19.1How can I read a single character from the keyboard withoutwaiting forthe RETURN key?
19.2How can I find outhow many characters areavailable for reading,or do a non-blocking read?
19.4How can I clear the screen,orprint things in inverse video,ormove the cursor?
19.5How do I read the arrow keys?What about function keys?
19.7How can I do serial (``comm'') port I/O?
19.8How can I direct output to the printer?
19.9How do I send escape sequencesto control a terminal or other device?
19.11How can I check whether a file exists?
19.12How can I find out the size of a file,prior to reading it in?
19.13How can a file be shortened in-place without completely clearingor rewriting it?
19.14How can I insert or delete a linein the middle of a file?
19.15How can I recover the file name given an openfile descriptor?
19.17What's wrong with thecall"fopen("c:\newdir\file.dat", "r")"?
19.18How can I increase the allowable number of simultaneously open files?
19.20How can I read a directory in a C program?
19.22How can I find out how much memory is available?
19.23How can I allocate arrays or structures bigger than 64K?
19.24What does the error message``DGROUPexceeds 64K''mean?
19.25How can I access memorylocated at a certain address?
19.27How can I invokeanother programfrom within a C program?
19.30How can I invokeanother programandtrapits output?
19.31How can my program discover the complete pathname to the executablefromwhich it was invoked?
19.33How can a process change an environment variable in its caller?
19.36How can I read in an object file and jump to routines in it?
19.37How can I implement a delay,or time a user's response,with sub-second resolution?
19.38How can I trap or ignorekeyboard interruptslikecontrol-C?
19.39How can Ihandlefloating-point exceptions gracefully?
19.40How do I...Use sockets?Do networking?Write client/server applications?
19.40bHow do I use BIOS calls?How can I writeISR's?How can I create TSR's?