru.txt", "a");
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if (file == NULL) {
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perror("Chyba pri otváraní súboru");
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return;
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}
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fprintf(file, "%d %s\n", student->votes, student->name);
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fclose(file);
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}
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int main() {
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struct Student students[MAX_STUDENTS];
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int num_students = read_students_from_file(students, MAX_STUDENTS);
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if (num_students == -1) {
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return 1; // Chyba pri čítaní zo súboru
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}
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// Pridáme nového študenta
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struct Student new_student;
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strcpy(new_student.name, "Novy Student");
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new_student.votes = 5;
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add_student_to_file(&new_student);
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// Zoradíme študentov podľa počtu hlasov
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qsort(students, num_students, sizeof(struct Student), compare);
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// Vypíšeme výsledky
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printf("Výsledky:\n");
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for (int i = 0; i < num_students; i++) {
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printf("%d %s\n", students[i].votes, students[i].name);
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}
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return 0;
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}
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