1 files changed, 39 insertions, 0 deletions
diff --git a/rushs/evalexpr/heap/add.c b/rushs/evalexpr/heap/add.c
new file mode 100644
index 0000000..78a4db8
--- /dev/null
+++ b/rushs/evalexpr/heap/add.c
@@ -0,0 +1,39 @@
+#include <stdlib.h>
+
+#include "heap.h"
+
+void heapify(int arr[], int n, int i)
+{
+    if (i == 0)
+        return;
+    int parent = (i - 1) / 2;
+    if (parent >= 0)
+    {
+        if (arr[i] > arr[parent])
+        {
+            int tmp = arr[i];
+            arr[i] = arr[parent];
+            arr[parent] = tmp;
+            heapify(arr, n, parent);
+        }
+    }
+}
+
+void add(struct heap *heap, int val)
+{
+    if (heap->size == heap->capacity)
+    {
+        heap->array = realloc(heap->array, heap->capacity * 2 * sizeof(int));
+        if (heap->array == NULL)
+        {
+            free(heap);
+            return;
+        }
+        heap->capacity *= 2;
+    }
+
+    heap->array[heap->size] = val;
+    heap->size++;
+
+    heapify(heap->array, heap->size, heap->size - 1);
+}