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I am trying to answer a question for a homework assignment. I have to split an input of numbers into a phone number. The input is 8005551212 and the output needs to look like 800-555-1212.

My question is that I do not know how to specifically split a section of the numbers. I figured out how to use % to select the rightmost digits. Now, I just need to isolate 800 and 555.

Thank you so much!

In the purpose of my homework, I learned pointer to function and lambda function.
I create a class Rectangle that contain width and length and calculate area. One of the question is to create a class MyVector that is a derived class of stl vector and contain function called func that take in parameter a Boolean function and return true if at least one of the element in the vector is answer to the function otherwise, false will be returned.(I called this boolean function cmp)
In the main, I have to check if at least one rectangle have an area more that 50, if it is the case display all rectangle. I don't know how to use this pointer function very well, so can you help me understand this through my example

Rectangle class:

I am running into trouble with SQL code for SQLite. It is a small homework problem I have gotten mostly figured out, but can't find the correct answer for converting an INT to something I can use ROUND with.

I would like to zip the items of 2 sequences based on a common property similar to joining them when using enumerables. How can I make the second test pass?

I have this function that returns all the files in the folder after deleting the stop words from them, but the problem is that when I print the result of this function, only the content of the first file is printed, and I want to print all the files after deleting the stop words from them.

How can I solve the problem?

I have a folder that contains a group of files, and each file contains a text string, periods, and commas. I want to replace the periods and commas with spaces and print all the files afterwards.

I used Replace, but this error appeared to me:

I have this project.

I have a folder called "Corpus" and it contains a set of files. It is required that I delete the "stop words" from these files and then save the new files that do not contain the stop words in a new folder called "Save-files".

And when I opened the “Save-Files” folder, I saw inside it the files that I had saved, but they were without content, that is, when I open the number one file, it is empty without content.

And as it is clear in the first picture, here is the “Save-Files” folder, and inside it there is a group of files that i saved.

And when I open any of the files, it is empty.

How can I solve the problem?

Define a class for a type called CounterType. An object of this type is used to count things, so it records a count that is a nonnegative whole number.

a. Private data member: count.

b. Include a mutator function that sets the counter to a count given as an argument.

c. Include member functions to increase the count by one and to decrease the count by one.

d. Include a member function that returns the current count value and one that outputs the count.

e. Include default constructor that set the count to 0.

f. Include one argument constructor that set count to given argument.

Be sure that no member function allows the value of the counter to become negative.

Embed your class definition in a test program.

An output example would be:

Using Android Studio 4.2.1 and trying to handle a RecyclerView I get an error when trying to build my own ViewAdapter.

I've added implementation 'androidx.recyclerview:recyclerview:1.2.1' to my build.gradle :app file.

My activity_main file is like this: