# Odd numbers

apollo abel

Ranch Hand

Posts: 32

posted 10 years ago

Here's one way: Start with an even or odd (0 or 1), depending on what you want. Then instead of incrementing by one using i++, increment by two using i+=2.

Here's another way: Increment i as before. Then int odd = (2*i) + 1.

[ April 11, 2006: Message edited by: marc weber ]

Here's another way: Increment i as before. Then int odd = (2*i) + 1.

[ April 11, 2006: Message edited by: marc weber ]

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apollo abel

Ranch Hand

Posts: 32

posted 10 years ago

this is what i got:

Enter a number:

28

The perfect numbers are: 6

The perfect numbers are: 28

The Abundant numbers are: 14

The Abundant numbers are: 20

The Abundant numbers are: 26

though i need the odd numbers

thanks for the support

EDIT: actually thats an error, 14 is not an abundant number, the factors of 14(not counting the number itself) are 2+7=9<i, and it needs to be >i

[ April 11, 2006: Message edited by: apollo abel ]

this is what i got:

Enter a number:

28

The perfect numbers are: 6

The perfect numbers are: 28

The Abundant numbers are: 14

The Abundant numbers are: 20

The Abundant numbers are: 26

though i need the odd numbers

thanks for the support

EDIT: actually thats an error, 14 is not an abundant number, the factors of 14(not counting the number itself) are 2+7=9<i, and it needs to be >i

[ April 11, 2006: Message edited by: apollo abel ]

Garrett Rowe

Ranch Hand

Posts: 1296

apollo abel

Ranch Hand

Posts: 32

posted 10 years ago

well this is what i ended up with:

What is your name?

neo

Enter a number:

5000

6: Perfect number

28: Perfect number

496: Perfect number

945: Odd abundant number

1575: Odd abundant number

2205: Odd abundant number

2835: Odd abundant number

3465: Odd abundant number

4095: Odd abundant number

4725: Odd abundant number

do you guys thing the answer is right??

What is your name?

neo

Enter a number:

5000

6: Perfect number

28: Perfect number

496: Perfect number

945: Odd abundant number

1575: Odd abundant number

2205: Odd abundant number

2835: Odd abundant number

3465: Odd abundant number

4095: Odd abundant number

4725: Odd abundant number

do you guys thing the answer is right??

posted 10 years ago

Well, it found the 3 perfect numbers in that range (the 4th isn't until 8128). And it found the first abundant odd number, 945, as well as odd multiples of 945 within range, 2835 and 4725. So the results

The real questions are:

How confident are you in your algorithm? Do you have a way to verify test results? (If this page is accurate, there are 2487 abundant numbers below 10,000. You might try using your code to count these, and see if you get the same result.)

[ April 11, 2006: Message edited by: marc weber ]

Originally posted by apollo abel:

...do you guys thing the answer is right??

Well, it found the 3 perfect numbers in that range (the 4th isn't until 8128). And it found the first abundant odd number, 945, as well as odd multiples of 945 within range, 2835 and 4725. So the results

*look*plausible.

The real questions are:

[ April 11, 2006: Message edited by: marc weber ]

*~Joe Strummer*

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