program mengecek suatu bilangan dalam C++

#include<iostream.h>

#include<conio.h>

using namespace std;

int main()

{

                int bil, jum, i;

                jum = 0;

                cout<<"\t\t===PRORGAM MENGECEK SUATU BILANGAN==="<<endl<<endl;

                cout << "Input bilangan yang ingin kamu cek : ";

                cin >> bil;

                if (bil==0)

                                exit(0);

                                cout<<"\njadi angka "<<bil<<" termasuk bilangan :"<<endl;

                for (i=1; i<=bil; i++)

                if (bil%i==0)

                                jum++;

                if (jum==2)

                                cout << "\n\t\t\t\t[] bilangan prima "<<endl;

                else if(jum!=2)

                                cout << "\t\t\t\t[] Bukan prima "<<endl;

                if (bil>0)

                                cout<<"\t\t\t\t[] bulat positif"<<endl;

                else if (bil<0)

                                cout<<"\t\t\t\t[] bulat negatif"<<endl;

                if(bil%2==0)

                                cout<<"\t\t\t\t[] genap"<<endl;

                else if (bil%2!=0)

                                cout<<"\t\t\t\t[] ganjil"<<endl;

getch();

return 0;

}