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

Types of structure charts, Types of Structure Charts Transaction struc...

Types of Structure Charts Transaction structure - control module calls subordinate modules, each of which handles a certain transaction More afferent processes Le

How transmission bridges help in satisfying the connectivity, How do tra...

How do transmission bridges help in satisfying the connectivity? A usual transmission bridge is demonstrated in figure. The series capacitance and the shunt inductances of

Enumerate about the trackball device, Enumerate about the trackball A t...

Enumerate about the trackball A trackball is a two-dimensional positioning device, a spaceball provides six degrees of freedom. Unlike the trackball, a spaceball does not actua

Explain about diodes, Q. Explain about Diodes? A single pn-junction wit...

Q. Explain about Diodes? A single pn-junction with appropriate contacts for connecting the junction to external circuits is called a semiconductor pn-junction diode. The fundam

Programming languages array operations, Q. Programming languages array oper...

Q. Programming languages array operations? In programming languages array operations are written in compact form which frequently makes programs more understandable. Conside

Python implementation of a solver for the desert cro, Python implementation...

Python implementation of a solver for the desert crossing, Python Programming #Minimum 100 words accepted#

Computer architecture, Explain division and its restoring and non-restoring...

Explain division and its restoring and non-restoring techniques?

What does not use by FTP, FTP does not use ? FTP doesn't use User Datag...

FTP does not use ? FTP doesn't use User Datagram Protocol.

Determine the concepts of object oriented analysis, Determine the concepts ...

Determine the concepts of Object Oriented Analysis  In OOA the initial focus is on identifying objects from the application domain, after that fitting those procedures around

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