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Old 01-30-2009, 01:40 PM   #1
palisetty_suman
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Registered: Feb 2007
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Thumbs up Program doesn't print output


Hi,
I have written a program on c++. It doesn't give any errors but it does't give any output.my code is as follows.It is to print prime numbers from 3 to 100.

------------------------------------------------------------------

#include<iostream>
using namespace std;
int main()
{
int i,j,num,k;
cout<<"Enter the prime range number"<<endl;
cin>>num;
for(i=3;i<=num;i++)
{
for(j=1;j<=i;j++)
{
if(i%j==0)
k++;
}
if(k==2)
cout<<i<<endl;
}
}
---------------------------------------------------------------------
Please help me out.
 
Old 01-30-2009, 01:56 PM   #2
dorian33
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'k' is not initalized, so what 'k++' does mean?
 
Old 01-30-2009, 01:59 PM   #3
palisetty_suman
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k

K is just like counter. K is initialised.
int k; which is equal to k=o.

The problem is with returning value I guess. Please check there.
 
Old 01-30-2009, 02:12 PM   #4
dorian33
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Quote:
Originally Posted by palisetty_suman View Post
int k; which is equal to k=o.
Really?
So try this:
Code:
#include<iostream>
using namespace std;
int main(){
 int k;
   cout<<k<<endl;
}
 
Old 01-30-2009, 02:21 PM   #5
palisetty_suman
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Distribution: fedora
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Dorian,
I tried what you said and for k, i am getting some value 1262164 but not 0. I am wrong with that. I accept but I should get some or the other answer for it. Isn't it. Now I will initialize k to 0.
 
Old 01-30-2009, 02:26 PM   #6
palisetty_suman
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Location: TX, USA
Distribution: fedora
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I have changed my code to this and I am able to print only 3. Please predict where is the mistake i am doing.

-------------------------------------------------------------------------------------


#include<iostream>
using namespace std;
int main()
{
int i,j,k=0;
for(i=3;i<=100;i++)
{
for(j=1;j<=i;j++)
{
if(i%j==0)
k++;
}
if(k==2)
cout<<i<<endl;
}
}



-----------------------------------------------------------------------------------------
 
Old 02-01-2009, 06:59 PM   #7
paulsm4
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Hi -

If you want help (especially help with homework), please:

1. Put your code in code blocks
2. Explain more about what you're trying to get your code to do
For example, add a few comments at important places in your program.
3. Q: what does "k==2" mean (in terms of your program)?
How does it relate to a "prime number"?
Do you expect "k==2" to occur many times, or just once in your program?
 
Old 02-01-2009, 07:50 PM   #8
palisetty_suman
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Distribution: fedora
Posts: 191

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Thumbs up Prime numbers

I am able to run the program. Thanks.I got the result.
 
  


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