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     The C run-time library contains about 400 functions, divided into
     the categories listed below:
 
     Category                   Contents
 
     Buffer manipulation        Manipulate areas of memory on a character
                                basis
 
     Character classification   Test individual characters
 
     Data conversion            Convert numbers to strings and vice versa
 
     Directory control          Manipulate directory structure and
                                information
 
     File handling              Manipulate files
 
     Graphics - Fonts           Font manipulation
 
     Graphics - Low-level       Graphics primitives
 
     Graphics - Presentation    Presentation and charting routines
 
     Graphics - Text            Full screen text output
 
     I/O - Streams              Stream I/O routines
 
     I/O - Low-level            Low-level I/O routines
 
     I/O - Console and Port     Console and port I/O routines
 
     Internationalization       Localization routines
 
     Math                       Math routines
 
     Memory allocation          Allocate, free, and reallocate memory
 
     Miscellaneous              Miscellaneous functions
 
     Process control            Manipulate processes and programs
 
     Searching and sorting      Binary search, linear search, and
                                quicksort routines
 
     String manipulation        String functions
 
     System calls - BIOS        BIOS interrupt services
 
     System calls - DOS         DOS interface routines
 
     Time                       Manipulate system time
 
     Variable-length args       Variable-length argument lists
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