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

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

Define e-commerce, Define e-commerce? The term 'electronic commerce' ha...

Define e-commerce? The term 'electronic commerce' has develop from electronic shopping, to imply all aspects of business and market processes enabled by the Internet and World

Design a xnor gate and define its work, N number of XNOR gates is linked in...

N number of XNOR gates is linked in series that is the N inputs (A0, A1, A2......) are specified in the subsequently way: A0 and A1 to first XNOR gate and A2 and O/P of First XNOR

Main features of TCP, The main features of TCP are: Reliability: TCP...

The main features of TCP are: Reliability: TCP makes sure that any data sent by a sender arrives at destination as it was sent. There can't be any data loss or change in the

Anti reflection coating, expression for thickness and refractive index of c...

expression for thickness and refractive index of coating material to act as anti reflection coating

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

Methods for organising the associative memory, There are two methods for or...

There are two methods for organising the associative memory based on bit slices: Bit parallel organisation: In this organisation every bit slices which are not masked off,

Name at least six file extensions of microsoft access, Some of the file ext...

Some of the file extensions present in MS Access are ? Access blank project template .adn ? Access database .accdb ? Access Workgroup .mdw ? Access project .adp ? A

Design and development of an information system, This assignment consists o...

This assignment consists of design and development of an information system. The first part of the assignment consists of the design, which includes construction of ER and DFD diag

What are event and its types, What are event and its types? An event is...

What are event and its types? An event is an occurrence at a point in time, like user depresses left button. Event happens instantaneously with regard to time scale. Type

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