Update programming-language-resources.md

Nidhirajput1301 · Nidhirajput1301 · commit 7bac392e3093 · 2020-08-23T00:06:17.000+05:30
diff --git a/programming-language-resources.md b/programming-language-resources.md
@@ -14,6 +14,7 @@
     - [STL Cheat Sheet](https://github.com/jwasham/coding-interview-university/blob/master/extras/cheat%20sheets/STL%20Quick%20Reference%201.29.pdf)
     - basics
     - pointers
+    - class and object
     - functions
     - references
     - templates
