A few system commands can be used within the interpreter. They are like
functions but when they are called the arguments don't need to be
included in brackets.
- sysem: execute an operating system command
>> system "cmd.exe";
The command prompt window will pop up.
- pwd: show current working directory. Takes no argument
>> pwd;
G:\xlab07\windows\
- cd: change current working directory. Takes one argument, which is the
directory to be changed to (a quoted string).
>> cd "..";
>> cd "secrets";
In Windows, absolute path starts with the drive letter followed by a colon. To
change current drive to D, do
>> cd "D:";
- ls: list files in current working directory. Works the same way
as the shell command ls, but it doesn't take arguments.
- clear: clear the screen.
- cat: print contents of a file.
>> cat "boot.ini";
The contents of file boot.ini will be printed out in the command
window.
- exit: close the interpreter program. Takes no argument.
- help: displays a help message on a given topic. Takes one argument (the
help subject).
>> help "while"
oz
2009-12-22