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

Computer Architecture, As an advocate of CISC architecture to RISC architec...

As an advocate of CISC architecture to RISC architecture, what are the merits and demerits of CISC to RISC architecture

What are digital signatures and its uses, What are Digital Signatures and i...

What are Digital Signatures and its uses? A digital signature is an electronic quite than a written signature which can be used through someone to authenticate the identity of

How are the instructions executed and interpreted, Q. How are the instructi...

Q. How are the instructions executed and interpreted? All computers have a Unit which performs arithmetic and logical functions. This Unit is called as Arithmetic and Logic Uni

Explain time complexity in parallel algorithms, Q. Explain Time Complexity ...

Q. Explain Time Complexity in Parallel algorithms? As it takes place nearly everyone who implement algorithms wish to know how much of an individual resource (for example time

How are standard query operators implemented in linq, Standard Query Operat...

Standard Query Operators are executed as extension methods in .NET Framework. These Standard Query Operators can be used to work with any collection of objects that executes the IE

Shift microoperations, Shift Microoperations Shift microoperation can b...

Shift Microoperations Shift microoperation can be used for serial transfer of the data. They are used generally with arithmetic, logic and other data-processing operations. The

Determine why a new system is required, Q. Determine why a new system is re...

Q. Determine why a new system is required? Feasibility Study: - Feasibility study is the method of defining the current problem determining why a new system is essential and

How does the race condition occur, It happens when two or more processes ar...

It happens when two or more processes are reading or writing some joint data and the final result depends on who runs exactly when.

What is external procedures, Q. What is External Procedures? These proc...

Q. What is External Procedures? These procedures are written as well as assembled in separate assembly modules and afterwards linked together with the main program to form a bi

Determine the fastest logic, Which of the fastest logic: TTL, ECL, CMOS and...

Which of the fastest logic: TTL, ECL, CMOS and LSI ? Ans. The fastest logic family of all logic families ECL. High  speeds  are  possible  in  ECL  since the  transistors  a

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