Break keys, Computer Engineering

Assignment Help:

Like a normal read, your input should break on the new line character "\n"  and also on the up and down arrow keys. You will process the input made by the user when he/she enters new line.

History

Your shell must keep a history of the last 10 commands executed. When the user presses the up key the current input should show the last command executed (as the user typed it). So if the user executed the "ls" command, then pressed the up key, then pressed enter, the ls command should be executed. When the user presses up multiple times, you should replace the input with the next previous command. Until you reach the end of the history list (max of 10). If the user presses up and reaches the end of the list, the next time up is pressed nothing should happen. Conversely when the down arrow is pressed you should cycle through the history in the other direction. So if

the user presses down without pressing up, nothing should happen. That is because you will be at the bottom of the list. After a command is executed it should be added to the list and the index of where the user is in the history should be reset. This functionality should be similar to how the Bash shell works.


Related Discussions:- Break keys

What is an orthogonal base class in c++, If two base classes have no overla...

If two base classes have no overlapping methods or data they are said to be independent of, or orthogonal to each other. Orthogonal in the sense means that two classes function in

Computer networking, what are the steps to implement bus topology?

what are the steps to implement bus topology?

Signed 1’s complement representation, Q. Signed 1s complement representatio...

Q. Signed 1s complement representation? Another possibility that is also simple is use of signed 1's complement. Signed 1's complement has a principal. Add both numbers includi

Fundamental types of flash memory, Q. Fundamental types of flash memory? ...

Q. Fundamental types of flash memory? Code Storage Flash which is made by Intel, AMD, Atmel. It stores programming algorithms and it is largely found in cell phones. Data

Define time sharing, Define Time Sharing. Time Sharing: Sharing of ...

Define Time Sharing. Time Sharing: Sharing of a computing resource among various users by means of multiprogramming and multi-tasking is termed as timesharing. By permittin

What is interrupt and function of color graphics adopter, Q. What is inter...

Q. What is interrupt? How it is useful in controlling I/O operations. Q. Explain function of Color Graphics Adopter card and Diskette Drive Adopter Card.

Explain working of bit serial associative processor, Q. Explain working of ...

Q. Explain working of Bit Serial Associative Processor? When associative processor accepts bit serial memory organization subsequently it is known as bit serial associative pr

String, super string checker

super string checker

Arithmetic pipeline, Arithmetic Pipeline The complex arithmetic operati...

Arithmetic Pipeline The complex arithmetic operations like floating point and multiplication operations use a lot of the time of the ALU. These operations can also be pipelined

Determine about the verilog task, Determine about the Verilog Task - Ta...

Determine about the Verilog Task - Tasks are capable of enabling a function as well as enabling other versions of a Task. - Tasks also run with a zero simulation however the

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd