program c++ cek bilangan prima

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

main() {
int input,hitung=0,i=1,b=2;
cout<<"inputkan angka =";cin>>input;
if(b==2)
{cout<<b<<" ";
b++;
i++;}
while (i<=input);
{
      for (int z=2;z<b;z++)
      {
          if (b%z==0)
          {hitung++;}
          }
          if (hitung==0)
          {cout<<b<<" ";
          i++;
          b++;}
          if (hitung>0)
          {b++;
          hitung=0;}
          }
          getch();
          }

#include <conio.h>
#include <iostream.h>
using namespace std;
int main(){
 int x,a,b;
 char i;
 {
 i1:
 b=1;

 system("cls");
 cout<<"PROGRAM UNTUK MEMERIKSA BILANGAN PRIMA"<<endl<<endl;
 cout<<"Masukan Bilangan Untuk di Cek:";
 cin>>x;
 cout<<endl;
 for (a=2;a<=x-1;a++)
 {
 if (x==2)
 break;
 if(x%a==0){
 b=0;
 }
 }
 if(b==1)
 {
 cout<<x<<"\nMerupakan bilangan Prima\n";
 }
 else
 {
 cout<<x<<"Bukan Merupakan Bilangan Prima";
 }
 if(b==0)
 cout<<endl;
 cout<<endl;
 cout<<endl;
 cout<<"Ulangi(y/n ?)";
 cin>>i;
 if(i=='y')
 goto i1;
 else
 cout<<"Terima Kasih";
 }

 system("PAUSE");
 return EXIT_SUCCESS;
}