In COBOL, file processing and I/O operations are essential for handling data stored in external files. COBOL provides robust features and constructs to efficiently read from and write to files, manage record handling, and handle errors that may occur during file operations. Let's delve into the key concepts related to file processing and I/O operations in COBOL:
1. File Organization:
* COBOL supports various file organizations, including sequential, indexed, and relative.
* Sequential files store records in a sequential manner, where records are accessed in the order they were written.
* Indexed files organize records based on a key, allowing for random access and efficient record retrieval.
* Relative files store records based on a relative record number, providing direct access to specific records.
2. File Control:
* The FILE-CONTROL paragraph in COBOL programs is used to define and manage files.
* It includes statements to specify the file name, organization, access mode, and oth....
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