create c folder and finished array

codes/c/include/PrintUtil.h

@@ -0,0 +1,30 @@
+/*
+ * File: PrintUtil.h
+ * Created Time: 2022-12-21
+ * Author: MolDum (moldum@163.com)
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+// #include "ListNode.h"
+// #include "TreeNode.h"
+
+/**
+ * @brief Print an Array
+ * 
+ * @param arr 
+ * @param n 
+ */
+
+static void printArray(int* arr, int n)
+{
+    printf("[");
+    for (int i = 0; i < n - 1; i++) {
+        printf("%d, ", arr[i]);
+    }
+    printf("%d]\n", arr[n-1]);
+}
+
+