c++ reference documentation added (#286)

docs/day-14/Create-References.md

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+---
+sidebar_position: 1
+title: "C++ References"
+description: "In this tutorial, we will learn about the hoe to create References in C++."
+sidebar_label: "Create References"
+slug: C++ References
+---
+
+## Creating References
+
+A reference variable is a "reference" to an existing variable, and it is created with the & operator:
+
+
+  ```cpp
+ string food = "Pizza"; // food variable
+string &meal = food; // reference to food
+
+ ```
+
+ Now, we can use either the variable name food or the reference name meal to refer to the food variable:
+ ## Example 
+
+  ```cpp
+  string food = "Pizza";
+string &meal = food;
+
+cout << food << "\n"; // Outputs Pizza
+cout << meal << "\n"; // Outputs Pizza
+
+ ```
+
+

docs/day-14/Memory-Address.md

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+---
+sidebar_position: 2
+title: "C++ Memory Address"
+description: "In this tutorial, we will learn about the concept of C++ memory Address ."
+sidebar_label: "C++ Memory Address"
+slug: memory address in c++
+---
+
+## Memory Address
+
+In the example from the previous page, the & operator was used to create a reference variable. But it can also be used to get the memory address of a variable; which is the location of where the variable is stored on the computer.
+
+When a variable is created in C++, a memory address is assigned to the variable. And when we assign a value to the variable, it is stored in this memory address.
+
+To access it, use the & operator, and the result will represent where the variable is stored:
+
+- ### **Example**
+
+ ```cpp
+ string food = "Pizza";
+
+ cout << &food; // Outputs 0x6dfed4
+ ```
+
+Note: The memory address is in hexadecimal form (0x..). Note that you may not get the same result in your program.