Check that enter number is even , odd or prime ............unless the user press (n)

#include <iostream>

using namespace std;

void main ()

{

char test='y';

int i=1;

int ans=0;

int counter=0;

for (int j=1; j<=2;) // for repeat the Q again and again

if (test=='y' || test=='Y')

{

cout<<"Please enter the number here:";

int number;

cin>>number;

if (number<0) // check a positive number

cout<<"You can only enter a positive number"<<endl;

else 

{

if (number==1)

cout<<"The number is prime."<<endl;

else

{

while (i<=number)

{

if (number%i==0)

 counter++;

  i++;

}

}

if (counter==2)

 cout<<"The number is prime"<<endl;

if (number%2==0) // for even number

cout<<"The number is even..."<<endl;

else 

cout<<"The number is odd..."<<endl;

cout<<"Press Y to continue and N to end: ";

cin>>test;

}

}

else

break;

cout<<"\nThank you for using this...";

}