C++ has a wide variety of Container Classes. Each Container Class has its suitability for diffirent operations.
For Example :
a vector found in #include <vector> Is a container. Apart from that there are many of these containers such as Stack or Queue etc.
>>"Please let me know how can i use the container classes and STL in c++."
So if you would like to learn how to use container classes. I think that you should get yourself a good book on C++, and until now I have not come across a c++ book which doesnt explain the basics of standard containers.
So I guess you could start up reading a good book On C++.
There is a huge list of good c++ books which can be found CLICKY-HERE
>>shall i need any S/w or C++ IDE is enough?
Well IDE gives you a certain environment to write code, However I think that you will atleast need a good c++ compiler installed onto your system .
If you are looking for a compiler here is a link to it. Another Clicky (List of Compilers)
#define A 3// name a constant
long int booking_ID ; ...