(TurboC2.0 stable English version.zip is the basic software for learning C language. Of course, it also has powerful functions, which will have to be discovered by users themselves..
INCLUDE\SYS\STAT.H
INCLUDE\SYS\TIMEB.H
INCLUDE\SYS\TYPES.H
INCLUDE\ALLOC.H
INCLUDE\ASSERT.H
INCLUDE\BIOS.H
INCLUDE\CONIO.H
INCLUDE\CTYPE.H
INCLUDE\DIR.H
INCLUDE\DOS.H
INCLUDE\ERRNO.H
INCLUDE\FCNTL.H
INCLUDE\FLOAT.H
INCLUDE\GRAPHICS.H
INCLUDE\IO.H
INCLUDE\LIMITS.H
INCLUDE\MALLOC.H
INCLUDE\MATH.H
INCLUDE\MEM.H
INCLUDE\PROCESS.H
INCLUDE\SETJMP.H
INCLUDE\SHARE.H
INCLUDE\SIGNAL.H
INCLUDE\STDARG.H
INCLUDE\STDDEF.H
INCLUDE\STDIO.H
INCLUDE\STDLIB.H
INCLUDE\STRING.H
INCLUDE\TIME.H
INCLUDE\VALUES.H)