where to store data

[BRMV]

In the development of a win 32 console application in c++, i am required to use data which is updated frequently.

ex: In the booking of a train tickets after each transaction the availability of seats are decremented .For Each execution of program i should get the current availability.

my question is where should i store this data like availability of tickets inorder to acess it for the next execution of the program.
I used a text file but getting availability of different trains from the same text file found tedious.

thank you

[Athar]

I used a text file but getting availability of different trains from the same text file found tedious.

It shouldn't be.
However in theory, you could use one file per train.