C++

[Slinky]

Im making this topic because i suck at C++ and i dont want to fail the class that im in so if any of you guys know anything id appreciate the help.

[Slinky]

Exercise-3. Prime numbers

Write a program that finds and prints the first 25 prime numbers, five numbers per line.

Use the following logic: Let N be a number you wish to examine if it is a prime number. For this you check if that number is exactly divisible by any of the numbers from 2 to N/2. Once you find it is divisible, you can stop going further since that number is not a prime number. However, if the number is not exactly divisible by any of the numbers from 2 to N/2, then it is a prime number. You need to keep a count of the prime numbers found since you need just the first 25 prime numbers only.

how do you do this part?

[dwright27]

FUCK!

wish i could help.

1 3 5 7 11 17 23 29 31 34 37 39 41 43 47 51 53 57 59 61 69 71

something like that ^^^^

[Slinky]

lol. thanks man. i got my program to list the prime numbers but i dont know how to make it to where there is 5 columns.

[dwright27]

maybe under format or something?

if theres a format?

then columns?

[Slinky]

i need to get this list into 5 columns

here is my code so far

/** Lab-5: lab5-3.cpp : Prime numbers

*Author: -(Replace this with your name here)

* Date: (replace this with today’s date)

*********************************************************/

#include <iostream>

#include <string>

#include <iomanip>

using namespace std;

int a, b, c;

int main ()

{

const int NUMBER_OF_PRIMES = 25;

const int NUMBER_OF_PRIMES_PER_LINE = 5;

int count = 0; // for counting the prime numbers

int number = 2; // starting number for prime number checking

cout << "The first 25 prime numbers are: " << endl;

cout<<endl;

for (a=3; a <= 125; a++)

{

for (b = 2; b < a; b++)

{

if ((a% == 0)

c = 0;

}

if (c != 0)

cout << a << endl;

c=1;

}

return 0;

}

Edited March 4, 2008 by Slinky

[Guest MegaloManiac]

i can solve this for you, but you will have to throw some money towards my way via paypal cause it is considered cheating

Edited March 4, 2008 by MegaloManiac

[Torres]

i can solve this for you, but you will have to throw some money towards my way via paypal cause it is considered cheating

lolol so shady...

[RollinSoLow]

lolol so shady...

sounds like my sons report card c+ f c- f c +

[Guest MegaloManiac]

eitherway my offer is on the table its up to him. i do have the code done