DOS Batch Language Assignment Help

In DOS, OS/2, and Microsoft Windows, a batch file is a text file containing a series of commands intended to be executed by the command interpreter. X Similar to job control language and other systems on mainframe and minicomputer systems, batch files were added to ease the work required for certain regular tasks by allowing the user to set up a script to automate them. When a batch file is run, the shell program (usually COMMAND.COM or cmd.exe) reads the file and executes its commands, normally line-by-line. Unix-like operating systems (such as Linux) have a similar type of file called a shell script.

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Features of DOS Batch language programming:

• Major time saving.
• Fewer keystrokes required to perform computer operations.
• Short commands are easier to remember than a long series of keystrokes.
• Decisions can be made automatically.
• One command executes an extended chain of complicated operations.

Advanced batch example - conditional shutdown

{`
  
  @echo off
  color 3
  title Conditional Shutdown
  set /p name="enter a name:"
  :start
  cls
  echo Hi, %name%
  echo.
  echo 1.Shutdown
  echo 2.Quit
  :invalid_choice
  set /p choice="enter your choice 1,2: "
  if %choice%==1 goto shutdown
  if %choice%==2 exit
  echo invalid choice: %choice%
  goto invalid_choice
  :shutdown
  cls
  set /p sec="enter the number of seconds that you wish the computer to shutdown in: "
  set /p message="enter the shutdown message you wish to display: "
  shutdown -s -f -t %sec% -c "%message%"
  echo shutdown initiated at %time%
  set /p cancel="type cancel to stop shutdown "
  if %cancel%==cancel shutdown -a

  if %cancel%==cancel goto start
  `}