90 lines
2.4 KiB
C
90 lines
2.4 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#define SIZE 100
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struct student {
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char name[SIZE];
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int votes;
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};
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// comparison function for sorting students
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int compare(const void *a, const void *b) {
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struct student *student_a = (struct student *) a;
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struct student *student_b = (struct student *) b;
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if (student_a->votes > student_b->votes) {
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return -1;
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} else if (student_a->votes < student_b->votes) {
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return 1;
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} else {
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// if the votes are the same, compare names
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return strcmp(student_a->name, student_b->name);
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}
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}
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int main() {
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struct student students[SIZE];
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int size = 0;
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// read student data from standard input
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while (1) {
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char line[SIZE];
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memset(line, 0, SIZE);
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char *r = fgets(line, SIZE, stdin);
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// check if the line is empty or just contains newline character
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if (r == NULL || (r[0] == '\n' && strlen(r) == 1)) {
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// end of input
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break;
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}
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// check if the line was truncated
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if (strlen(line) == SIZE - 1 && line[SIZE - 2] != '\n') {
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// line was truncated, handle the error
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fprintf(stderr, "Error: input line is too long\n");
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return 1;
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}
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// parse the string and extract number of votes and student name
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int votes;
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char name[SIZE];
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if (sscanf(line, "%d %[^\n]", &votes, name) != 2) {
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// error, input was not in expected format
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// print error message and exit
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fprintf(stderr, "Error: invalid input format\n");
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return 1;
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}
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// check if this student already exists
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int found = 0;
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for (int i = 0; i < size; i++) {
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if (strcmp(students[i].name, name) == 0) {
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// add votes to existing student
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students[i].votes += votes;
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found = 1;
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break;
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}
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}
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// if the student was not found, add a new student
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if (!found) {
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strcpy(students[size].name, name);
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students[size].votes = votes;
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size++;
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}
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}
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// sort students based on their votes
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qsort(students, size, sizeof(struct student), compare);
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// print the results
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printf("Vysledky:\n");
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for (int i = 0; i < size; 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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