Question

i want to write a program in c to show a perfect numbers between 1 to 10000 and i don't know how to start

Answer 1

Some assumptions:
You know C language
You know how to formulate these perfect numbers

A good place to start is with a pen and paper to outline all of the steps you would take to produce these numbers, then some sudo code, then actual code.

Answer 2

i am having difficulty with the perfect numbers concepts

Answer 3

Well a quick search through wikipedia shows that a perfect number is 2^(p−1)(2p−1), so this could be done easily with a loop.

Answer 4

The previoius is for even perfect numbers and from the looks of it finding an odd perfect number will require quite a bit more work.

Answer 5

The program has no user input.
Using the 'Mersenne exponential method' involves the simple implementation of a formula with a lookup table. This bypasses the usefulness of the assignment - namely the learning of loop and conditional statements (while, at the same time, avoiding the use of pointers). Therefore, using this method is not adequate to pass the assignment - you must test each integer individually for its 'perfectness'.

Answer 6

Well you could start with a nested loop:
for (i = 1; i< 1000;i++){
for(j=1; j< 100; j++){
num = i^j(i^(j+1)-1);
printf("The number %d to the power of %d is: %d\n",i, j, num);
}
}

This would run every number between 1 and 1000 through the formula described for the even set of perfect numbers. As for the check, that gets a little more specific and depends on what all the assignment entails.

Answer 7

http://en.wikipedia.org/wiki/Perfect_number
You will also need to check if the number (j) is prime.

Answer 8

Oh, here ya go. http://mathforum.org/dr.math/faq/faq.perfect.html#calculate

Answer 9

thank you my friend
i am gone do some reading and then start trying

Answer 10

:) You're welcome.

Answer 11

well start to write your static array , that would be a really good start :)

Answer 12

i ges u gat all help u needed......