du2 - 2

du2/program.c

@@ -11,19 +11,59 @@ struct pizza {
 	float price;
 };
 
+//funkcia na nacitanie jednej polozky
 int read_pizza(struct pizza *item) {
 	char line1[LINESIZE];
 	char line2[LINESIZE];
 
+	//nazov
 	if (!fgets(line1, LINESIZE, stdin)) return 0;
 	line1[strcspn(line1, "\n")] = 0;
+	if (strlen(line1) == 0) return 0;
+	
+	//cena
+	if (!fgets(line2, LINESIZE, stdin)) return 0;
+	line2[strcspn(line2, "\n")] = 0;
 
 	float value;
-	if (sscanf(line2, "%f", &value) != 1
+	if (sscanf(line2, "%f", &value) != 1 || value == 0.0f) {
+		return 0;
+	} 
+
+	strcpy(item->name, line1);
+	item->prize = value;
+	return 1;
+}
+
+//porovnanie pre qsort
+int compare_pizza(const void *a, const void *b){
+	const struct pizza *pa = (const struct pizza *)a;
+	const struct pizza *pb = (const struct pizza *)b;
+
+	if (pa->prize < pb->prize) return -1;
+	if (pa->prize > pb->prize) return 1;
+
+	return strcmp(pa->name, pb->name);
 }
 
 
 int main() {
+	struct pizza list[MAXITEMS];
+	int count = 0;
+	
+	//nacitanie listka
+	while (count < MAXITEMS && read_pizza(&list[count])){
+		count++;
+	}
 
-    return 0;
+	//triedenie
+	qsort(list, count, sizeof(struct pizza), compare_pizza);
+
+	//vypis listka
+	for (int i = 0; i < count; i++){
+		printf("%s\n", list[i].name);
+		printf("%s\n", list[i].prize);
+	}
+
+	return 0;
 }