From fe2d410fa02b7cff0838cb97b372e5c4aa8a8eae Mon Sep 17 00:00:00 2001
From: Denis Landa <denis.landa@student.tuke.sk>
Date: Fri, 3 Oct 2025 07:55:48 +0000
Subject: [PATCH] Add du1/program.c

---
 du1/program.c | 116 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 116 insertions(+)
 create mode 100644 du1/program.c

diff --git a/du1/program.c b/du1/program.c
new file mode 100644
index 0000000..6082c5e
--- /dev/null
+++ b/du1/program.c
@@ -0,0 +1,116 @@
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <ctype.h>
+
+#define LINESIZE 100
+#define MAX_ITEMS 100
+
+struct pizza {
+    float prize;
+    char name[LINESIZE];
+};
+
+char hacker_script(char c) {
+    if (isupper(c)) {
+        return tolower(c);
+    }
+    
+    char numbers[] = "0123456789";
+    char letters[] = "oizeasbtbq";
+    
+    for (int i = 0; i < 10; i++) {
+        if (c == numbers[i]) {
+            return letters[i];
+        }
+    }
+    
+    return c;
+}
+
+int search_string(const char* heap, const char* needle) {
+    int heap_len = strlen(heap);
+    int needle_len = strlen(needle);
+    
+    if (needle_len > heap_len) {
+        return -1;
+    }
+    
+    for (int i = 0; i <= heap_len - needle_len; i++) {
+        int found = 1;
+        
+        for (int j = 0; j < needle_len; j++) {
+            char h_char = hacker_script(heap[i + j]);
+            char n_char = hacker_script(needle[j]);
+            
+            if (h_char != n_char) {
+                found = 0;
+                break;
+            }
+        }
+        
+        if (found) {
+            return i;  
+        }
+    }
+    
+    return -1;  
+}
+
+int read_pizza(struct pizza* item, FILE* stream) {
+    char line[LINESIZE];
+    char price_line[LINESIZE];
+    
+    if (fgets(line, LINESIZE, stream) == NULL) {
+        return 0;
+    }
+    
+    line[strcspn(line, "\n")] = 0;
+    
+    if (fgets(price_line, LINESIZE, stream) == NULL) {
+        return 0;
+    }
+    
+    char* endptr;
+    float value = strtof(price_line, &endptr);
+    
+    if (endptr == price_line || value == 0.0f) {
+        return 0;
+    }
+    
+    strcpy(item->name, line);
+    item->prize = value;
+    
+    return 1;
+}
+
+int main() {
+    char search_term[LINESIZE];
+    struct pizza items[MAX_ITEMS];
+    int item_count = 0;
+    
+    printf("Zadaj hladanu surovinu:\n");
+    if (fgets(search_term, LINESIZE, stdin) == NULL) {
+        printf("Chyba pri čítaní hľadaného reťazca\n");
+        return 1;
+    }
+    
+    search_term[strcspn(search_term, "\n")] = 0;
+    
+    printf("Zadaj jedalny listok:\n");
+    
+    while (item_count < MAX_ITEMS && read_pizza(&items[item_count], stdin)) {
+        item_count++;
+    }
+    
+    for (int i = 0; i < item_count; i++) {
+        if (search_string(items[i].name, search_term) != -1) {
+            printf("%s\n", items[i].name);
+            printf("%.2f\n", items[i].prize);
+        }
+    }
+    
+    printf("Nacitanych %d poloziek.\n", item_count);
+    
+    return 0;
+}
\ No newline at end of file