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

Find the minimum sop and pos expression, Q.  Find the minimum SOP and POS e...

Q.  Find the minimum SOP and POS expression for the following functions using K- Map and realize the expression using appropriate gates. Also realize SOP form using NAND-to-NAND ga

Explain the difference between fixed and standard effect, Question: (a)...

Question: (a) There are several camera angles that can be used to make a sequence more interesting for a video production project. Explain clearly, using diagrams where appro

Explain the outsourcing barriers that an organization faces, Explain the ou...

Explain the outsourcing barriers that an organization faces. 1. Critical operations that cannot be outsourced. 2. Negative customer reaction. 3. Employee resistance. 4

What is called that switch if switch capacity is full, When a switch capaci...

When a switch capacity is full, calls coming into that switch are said to be                 . (A)  open                                            (B)  shorted (C) bloc

Compute total and access methods, Write a program that input (from the user...

Write a program that input (from the user) the number of hours worked and hours pay rate for employees and output their total pay. The program should process an arbitrary number of

Explain vector processing issues in pipelining, Vector Processing   A...

Vector Processing   A vector is an ordered set of similar type of scalar data items. The scalar tem may be a logical value, an integer or a floating point number. Vector proce

Computers and cntrol, Define open and closed loop cotrol systems.Explain di...

Define open and closed loop cotrol systems.Explain difference between time varying and time invariant control system wth suitable example

Differences between datagrid and datalist, Differences between Datagrid, Da...

Differences between Datagrid, Datalist and Repeater?   1. Datagrid has paging while Datalist doesnt. 2. Datalist has a property known as repeat. Direction = vertical/horizon

Does xml replace html, No XML does not replace HTML. Instead, it gives an a...

No XML does not replace HTML. Instead, it gives an alternative which permits you to explain your own set of markup elements. HTML is expected to stay in common use for some time to

What is a spanning tree, What is a spanning Tree? A spanning tree is a ...

What is a spanning Tree? A spanning tree is a tree associated with a network. All the nodes of the graph appear on the tree once. A minimum spanning tree is a spanning tree

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