Delete command, Computer Engineering

Assignment Help:

When the user is inputting commands into your shell, it should properly handle delete and backspace. When one of these characters is detected, you will need to remove one character from the screen. For this, you can simply print a "\b" character to the screen. This will act as the backspace. Remember also to remove the character from the buffer you are using to store the

input. Here are the byte values for the delete and backspace characters:

delete  --> 127

backspace  --> 8

When the user presses delete or backspace, it should remove a character from the screen. But, it should not remove any of the prompts. For example, if the console looks like the following after the user typed the character "a",

/home/ p r o j e c t s / cs200 / spring12 / s h e l l >a

then if the user presses the backspace twice, the console should still look like:

/home/ p r o j e c t s / cs200 / spring12 / s h e l l >

Notice that the prompt is still intact.


Related Discussions:- Delete command

Ann representation - artificial intelligence, A NN Representation ANNs...

A NN Representation ANNs are skilled on AI lessons because of their inspiration from brain studies and the truth that they are applied in an AI jobs, namely machine learning.

What is text editor, What is text editor? It is used for entering and e...

What is text editor? It is used for entering and editing application programs. The user of this program interactively implements command that permit statements of a source prog

Average access time experienced by the processor, Give the formula for the ...

Give the formula for the average access time experienced by the processor in a system with 2 levels of caches. Ans: Formula is for the average access time experienced by the pr

Explain about cd-rom and dvd-rom, Q. Explain about CD-ROM and DVD-ROM? ...

Q. Explain about CD-ROM and DVD-ROM? Optical disks employ Laser Disk Technology that is the latest and most promising technology for high capacity secondary storage. Advent of

What is disk access time, Q. What is disk access time? The disk access ...

Q. What is disk access time? The disk access time has two key components: Seek Time: Seek time is the time for disk arm to move heads to the cylinder comprising the desi

Explain about cathode ray tubes, Q. Explain about Cathode Ray Tubes? Ca...

Q. Explain about Cathode Ray Tubes? Cathode ray tube is the major technology on that televisions and monitors have been based.  CRT is a partially evacuated glass tube which is

Explain working of jaz drive, Q. Explain working of Jaz Drive? Jaz Dri...

Q. Explain working of Jaz Drive? Jaz Drive: Jaz drive is a well-liked drive with 2GB and unleashes creativity of professionals in graphic design and software development, pub

What is compound statement, What is compound statement If we wish to ha...

What is compound statement If we wish to have more than one statement following the if or the else, they should be grouped together between curly brackets. Such a grouping is c

Explain about microprocessors, Q. Explain about Microprocessors? Microp...

Q. Explain about Microprocessors? Microprocessors have instruction sets ranging from 20 to several hundred instructions, known as microprograms, which are stored in ROM to init

Define smtp, SMTP Simple Mail Transfer Protocol, a protocol for sending...

SMTP Simple Mail Transfer Protocol, a protocol for sending e-mail messages among servers. Most e-mail systems that send mail over the Internet use SMTP to send messages from si

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