Update 2_stack.cpp

Author: sparklingp8

basic/2_stack.cpp

@@ -1,5 +1,5 @@
 #include <iostream>
-
+//all stack functions implementation in C++
 using namespace std;
 #define MAX 10
 
@@ -127,4 +127,4 @@ int main()
  cout << "Enter correct choice";
  }
  }
-}
+}