pvjc24/cv5/program.c

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

#define SIZE 100

struct student {
    char name[SIZE];
    int votes;
};

int compare(const void* p1, const void* p2){
    struct student* s1 = (struct student*)p1;
    struct student* s2 = (struct student*)p2;
    
    if (s1->votes != s2->votes)
        return s2->votes - s1->votes;
    else
        return strcmp(s1->name, s2->name);
}

int find_student(struct student* students, int size, const char* name){
    for (int i = 0; i < size; ++i) {
        if (strcmp(students[i].name, name) == 0) {
            return i;
        }
    }
    return -1;
}

int main() {
    struct student database[SIZE];
    memset(database, 0, SIZE * sizeof(struct student));
    int size = 0;

    char line[SIZE];
    while (fgets(line, SIZE, stdin)) {
        char* end = NULL;
        int votes = strtol(line, &end, 10);
        if (votes == 0) {
            fprintf(stderr, "Nepodarilo␣nacitat␣nic\n");
            break;
        }
        if (*end != ' ') {
            fprintf(stderr, "Nepodarilo␣nacitat␣nic\n");
            break;
        }
        char name[SIZE];
        strcpy(name, end + 1);
        name[strlen(name) - 1] = '\0';

        int index = find_student(database, size, name);
        if (index == -1) {
            strcpy(database[size].name, name);
            database[size].votes = votes;
            size++;
        } else {
            database[index].votes += votes;
        }
    }

    qsort(database, size, sizeof(struct student), compare);

    printf("Vysledky:\n");
    for (int i = 0; i < size; ++i) {
        printf("%d %s\n", database[i].votes, database[i].name);
    }

    return 0;
}