pvjc24/cv5/program.c

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C
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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
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#define SIZE 100
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typedef struct {
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char* meno;
int hlasov;
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} Student;
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int find_student_index(Student* students, int num_students, const char* meno) {
for (int i = 0; i < num_students; i++) {
if (strcmp(students[i].meno, meno) == 0) {
return i; // Nájdený študent
}
}
return -1; // Študent neexistuje
}
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int main() {
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char line[SIZE];
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int num_students = 0;
Student* students = NULL;
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while (fgets(line, SIZE, stdin) != NULL) {
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char* endptr;
int hlasov = strtol(line, &endptr, 10);
if (endptr == line || *endptr != ' ' || hlasov < 0) {
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printf("CHYBA: Neplatny zapis na riadku.\n");
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return 1;
}
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endptr++; // Preskočenie medzery
// Preskočenie medzier za počtom hlasov
while (*endptr == ' ') {
endptr++;
}
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// Zistenie dĺžky mena
int len = strlen(endptr);
if (len == 0 || endptr[len - 1] == '\n') {
printf("CHYBA: Neplatny zapis na riadku.\n");
return 1;
}
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// Alokácia pamäte pre meno študenta
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char* meno = malloc(len + 1);
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if (meno == NULL) {
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printf("CHYBA: Nepodarilo sa alokovať pamäť.\n");
return 1;
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}
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// Kopírovanie mena
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memcpy(meno, endptr, len);
meno[len] = '\0'; // Nulový znak na koniec mena
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// Zistiť, či študent už existuje v databáze
int index = find_student_index(students, num_students, meno);
if (index == -1) {
// Študent neexistuje, pridáme ho do databázy
students = realloc(students, (num_students + 1) * sizeof(Student));
if (students == NULL) {
printf("CHYBA: Nepodarilo sa alokovať pamäť.\n");
return 1;
}
students[num_students].meno = meno;
students[num_students].hlasov = hlasov;
num_students++;
} else {
// Študent existuje, zvýšime počet hlasov
students[index].hlasov += hlasov;
free(meno); // Uvoľníme meno, pretože sme ho nevyužili
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}
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}
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// Výpis výsledkov
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printf("Vysledky:\n");
for (int i = 0; i < num_students; i++) {
printf("%d %s\n", students[i].hlasov, students[i].meno);
}
// Uvoľnenie pamäte
for (int i = 0; i < num_students; i++) {
free(students[i].meno);
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}
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free(students);
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return 0;
}