Update blackclass.cpp

This will make you the  use of the graphics including size

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;
 }