请写出下述程序的输出结果( )。classCounter{inti=0;}publicclassReference{publicvoidplus(inti){i++;}publicvoidplus(Counterc){c.i++;}publicvoidcreate(Counterc){c=newCounter();c.i++;}publicstaticvoidmain(String[]args){inti=0;Referencer=newReference();Counterc1=newCounter(),c2=newCounter();r.plus(i);System.out.print(i);r.plus(c1);System.out.print(c1.i);r.create(c2);System.out.print(c2.i);}}