The purpose of this assignment is to give practice programming in writing functions, developing algorithms and using
loop structures.
Positive integers can have the following personalities: prime or composite, happy or unhappy, square or not
square, smug or not smug, and honest or dishonest.
You will write a C++ program which will contain the following functions : isPrime, isHappy, isSquare, isSmug,
isHonest. All of the functions return boolean (i.e. true or false).
Note that, in numberPersonalities.cpp, all of methods currently return false. This done so that your program
can compile while you work on one method at time.
Personality Description
1. Prime and composite numbers
A positive number is prime if its only positive divisors are itself and one. For example, 7 is prime because it is
evenly divisible by 1 and 7, but not by any number in between (in particular, it is not evenly divisible by 2, 3, 4, 5,
or 6).
A positive number is composite if it is not prime. For example, 10 is composite because it is evenly divisible by 2
and 5; 12 is composite because it is evenly divisible by 2, 3, 4, and 6. As a special case, 1 is considered to be
composite.
2. Happy and unhappy numbers
Repeatedly apply the following procedure to a number:
1. Square each of the digits of the number.
If by doing this you eventually get to 1, then the number is happy.
• 1*1 + 3*3 = 1 + 9 = 10
• 1*1 + 0*0 = 1 and the number is happy.
If instead you get into an infinite loop, the number is unhappy. So if your program runs forever, the number is
unhappy. This isn't a very useful test, however. Fortunately, every unhappy number will eventually get into this
cycle:
4, 16, 37, 58, 89, 145, 42, 20, 4, ...
so if you get any one of these numbers, then you can stop and conclude that the number is unhappy. Doing
this in your method is fairly simple because all of the above numbers in the cycle will give you 4. For this
reason, to check if a number is unhappy, just compare the sums of squares of its digits with 4. If you get 4,
then number is unhappy.
Programming note : You can get the last digit of a number n with the expression (n % 10). You can subsequently
discard this digit by doing an "integer division" by 10; when you get a zero, there are no more digits.
3. Square numbers
A square number is a number of the form 1 + 3 + 5 + 7 + ... + n, for some odd positive n. (The
figure should help you understand why this definition is the same as the usual definition of square
numbers.)
4. Smug numbers
A number is smug if it is the sum of two square numbers. The first few smug numbers are 2(1+1), 5 (1+4), 8
(4+4), 10 (1+9), 13 (4+9), etc.
5. Honest and dishonest numbers
A number is dishonest if it "pretends" to be a square number, but isn't one. Specifically, n is dishonest if there
is a number k such that n/k = k (using integer division), but k*k is not n. A number is honest if it is not dishonest.
Final Output
For each of the numbers 1 through 100, you will test the methods (functions) you developed and according to
the method return values, print out the numbers, one per line, along with a list of its characteristics (on the
same line).
Your output should look approximately like this:
1 composite, happy, square, not smug, honest
2 prime, unhappy, not square, smug, honest
3 prime, unhappy, not square, not smug, honest
4 composite, unhappy, square, not smug, honest
5 prime, unhappy, not square, smug, dishonest
...
Hence you need to also write a main method that will declare a variable as int limit = 100; and test the numbers 1 through
limit, inclusive. This makes it easy to change the limit later. Also test your program with two or three large numbers (say,
five or six digits), to make sure that your program can handle them.
Program skeleton
Your program must follow the structure given in the NumberPersonalities.cpp (that is, you need to fill in the blanks
ONLY ..

/*-------------------------------------------------
* CSE1101 Introduction to Programming Homework 2
* Author:
* Date:
*
*--------------------------------------------------*/
#include <iostream>
using namespace std;

//This method checks if the number (var) is a prime or composite.
//If number is prime then it returns true (i.e.prime), else false (i.e. composite)
bool isPrime(int var) {
//Fill in the code

return false;
}//end of isPrime

//This method checks if the number (var) is a happy.
//If number is happy then it returns true, else false
bool isHappy(int var) {
//Fill in the code

return false;
}//end of isHappy

//This method checks if the number (var) is square.
//If number is square then it returns true, else false
bool isSquare(int var) {
//Fill in the code

return false;
}//end of isSquare

//This method checks if the number (var) is smug.
//If number is smug then it returns true, else false.
bool isSmug(int var) {
//Fill in the code

return false;
}//end of isSmug

//This method checks if the number (var) is honest.
//If number is honest then it returns true, else false.
bool isHonest(int var) {
//Fill in the code

return false;
}//end of isHonest

int main() {
/*
* Final Output - Sample
*
1 composite, happy, square, not smug, honest
2 prime, unhappy, not square, smug, honest
3 prime, unhappy, not square, not smug, honest
4 composite, unhappy, square, not smug, honest
5 prime, unhappy, not square, smug, dishonest
...
*
*/
//Fill in code

}

## All 11 Replies

So you have demonstrated you can copy and paste your assignments. Is there any other hidden talents you have?

So you have demonstrated you can copy and paste your assignments. Is there any other hidden talents you have?

What is also a fact is that you've shown nothing which makes you deserving of help.

A much better post would be "Here is my prime number code but it keeps showing 9 up as prime, and obviously it isn't". You've shown effort, and asked a specific question. This would get our attention.

For example, you've made no attempt at all to fill in any of the "Fill in code" sections of your assignment. In other words, this is just the boiler-plate code your tutor has handed out to everyone, which you're supposed to complete.
http://www.daniweb.com/forums/announcement8-2.html

What code there is is an unformatted mess.
http://www.daniweb.com/forums/announcement8-3.html
There are many places where you're reminded to use code tags, and you've decided to ignore all of them. What does that say about you and how much regard for the forum you might have? Are we just a bunch of geeks to be used and discarded once you've got your free ticket and you can get back to your oh-so-important partying and social life?

Oh, and putting a date on the topic is no different to saying "URGENT".
http://www.catb.org/~esr/faqs/smart-questions.html#urgent

What is also a fact is that you've shown nothing which makes you deserving of help.

A much better post would be "Here is my prime number code but it keeps showing 9 up as prime, and obviously it isn't". You've shown effort, and asked a specific question. This would get our attention.

For example, you've made no attempt at all to fill in any of the "Fill in code" sections of your assignment. In other words, this is just the boiler-plate code your tutor has handed out to everyone, which you're supposed to complete.
http://www.daniweb.com/forums/announcement8-2.html

What code there is is an unformatted mess.
http://www.daniweb.com/forums/announcement8-3.html
There are many places where you're reminded to use code tags, and you've decided to ignore all of them. What does that say about you and how much regard for the forum you might have? Are we just a bunch of geeks to be used and discarded once you've got your free ticket and you can get back to your oh-so-important partying and social life?

Oh, and putting a date on the topic is no different to saying "URGENT".
http://www.catb.org/~esr/faqs/smart-questions.html#urgent

i did only part of prime number but i haven't got any idea about the other parts you can say only how can i do other parts.. or you can't say.. it's your choice ;)

i did only part of prime number but i haven't got any idea about the other parts you can say only how can i do other parts.. or you can't say.. it's your choice ;)

You're missing the point -- we are not mind readers so we have no idea what you want. Posting your assignment is not asking for help. To get the help you want you have to ask specific questions. My guess is that your are getting overwhelmed with such a large assignment. Take it only a little bit at a time and soon you will have it done yourself.

i think if someone make a part of this i can make other parts but anyone don't say anything about how can i do... maybe someone make happy number or anything else i can do others..therefore please help me to make any part..

What have YOU done to write any of the functions? For example, isPrime? There are hundreds of programs posted here that show you how to do it so there is no point is us repeating ourselves for you. All you have to do is enter prime in the search engine and you will get lots of hits.

i know... i did it thanks to you...but if you say something about the how can i do others maybe i can do ;)

> maybe someone make happy number or anything else i can do others
So if I pick say isSmug(), then you're saying you can already do that right?

Tell me, how did you get this far into your course? This can't be the first homework assignment of the class right? Look back at how you solved(*) your previous homework assignments and draw on those experiences to at least try to solve one of the questions in front of you now.

> 2. Happy and unhappy numbers
> Repeatedly apply the following procedure to a number:
> 1. Square each of the digits of the number.
> 2. Add the squares together.
OK, how about beginning with a short bit of code which extracts each digit from a number?
Do you think you can apply /10 and %10 in a loop to do that?

(*) that is assuming you did your own homework up to now. If you've been wandering from board to board for free homework, it's now painfully obvious that you don't have a clue and deserve to fail spectacularly.

this is my second homework.. and i learn c++ since 45 days.. therefore i don't know a lot of thing about c++ .. so i wanna yours help..

Since you obviously have no intentions of helping yourself there is no point in continuing this thread, so I closed it.

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