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Old 01-03-2011, 02:39 PM
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M.Arsalan Qureshi

 

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Default Program to enter an integer and print if it is prime or composite


Program to enter an integer and print if it is prime or composite

#include <iostream.h>
#include <conio.h>
#include <process.h>

void main()
{
clrscr();
int num1,x;
cout << "Enter an integer : " << endl;
cin>>num1;
for(x=2;x<num1;x++)
{
if(num1%x==0)
{
cout << num1 << " is a composite number." << endl;
getch();
exit(0);
}
else
{
cout << num1 << " is a prime number." << endl;
getch();
exit(0);
}
}
}
This program takes in an integer num1 as a screen input from the user.
It then determines whether the integer is prime or composite.
It finally outputs the approriate message by writing to the 'cout' stream.

Sample Input
23
Sample Output
23 is a prime number.
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Old 22-11-2011, 07:45 PM
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Default Re: Program to enter an integer and print if it is prime or composite


Don't you think, this program will check even and odd numbers instead of composite and prime?

---------- Post added at 07:45 PM ---------- Previous post was at 07:42 PM ----------

ok, got it ... this will work fine :p
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composite, enter, integer, prime, print, program


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