Updating a file random access
The structure and logic rules used to manage the groups of information and their names is called a "file system". Each one has different structure and logic, properties of speed, flexibility, security, size and more.
Some file systems have been designed to be used for specific applications.
Using and the record key) the exact location of any record relative to the beginning of the file.
Some popular instant-access applications are airline-reservation systems, banking systems, point-of-sale systems, automated teller machines (ATMs) and other kinds of that require rapid access to specific data.
The bank at which you have your account may have hundreds of thousands, or even millions, of other customers, but when you use an ATM, the bank determines in seconds whether your account has sufficient funds for the transaction.
By separating the data into pieces and giving each piece a name, the information is easily isolated and identified.
Taking its name from the way paper-based information systems are named, each group of data is called a "file".
Basically what I would like to be able to do is be able to write data within a file, without having to 1.