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 sdram, Synchronous dynamic random access memory (SDRAM) is dynamic ...

Synchronous dynamic random access memory (SDRAM) is dynamic random access memory (DRAM) that is initialized with the system bus. Classic DRAM has an asynchronous interface, which m

Advantage of a numeric mailbox identifier, Does a numeric mailbox identifie...

Does a numeric mailbox identifier have any advantage over a mnemonic identifier? Explain. Several software systems permit the system administrator to select mailbox names, wher

How many types of stages include in process of data mining, How many types ...

How many types of stages include in process of data mining? The process of data mining comprised three stages as given below: a) The initial exploration b) Model buildin

Emerging cloud computing technology, A chart illustrating the differences a...

A chart illustrating the differences among the new cloud-based technologies (Workday) and the traditional . a. The new cloud-based solutions benefit Workday from every facet wh

Cse 320, Explain the functionality of the quadrant approach in the Spiral M...

Explain the functionality of the quadrant approach in the Spiral Model ?

Explain use of mpi functions with an example, Q. Explain use of MPI functio...

Q. Explain use of MPI functions with an example? include int main(int argc, char **argv) { int i, tmp, sum, s, r, N, x[100]; MPI_Init(&argc, &argv); MPI_Comm_size

What is meant by "method-wars" in programming, Before 1994 there were dissi...

Before 1994 there were dissimilar methodologies like Rumbaugh, Booch, Jacobson, and Meyer etc who followed their own notations to mould the systems. The developers were in a di

Pervasive computing, Explain why pervasive computing can be termed as a “te...

Explain why pervasive computing can be termed as a “technology that disappears”

Explain minimum hardware to indicate direction of rotating, The circle can ...

The circle can rotate clockwise and back. By using minimum hardware build a circuit to indicate the direction of rotating? Two sensors are required to determine the direction o

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