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

What is a sparse matrix, What is a sparse matrix? Sparse Matrix A m...

What is a sparse matrix? Sparse Matrix A matrix in which number of zero entries is much higher than the number of non-zero entries is known as sparse matrix. The natural me

Computational study of a spring-mass system, Idealized spring-mass systems ...

Idealized spring-mass systems have numerous applications throughout engineering. Fig.1 shows an arrangement of three masses and four springs which, after is released, is pulled dow

Explain the high level Language - computer programming, Explain the High Le...

Explain the High Level Language? The programming language such as FORTRAN, C, or Pascal that enables a programmer to write programs those are more or less independent of a parti

Variable-partition multiprogramming, Choose the descriptions below with the...

Choose the descriptions below with the most appropriate memory management scheme (A through D).  Solutions may be used once, more than once, or not at all. A.     Fixed-partitio

Binary constraints, Binary Constraints: Alternatively unary constraint...

Binary Constraints: Alternatively unary constraints specify that a particular variable can take certain values that basically restricts the domain for that variable thus shoul

What are the steps in executing the program, What are the steps in executin...

What are the steps in executing the program? 1.Fetch 2.Decode 3.Execute 4.Store

Differentiate between $display and $strobe, Differentiate between $display ...

Differentiate between $display and $strobe These commands have similar syntax, and display text on screen during simulation. $display and $strobe display once every time they a

What is database integration, What is database integration? Database in...

What is database integration? Database integration is the ability to give user-friendly and cost-effective software solutions for data infrastructure management by the interfac

What is block size of cache memory, Q. What is Block size of cache memory? ...

Q. What is Block size of cache memory? Block Size: Block size means unit of data (few memory words) exchanged between main and cache memory. As block size increases from very

Telecommunications, with poisson arrival of two calls per minute what is th...

with poisson arrival of two calls per minute what is the probability that more than three calls will arrive in two minutes? that is the time during which at least 4 calls will arr

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