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

C++ programming, how does a ohms law c++ programming works

how does a ohms law c++ programming works

Data bus is bidirectional, Why address bus is unidirectional and data bus i...

Why address bus is unidirectional and data bus is bidirectional? Ans) Because there is no require address transaction among processor and peripheral device but data bus is req

Serialized when you perform serialization, What exactly is being serialized...

What exactly is being serialized when you perform serialization? Serialization is the process of changing an object into stream of bytes. We perform it at the time of transpor

Explain cpu based exchange, Explain CPU based exchange. CPU Based Exch...

Explain CPU based exchange. CPU Based Exchange: All the control equipment is replaced with a single processor that must be quite powerful, in centralized control. This should

What are kinds of processors, Processors can broadly be seperated into the ...

Processors can broadly be seperated into the categories of: CISC, RISC, hybrid, and special purpose.

Why did my jdbc code throw a rollback sqlexception, Your JDBC code may thro...

Your JDBC code may throw the following exception: "The coordinator has rolled back the transaction.No further JDBC access is permitted within this transaction." The WebLogic

Average waiting time, Customer arrivals at a gas station can be characteriz...

Customer arrivals at a gas station can be characterized by exponential distribution with mean of 10 minutes. The amount of time they take to pump gas can be characterized by an ex

Which instruction is use in each process before proceeding, Before proceedi...

Before proceeding with its execution, each process must acquire all the resources it needs is called ? Ans. Hold and Wait is requires in each process should acquire all the res

Explain characteristics of program translation model, Explain characteristi...

Explain characteristics of program translation model. The program translation model characteristics are: A program should be translated before this can be executed.

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