In Project 23 we created a B-tree index by reading the file. Rather than read the file each time the program starts, we could store the index as a separate file on the disk. In this case, when the...

In Project 23 we created a B-tree index by reading the file. Rather than read the file each time the program starts, we could store the index as a separate file on the disk. In this case, when the program starts, the index is read and inserted into the B-tree. When the program is done, the updated B-tree index is written back to the disk. Modify the program from Project 23 to store the index on the disk.