prime or not prime

#include<iostream.h>
#include<conio.h>
void main()
{
int n, s=0,i;
clrscr();
cout<<"Enter the number"<<endl;
cin>>n;
for(i=2;i<n/2;i++)
{
if(n%i==0)
 s++;
}
     if(s>=1)
     cout<<"The entered number is not prime"<<endl;
     else
     cout<<"The entered number is prime "<<endl;
     getch();
}