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

List the key notions concerning macro expansion, List the key notions conce...

List the key notions concerning macro expansion. Two key notions relating to macro expansion is: 1. Expansion time control flow- Determines the order of model statements tha

Illustrate associative memory, Q. Illustrate Associative Memory? The ti...

Q. Illustrate Associative Memory? The time required to find an item which is stored in memory can be decreased significantly if stored data can be identified for access by cont

Micro programmed control and hardwired control, Explain micro programmed co...

Explain micro programmed control. Ans: A micro programmed control unit is made around storage till is called a control store where all the control signals are stored in a prog

What are the variations in a fast adder, a. Design a fast adder. What are t...

a. Design a fast adder. What are the variations in a fast adder? b. Define how the virtual address is changed into real address in a paged virtual memory system. Give an example

How the information can be stored, In a RAM, information can be stored ? A...

In a RAM, information can be stored ? Ans. RAM is used by the user, number of times.

Explain salient points about indirect addressing, Q. Explain salient points...

Q. Explain salient points about indirect addressing? A number of salient points about this scheme are:  In this addressing scheme effective address EA and contents of th

Computer architecture by henessy and patterson, what is initial interval an...

what is initial interval and latency in a functional unit(fp) of a pipeline

Number system, Number systems   Consider a decimal number:         ...

Number systems   Consider a decimal number:               7654.32   Short hand for:            7 * 103 + 6*102 + 5* 101 + 4*100 + 3*10 -1  + 2*10 -2   Likewise

What are stacks, What are stacks? A stack  is an abstract data type in...

What are stacks? A stack  is an abstract data type in which items are additional to and removed only from one end known as TOP. For example, consider the pile of papers on you

Define memory utilization factor, Memory utilization factor shall be comput...

Memory utilization factor shall be computed as? Ans. memory in use/total memory connected.

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