Program Mencetak bilangan genap pertambahan 3 interatif & rekursif

interatif C++
#include <iostream>
using namespace std;
/* run this program using the console pauser or add your own getch, system("pause") or input loop */

int main(int argc, char** argv) {
int a;
cout<<"sampai bilangan ke- ";cin>>a;
cout<<"bilangan genap pertambahan 3 : ";
for(int i=0;i<=a;i=i+3){
if(i%2==0)
cout<<i<<" ";

}
return 0;

}

Raptor interatif