Q42802: DOS Redirection and QuickC Environment Command Line

Article: Q42802
Product(s): See article
Version(s): 1.00 1.01 2.00
Operating System(s): MS-DOS
Keyword(s): ENDUSER | | mspl13_c
Last Modified: 2-MAY-1989

In Microsoft QuickC Versions 1.00 and 1.01, the command line can be
entered from the RUN menu, "Set Runtime Options" screen. Version 2.00
has the command-line screen on the OPTIONS menu, "Run / Debug" screen.

The Microsoft Quick C Versions 1.00, 1.01, and 2.00 integrated
environments do not allow DOS's "<input.fil >output.fil" redirection
commands when they are entered in the "enter command line" portion of
QuickC. They become normal arguments to the application program.

In QuickC 2.00, you can achieve redirection of input and output by
entering their commands in the "Run DOS command..." screen in the
UTILITY menu. The disadvantage is the loss of the debugger.

For redirection to be initiated, a new command process must be
invoked. Since QuickC spawns the application program directly, no new
COMMAND.COM is loaded. Thus, the redirection commands become arguments
to the application.

Input and output can be redirected at the execution of QuickC.

For input redirection, the following command will use the contents of
PROG.IN as the input data for the application:

   qc prog.c <prog.in

The input will be consumed as the program requests input. When the
input is depleted, subsequent requests for input will not be
satisfied. Thus, the program waits forever. CTRL+BREAK or CTRL+C will
take you back to the environment in Versions 1.00 and 1.01. Version
2.00 does not return control back to the environment.

For Version 2.00, if output is redirected on the invocation of Quick
C, as in the following example, all of the output from the application
program, including PROG.EXE, is sent to the file PROG.OUT at the
beginning; and "Elapsed time 00:00:08.97. Program returned (-1). Press
any key." is sent at the end:

   qc prog.c >prog.out

Quick C Versions 1.00 and 1.01 will send the string "Program returned
(-1). Press any key." to the output file after your application has
completed.

Note: DOS redirection will affect the DOS shell. If input was
redirected, you will not be able to type "exit" in order to get back to
QuickC.

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