Urgent...plz help me....

[Shap3r]

Now im facing few problems in my assignment. I don't know how to solve it. I show u guys those problems, hope u guys know how to solve it and write down the code as well. I appreciate alots. I need it by this coming Monday, 6th August, 07. Im not a programming student, that why im not so familiar which those problems. But i need to hand up a proper answer to complete my assignment. The header file must be "#include <iostream>" by using cout&cin, and in my opinion, those 2 problems need use arrays and pseudo-random numbers functions.

Problem 1:
Problem 1
A company wants to transmit data over the telephone, but is concerned that its phones could be tapped. All of the data are transmitted as four-digit integers. The company has asked you to write a program that encrypts the data so that it can be transmitted more securely.

Your program should read a four-digit integer and encrypt it as follows:
1. Replace each digit by( the sum of that digit plus 7) modulus 10.
2. Then, swap the first digit with the third, swap the second digit with the fourth and print the encrypted integer.

Pseudo code for encryption:
1. The user would initially be asked to enter a four-digit integer.
2. The integer is assigned to variable.
3. The program identifies (extract) each digit from the integer variable.
4. Each identified digit is reassigned to another variable respectively (there should be 4 variable, one variable for each digit) E.g. digit1, digit2, digit3, digit4.
5. Each digit is encrypted with the following formula: (n+7)%10
6. Swap the encrypted first and third digit.
7. Swap the encrypted second and fourth digit.
8. All encrypted individual digit are reassigned back to a single integer variable to form an four-digit encrypted integer.
9. Show the encrypted integer.

Write a separate program that inputs a four-digit encrypted integer and decrypts it to form the original number.

Pseudo code for decryption:
1. The user would initially be asked to enter a four-digit encrypted integer.
2. Decrypt the four-digit encrypted integer using your own algorithm.
3. All decrypted individual digits are reassigned back to a single integer variable to form an four-digit decrypted integer.
4. Show the decrypted integer.


Problem 2:
Problem 2
Write a C++ Program that will randomly generate a number range from 0 to a user defined number as limit. (Example: 0-534534555353), then the program will allow user to select how many tries they would like to have to guess for that number.

The program written must be able to provide useful information for the user to guess that number. For example, if the number entered by the user is too small than the actual number, a message “Too small” will be displayed to hint the user. The subsequent relevant messages should be keep display to guide the user getting closer to guessing number.

[John]

While posting keep in mind a few things:

-Phrases like "Help me its urgent" or "I'm a n00b who needs help" are generally ignored by the people who know how to answer your question.

-97% of the time, when you say: "this is a homework assignment can you show me what to do" you wont receive any responses.

We all have had homework assignments and deadlines to make, but homework is assigned for a reason, either to reinforce what you learned in class, or force you to open your text book and learn it yourself, but ultimately its your work.

-Finally, if you expect us to show sympathy, at least show us you tried, even if it means posting the most absurd code that is totally wrong. At least it shows you tried.

[WingedPanther]

Hint on problem 1) use modulus and integer division by powers of 10 to capture the 4 individual digits.

Hint on problem 2) get information on random number generation in C++.

[Shap3r]

i wanna ask...
izit got many style/pattern to write a c++ code??
i had asked my frens...
he use other matter to write the coding...
and i dunno how it is...
im using "#include <iostream>" and cin&cout...
and the hints u had given to me...
izit by using cin&cout to input or output the command??
coz i never seen it before...
anyway, thx for u help....

[ebrizzlez]

Ok. Well.. in C++ there are a bunch of ways an styles to do one given task. The iostream is a basic libary, you cant really do much with it besides give an output or input data using its stream, I recommend learning more about C++. You can go use different libaries and so forth and even different enviroments, Qt is pretty good with GUI for example, its libaries are compacted with advance methods of Signals and Slots making GUI more powerful and capable. You should google up C++ libaries or just learn more about the other libaries of C++.

But.. if your not allowed to use other headings then try to use intergers and so forth, stuff that really dont require a heading and can be stored in a header itself, you can then use the iostream to output your information.

[Sp32]

Originally Posted by Shap3r

i wanna ask...
izit got many style/pattern to write a c++ code??
i had asked my frens...
he use other matter to write the coding...
and i dunno how it is...
im using "#include <iostream>" and cin&cout...
and the hints u had given to me...
izit by using cin&cout to input or output the command??
coz i never seen it before...
anyway, thx for u help....

No offense but I am asuming you are american your English is appauling and I am shocked that you are learning programming (:

Didn't mean that in a nasty way just saying :]

[Shap3r]

Originally Posted by Sp32

No offense but I am asuming you are american your English is appauling and I am shocked that you are learning programming (:

Didn't mean that in a nasty way just saying :]

im not a american...
i had no choice, i have to learn it....
the problem is i need some guide line to complete it...

[WingedPanther]

Originally Posted by Shap3r

i wanna ask...
izit got many style/pattern to write a c++ code??
i had asked my frens...
he use other matter to write the coding...
and i dunno how it is...
im using "#include <iostream>" and cin&cout...
and the hints u had given to me...
izit by using cin&cout to input or output the command??
coz i never seen it before...
anyway, thx for u help....

The hints I gave have to do with the processing, not how you get the data in/out. If you are having issues with getting information in/out of your program, you are going to have a lot more difficulty in processing the data. Start with getting a number to analyze and displaying it. Then, do some research on modulo and integer division. You can use those to "capture" individual digits into an array. The remaining calculations should be easy, by comparison.