diff --git a/basic_content/sizeof/blackclass.cpp b/basic_content/sizeof/blackclass.cpp
index 6c25a43..5b8af95 100644
--- a/basic_content/sizeof/blackclass.cpp
+++ b/basic_content/sizeof/blackclass.cpp
@@ -7,12 +7,13 @@
  */
 
 #include<iostream>
-
+#include<bits/stdc++.h>
 using namespace std;
-
+#include<graphics.h> // use size in graphics also
 class A{};
 int main()
 {
     cout<<sizeof(A)<<endl;
+    cout<<sizeof
     return 0;
 }