pvjc24/cv5/program.c

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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define MAX_STUDENTS 100
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#define MAX_NAME_LENGTH 50
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struct Student {
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char name[MAX_NAME_LENGTH];
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int votes;
};
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// Funkcia načíta študentov zo štandardného vstupu a sčíta ich hlasy
int read_and_sum_votes(struct Student students[], int max_students) {
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int count = 0;
while (count < max_students) {
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int votes;
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char name[MAX_NAME_LENGTH];
if (scanf("%d %[^\n]", &votes, name) != 2) {
break; // Koniec vstupu alebo chyba
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}
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// Hľadáme, či už sme tento študent videli
int found = 0;
for (int i = 0; i < count; i++) {
if (strcmp(students[i].name, name) == 0) {
// Ak sme študenta našli, pridáme mu hlasy
students[i].votes += votes;
found = 1;
break;
}
}
// Ak sme študenta ešte nevideli, pridáme ho do zoznamu
if (!found) {
strcpy(students[count].name, name);
students[count].votes = votes;
count++;
}
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// Zbavíme sa koncového znaku nového riadku z bufferu vstupu
getchar();
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}
return count;
}
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// Funkcia na porovnávanie študentov pre qsort
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int compare(const void *p1, const void *p2) {
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const struct Student *s1 = (const struct Student *)p1;
const struct Student *s2 = (const struct Student *)p2;
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// Porovnanie podľa počtu hlasov, v prípade rovnakého počtu podľa mena
if (s1->votes != s2->votes) {
return s2->votes - s1->votes;
} else {
return strcmp(s1->name, s2->name);
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}
}
int main() {
struct Student students[MAX_STUDENTS];
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int count = read_and_sum_votes(students, MAX_STUDENTS);
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if (count == 0) {
printf("Chyba: Nepodarilo sa načítať žiadne dáta.\n");
return 1;
}
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// Triedenie študentov
qsort(students, count, sizeof(struct Student), compare);
// Výpis výsledkov
printf("Vysledky:\n");
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for (int i = 0; i < count; i++) {
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printf("%d %s\n", students[i].votes, students[i].name);
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}
return 0;
}