Working with relative files

Write examples for working with relative files. Choose a type of entities adequate for use with a relative file: must have a relative key (numbers, in sequence). Establish the informational model of the entities (fields to be represented). Create and populate a binary relative file with information regarding the chosen entities. Initial data must be read from keyboard. At least 20 valid records must be added. Perform an integral consultation of the file created above. Define and implement consultations: 1. for one entity identified by the corresponding key value. 2. for one entity, identified by a unique field value (must be something other than the key). 3. for a group of entities, selected by a common value of a field (must be something other than the key) Define and implement changes: 1. for one entity identified by the corresponding key value. 2. for one entity, identified by a unique field value (must be something other than the key). 3. for a group of entities, selected by a common value of a field (must be something other than the key) Create an archive (.rar or .zip) with the following items: the binary data file created, the source code for all examples, the text file with the integral consultation results. Do not add any other files!