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

Explain the term - ancestors, Explain the term - ancestors The ancestor...

Explain the term - ancestors The ancestors of modern age computer were mechanical and electro-mechanical instruments. This ancestry can be traced as back and seventeenth centur

What are the components of i-way infrastructure, What are the components of...

What are the components of I-way Infrastructure? There are three components of the I-way infrastructure: • Consumer access equipment • Local on-Ramps • Global informat

Convert the following from octal to binary, Q. Convert the following from o...

Q. Convert the following from octal to binary, decimal, hexadecimal and BCD. a) 7.7 b) 4037 c) 23.34

What is single program multiple data, Q. What is Single Program Multiple Da...

Q. What is Single Program Multiple Data (SPMD) SPMD is in fact a "high level" programming model which can be built on any arrangement of previously described parallel programmi

Software engineering - layered technology, S oftware Engineering - Layered...

S oftware Engineering - Layered Technology Although various authors have developed personal definitions of software engineering, a definition given by Fritz Bauer at the semin

Illustrate master-slave flip-flop, Q. Illustrate Master-Slave Flip-Flop? ...

Q. Illustrate Master-Slave Flip-Flop? Master slave flip-flop comprise two flip-flops. One is master flip-flop and other one is known as slave flip-flop. Fig below shows impleme

Find simplified function f and implement, Q. Find simplified function F and...

Q. Find simplified function F and implement that function using only NAND gates. 1. F(A,B,C) = (A+B) (A'+B+C') (A'+B'+C') 2. F (A,B,C) = A'B'C'+B'CD'+A'BCD'+AB'C' 3. F(X,Y

Design issues of interconnection network, Design Issues Of Interconnection ...

Design Issues Of Interconnection Network The following are the problems, which should be considered while preparing an interconnection network. 1)   Dimension and size of n

Case x and z difference which is preferable and why, Case x, z difference, ...

Case x, z difference, which is preferable, why? CASEZ : Special version of case statement that uses a Z logic value to signify don't-care bits. CASEX : Special

Rectifier output with fitters, Rectifier output with fitters: When hal...

Rectifier output with fitters: When half-wave and full-wave rectification suffice to deliver a type of DC output, neither produces constant-voltage DC (direct current). To gen

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