du2

du2/program.c

@@ -0,0 +1,75 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#define LINE_SIZE 100
+#define MAXIT 100
+
+
+struct pizza{
+   char name[LINE_SIZE];
+   float prize;
+};
+
+
+int read_pizza(struct pizza *item){
+        char line_1[LINE_SIZE];
+        char line_2[LINE_SIZE];
+
+        if (fgets(line_1,LINE_SIZE,stdin)==NULL) return 0;
+        if (fgets(line_2,LINE_SIZE,stdin)==NULL) return 0;
+
+        line_1[strcspn(line_1,"\n")] = '\0';
+        line_2[strcspn(line_2,"\n")] = '\0';
+
+        float price = 0.0;
+        if (sscanf(line_2, "%f", &price)!=1||price<=0) return 0;
+
+        strcpy(item->name, line_1);
+        item->prize = price;
+
+        return 1;
+}
+
+
+int read_pizza_list(struct pizza* list){
+	int counter = 0;
+	for(int i = 0; i<MAXIT;i++){
+		struct pizza item;
+		memset(&item,0,sizeof(struct pizza));
+		int r = read_pizza(&item);
+		if (r){
+	    		memcpy(&list[counter], &item, sizeof(struct pizza));
+            		counter++;
+        	} else {
+            		break;
+        	}
+    	}
+    	return counter;
+}
+
+
+int compare_pizza (const void * a, const void * b){
+	const struct pizza *p1 = (const struct pizza *)a;
+	const struct pizza *p2 = (const struct pizza *)b;
+	
+	if(p1->prize<p2->prize) return -1;
+	if(p1->prize>p2->prize) return 1;
+
+	return strcmp(p1->name,p2->name);
+
+}
+
+
+int main(){
+	struct pizza list[MAXIT];
+	memset(list,0,sizeof(list));
+
+	int count = read_pizza_list(list);
+	
+	qsort(list,count,sizeof(struct pizza), compare_pizza);
+	for (int i = 0;i<count;i++){
+		printf("%s\n%.6f\n",list[i].name,list[i].prize);
+	}
+	return 0;
+}

du2/vstup.txt

@@ -0,0 +1,12 @@
+Salamovo Fazulova pizza
+7.96
+Sunkova pizza
+5.77
+Bryndzova pizza
+8.67
+Zelerova pizza
+8.86
+Slaninovo Sunkova pizza
+7.55
+Slaninova pizza
+5.16