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Makefile

@@ -0,0 +1,15 @@
+CFLAGS= -std=c99 -g
+
+all: pizza2
+
+%.o: %.c
+	gcc -c -o $@ $< $(CFLAGS)
+
+pizza2: main.o pizza2.o
+	gcc main.o pizza2.o -o pizza2
+clean:
+	rm *.o pizza2 test
+test: pizza2.c tests/test.c
+	gcc pizza2.c tests/test.c tests/unity.c -Itests -o test
+	./test
+

main.c

@@ -0,0 +1,15 @@
+#include "pizza2.h"
+#include <stdio.h>
+
+int main(){
+    struct pizza list[LIST_SIZE];
+
+
+    int list_size = read_pizza_list(list,LIST_SIZE);
+    
+
+    sort_pizza(list,list_size);
+    print_pizza_list(list,list_size);
+    return 0;
+}
+

pizza2.c

@@ -0,0 +1,161 @@
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include "pizza2.h"
+
+
+/**
+ * Nacita jeden riadok z klavesnice vratane konca riadka.
+ *
+ * @arg line  Pole kam sa ma ulozit vysledok
+ * @arg size  velkost pola s vysleddkom.
+ * @return Funkcia vrati EOF ak nastal koniec vstupu  vstupu alebo pocet nacitanych znakov.
+ */
+int read_line(char* line, int size) {
+
+	for(int i=0; i<size; i++) {
+
+		char c = getchar();
+
+		if (c=='\n')
+		{
+			line[i-1] = '\n';
+			line[i] = '\0';
+			return i; 
+		}
+		else if (c==EOF)
+		{
+			line[i] = '\0';
+			return EOF;
+		}
+
+		else line[i] = c;
+	}
+
+	line[size-1] = '\0';
+
+    return size-1;
+}
+
+/**
+ * Naciata informacie o jednej pizzi z klavesnice.
+ * Prvy riadok je nazov pizze ako retazec. Ak je prevy riadok prazdny, zaznam o pizzi je neplatny.
+ * Druhy riadok je cena pizze akocislo s desatinnou bodkou. 
+ *
+ * Pozor - spravanie funkcie nie je definovane v pripade, ze pouzivatel zada neocakavany vstyup, napr.
+ * pismena namiesto cisla.
+ *
+ * @arg item smernik kam sa ma nacitat info o pizzi
+ * @return V pripade, ze pizza nebola nacitana uspesne, funkcia vrati nulu. Inak vrati jednotku.
+ *
+ */
+int read_pizza(struct pizza* item){
+	int res = read_line(item->name,LINE_SIZE);
+    if (res == EOF || strlen(item->name) == 0){
+    	return 0;
+    }
+    char buffer[LINE_SIZE];
+    res = read_line(buffer,LINE_SIZE);
+    if (res == EOF){
+        return 0;
+    }
+    res = sscanf(buffer,"%f",&item->prize);
+    if (res != 1){
+        return 0;
+    }
+	return 1;
+}
+
+/**
+ * Nacita jedalny listok zo suboru. Zaznamy o jedlach su v textovom formate ulozene za sebou.
+ * Zoznam je ukonceny neplatnou pizzou }napr. prazdny riadok.|
+ *
+ * @arg pole do ktoreho sa ma naxitat
+ * @arg size velkost pola
+ * @return pocet nacitanych poloziek.
+ *
+ */
+int read_pizza_list(struct pizza* list, int size){
+   
+	for (int i = 0; i < size; i++)
+	{	
+
+		if (read_pizza(&list[i])!=1)
+		{
+			return i;
+		}
+	}
+
+    return size;
+}
+
+/**
+ * Vypise jedalny listok na obrazovku. Vypis by mal byt v takom formate, aby sa dal nacitat pomocou funkcie
+ * read_pizza_list().
+ *
+ */
+void print_pizza_list(struct pizza* list, int size){
+
+
+	for (int i = 0; i < size; i++)
+	{
+
+		struct pizza item = list[i];
+		printf("%s\n",item.name );
+		printf("%f\n",item.prize);
+
+	}
+
+}
+
+/**
+ * Funkcia na porovnanie dvoch ceny dvoch pizz.
+ *
+ * @arg smernik na prvu pizzu
+ * @arg smernik na druhu pizzu
+ * @return nula ak su pizze rovnake. Kladnu hodnotu aj je prva pizza drahsia. Zapornu inak.
+ */
+int compare_pizza (const void * a, const void * b) {
+
+
+	  struct pizza* first = (struct pizza*) a;
+	  struct pizza* second = (struct pizza*) b;
+
+  return (int) (first -> prize - second->prize);
+}
+
+/**
+ * Triedenie pola pizz, podla porovnavacej funkcie compare_pizza
+ *
+ */
+
+void swap(struct pizza* xp, struct pizza* yp) 
+{ 
+    struct pizza temp = *xp; 
+    *xp = *yp; 
+    *yp = temp; 
+} 
+
+void sort_pizza(struct pizza* list,int size) {
+
+
+//qsort (list, size, sizeof(struct pizza), compare_pizza);
+
+
+   int i, j; 
+   for (i = 0; i < size-1; i++)       
+  
+       // Last i elements are already in place    
+       for (j = 0; j < size-i-1; j++){
+
+       		void* a = (void*) &list[j];
+       		void* b = (void*) &list[j+1];
+
+           if (compare_pizza(a,b) > 0)
+ 				swap(&list[j],  &list[j+1]); 
+		}
+
+}
+
+

pizza2.h

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+#ifndef PIZZA2_H
+#define PIZZA2_H
+
+#define LINE_SIZE 100
+#define LIST_SIZE 100
+
+struct pizza {
+	float prize;
+    char name[LINE_SIZE];
+};
+
+int read_line(char* line, int size);
+int read_pizza(struct pizza* item);
+int compare_pizza (const void * a, const void * b);
+void sort_pizza(struct pizza* list,int size);
+int read_pizza_list(struct pizza* list, int size);
+void print_pizza_list(struct pizza* list, int size);
+
+#endif // PIZZA2_H
+