Add a4/program.c

a4/program.c

@@ -0,0 +1,61 @@
+#include <stdio.h>
+
+int main() {
+    int arr[100];  // Array to store the input numbers
+    int n = 0;     // To keep track of how many numbers we have
+
+    // Input the numbers
+    while (scanf("%d", &arr[n]) == 1) {
+        n++;
+    }
+
+    // Check if the array is a min-heap
+    int isHeap = 1;  // Flag to indicate whether it's a min-heap
+
+    for (int i = 0; i < n; i++) {
+        int left = 2 * i + 1;
+        int right = 2 * i + 2;
+
+        // Check if left child exists and if it is smaller than the parent
+        if (left < n && arr[i] > arr[left]) {
+            isHeap = 0;  // Not a min-heap
+            break;
+        }
+
+        // Check if right child exists and if it is smaller than the parent
+        if (right < n && arr[i] > arr[right]) {
+            isHeap = 0;  // Not a min-heap
+            break;
+        }
+    }
+
+    if (isHeap == 0) {
+        printf("Nie je kopa.\n");  // If it's not a min-heap, print this
+        return 0;  // End the program
+    }
+
+    // If it's a min-heap, print the binary tree in preorder
+    printf("Je to taka kopa:\n");
+
+    // Function to print tree in preorder
+    void printPreorder(int i, int level) {
+        if (i >= n) {
+            return;  // Stop if index is out of bounds
+        }
+
+        // Print the current node with spaces for the level
+        for (int j = 0; j < level; j++) {
+            printf(" ");
+        }
+        printf("%d\n", arr[i]);
+
+        // Recursively print left and right children
+        printPreorder(2 * i + 1, level + 1);  // Left child
+        printPreorder(2 * i + 2, level + 1);  // Right child
+    }
+
+    // Start with the root node
+    printPreorder(0, 0);
+
+    return 0;
+}