Buffered file input is basically the operation where data previously cached in the buffer is read from the buffer and written into a file. This type of operating procedure is often used to reduce database or file input/output so that overall performance is enhanced. This type of procedure is used most commonly in C and UNIX where these languages supply standard packages for performing buffered file input and output.

Since there are no input/output statements in C there is a specific operating approach to input/output that makes C's file system very flexible and powerful. This approach uses the buffer, an area of memory used for storing information, and all input/output file operations occur via calls to functions in the standard operating library. The buffer, typically an area for storing information, is often used to decouple processes so that readers and...