Quick Search in file handling

[ravjot28]

I made a project on telephone directory.
I have used single class and my reading and writing in the file is done by
fin.[write/read]((char*)&object,sizeof(object));
Now the problem is during searching a particular name or phone no. is just read the file and match the name or the phone no. in each record.

Now is there any method or way i which my searching speed is increased and it can handle large datas.

Plzz help me

[Mitsakos]

You can use some indexing to make it go faster.
For example to know that names from A-K starts at the beginning of the file and names L-Z starts from a certain point. So if your name starts from L-Z to move your reading pointer straight to the beginning of the L.
You can add additional indexes also.