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du4/program.c

@@ -0,0 +1,75 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define MAX_NAME 100
+#define MAX_ENTRIES 100
+
+typedef struct {
+    char *name;
+    int votes;
+} Student;
+
+Student *students[MAX_ENTRIES];
+int student_count = 0;
+
+Student *find_or_add(const char *name) {
+    for (int i = 0; i < student_count; i++) {
+        if (strcmp(students[i]->name, name) == 0) {
+            return students[i];
+        }
+    }
+    if (student_count < MAX_ENTRIES) {
+        Student *new_student = (Student *)malloc(sizeof(Student));
+        new_student->name = strdup(name);
+        new_student->votes = 0;
+        students[student_count++] = new_student;
+        return new_student;
+    }
+    return NULL;
+}
+
+int compare(const void *a, const void *b) {
+    Student *s1 = *(Student **)a;
+    Student *s2 = *(Student **)b;
+    return (s2->votes != s1->votes) ? (s2->votes - s1->votes) : strcmp(s1->name, s2->name);
+}
+
+void free_memory() {
+    for (int i = 0; i < student_count; i++) {
+        free(students[i]->name);
+        free(students[i]);
+    }
+}
+
+int main() {
+    char line[MAX_NAME + 10];
+    int votes;
+    char name[MAX_NAME];
+    int has_data = 0;
+
+    while (fgets(line, sizeof(line), stdin)) {
+        if (sscanf(line, "%d %99[^"]", &votes, name) != 2 || votes < 0) {
+            break;
+        }
+        Student *student = find_or_add(name);
+        if (student) student->votes += votes;
+        has_data = 1;
+    }
+
+    if (!has_data) {
+        printf("Chyba: Nebol zadany platny vstup.\n");
+        return 1;
+    }
+
+    qsort(students, student_count, sizeof(Student *), compare);
+    
+    printf("Vysledky:\n");
+    for (int i = 0; i < student_count; i++) {
+        printf("%d %s\n", students[i]->votes, students[i]->name);
+    }
+    
+    free_memory();
+    return 0;
+}
+