求大神帮助

Output
Each command will have a related set of output. After you read each command, echo the command and the results of the command.
load: The load command is given an mbox file to load, so the results would be the command and the file name, on the next line you'll indicate how many messages are loaded.
add: The add message is followed by a message to add. The output will indicate if the message was okay and added to the inbox, or not okay and added to the hacked list.
show: If just the list name is given then all the messages are shown for that list. If a number is also given then just the one message is shown. If the message number is invalid then an error message is given.
remove: If the message number is valid and the message is removed, then positive message is output. If the message number is invalid then a message is output about not removing the message.
save: After the mail box is saved a message is output indicating how many messages were saved.
A note about adding a removing. When you add a message, the new message simply goes at the end of the array. When you remove, I want you to slide down over the empty space. Do not swap the last one in it's place. The basics of sliding down are once you know where the message is being remove all messages above it, or at a higher index location, are moved down 1 index location to cover up the empty spot.
See the attached file below for more examples.
Samples
This is a sample command file
load mbox add From dmcphers@vt.edu Date 2017/03/21 To dmcphers@vt.edu Subject Get Started on P4 Message Hey don't put off project 4 any more. You'll thank me when you are done. ID 3630 show inbox remove inbox -3 save inbox mbox2 remove inbox 1 add From dmcphers@vt.edu Date 2017/03/21 To dmcphers@vt.edu Subject Get Started on P4 Message Hey don't put off project 4 any more. You'll thank me when you are done. ID 3631 show hacked remove hacked 0 #any line with # is a comment #add remove good number #add show inbox good number #add hacked message #add show hacked list #add show hacked with a number
This would be the results from running the command file
Command: load mbox Messages: 1 Command: add Message added Command: show inbox From HIWTDIPPG@vt.edu Date 2014/4/11 To RLCVAZDSA@vt.edu Subject Let's do lunch Message At first she would call to him as she did so with words that she probably considered friendly, such as "come on then, you old dung-beetle!", or "look at the old dung-beetle there!" Gregor never responded to being spoken to in that way, but just remained where he was forced to impose on them. "Anna! Anna!" his father called into the kitchen through the entrance hall, clapping his hands, "get a locksmith here, now!" And the two girls, their skirts swishing, immediately ran out through the hall, wrenching open the front door of the bedroom opened and Mr. "Grete, come with us in here for a little while then as well, and Gregor's sister would leave her work to help her mother, but nothing would have any effect on him. Now Gregor's sister also had to help his mother with the music stand, his mother with the music stand, his mother with the music stand, his mother with the cooking; although that was not about him in some other food that was more suitable? If she didn't do it herself he would rather go hungry than draw her attention to it, although he did not want to think about too much, so he started to move toward her, he was slow and infirm, but it was only now out of politeness that they allowed their peace to be disturbed. Smears of dirt were left on the walls, here and there were now many such things as one of the worst of these places when his sister no longer had any particular reason to be upset, and if he finally managed to do what he wanted with that leg, all the others seemed to be set free and would move about painfully. Please don't make things any harder for me than they are already, and don't take sides against me at the office. And the injury in Gregor's back began to hurt as much as he would. ID 4135 From dmcphers@vt.edu Date 2017/03/21 To dmcphers@vt.edu Subject Get Started on P4 Message Hey don't put off project 4 any more. You'll thank me when you are done. ID 3630 Command: remove inbox -3 Message not removed Message -3 not a valid message number Command: save inbox mbox2 2 Messages saved Command: remove inbox 1 Message removed Command: add Message was not authentic. Sent to hacked list. Command: show hacked From dmcphers@vt.edu Date 2017/03/21 To dmcphers@vt.edu Subject Get Started on P4 Message Hey don't put off project 4 any more. You'll thank me when you are done. ID 3631 Command: remove hacked 0 Message removed
For the shown commands this is the mbox that was loaded. It only has a single message:
From HIWTDIPPG@vt.edu Date 2014/4/11 To RLCVAZDSA@vt.edu Subject Let's do lunch Message At first she would call to him as she did so with words that she probably considered friendly, such as "come on then, you old dung-beetle!", or "look at the old dung-beetle there!" Gregor never responded to being spoken to in that way, but just remained where he was forced to impose on them. "Anna! Anna!" his father called into the kitchen through the entrance hall, clapping his hands, "get a locksmith here, now!" And the two girls, their skirts swishing, immediately ran out through the hall, wrenching open the front door of the bedroom opened and Mr. "Grete, come with us in here for a little while then as well, and Gregor's sister would leave her work to help her mother, but nothing would have any effect on him. Now Gregor's sister also had to help his mother with the music stand, his mother with the music stand, his mother with the music stand, his mother with the cooking; although that was not about him in some other food that was more suitable? If she didn't do it herself he would rather go hungry than draw her attention to it, although he did not want to think about too much, so he started to move toward her, he was slow and infirm, but it was only now out of politeness that they allowed their peace to be disturbed. Smears of dirt were left on the walls, here and there were now many such things as one of the worst of these places when his sister no longer had any particular reason to be upset, and if he finally managed to do what he wanted with that leg, all the others seemed to be set free and would move about painfully. Please don't make things any harder for me than they are already, and don't take sides against me at the office. And the injury in Gregor's back began to hurt as much as he would. id 4145Signing the Messages
To sign the messages we are going to use SHA256. Linked below is a file that will do that for you. The "message" we are hashing is the combination of the from, date, to, subject and message in that order. You can combine them into a single string using +. For example:
string messageToHash = from + date + to + subject + message;
That assumes you have variables with the names from, date, to, subject, and message. Your variable names may differ. First we have to hash the message. That works like this:
string hashedMessage = sha256( messageToHash );
Then to sign the message you'll use the sign function that is in the same cpp file. You will use the from address as the key. The sign message will return an unsigned int. You can sign the hashedMessage like this:
unsigned int signID = sign( hashedMessage, from );
These functions are provided for you in the sha256.cpp and they are declared in the sha256.h file. Simply download them and put them in your directories. Then #include "sha256.h" and when you compile you'll need to compile the sha256.cpp along with your code.
When you receive a message in the add command, there is a supplied ID. That id is really the signed hash of the message. The message may have been modified and so you'll check the id by hashing the message and then signing it. If the id that you calculate doesn't match the one in the command, then the message is assumed to be invalid. That message will not be added to the inbox, but instead to the hacked messages list.
Requirements
You must use a struct to create the message. It must have fields for at least the from, date, to, subject, message and id. It may have other fields, but it must contain at least the ones listed here.
You may not use classes.
You must use a pointer to an array of your message struct. This array must be dynamically allocated. The initial size of the array is 10. You must double the size when you grow.
You may not use a vector, list or other container class from the STL.
You may not use global variables.
You must comment your code following the code style guidelines found in Canvas.
You must implement the function void mailbox( string input, string output ) and that function must be declared in a header called mailbox.h
You must use functions where appropriate
When you remove you must slide down over the empty spot. Do not swap with the end.
All project work is independent.

+q 634103047

不要沉啊

小学生作业自己做，没有人喜欢伸手党。