"Error: Compile Error: Constructor not defined: [acccont].<Constructor>(ApexPages.StandardSetController) at line 5 column 34"

public class acccont {
public acccont(ApexPages.StandardController controller){}
public list<acccont> zsubLst{get;set;}
public ApexPages.StandardSetController cont {
get {
if(cont == null) {
cont = new ApexPages.StandardSetController(Database.getQueryLocator([select,id,name(Select id,Firstname from Contacts) From Account where Accountid = :ApexPages.currentPage().getParameters().get('id') AND Status__c = 'Active']));
}
return cont;
}
set;
}
public List< acccont > samp{
get
{
cont.setPageSize(5);
return (List<acccont>) cont.getRecords();
}
}
// returns the first page of records
public void first() {
cont.first();
}
// returns the last page of records
public void previous() {
cont.previous();
}
public void last() {
cont.last();
}
public void next() {
cont.next();
}
public Boolean hasNext {
get {
return cont.getHasNext();
}
set;
}
// indicates whether there are more records before the current page set.
public Boolean hasPrevious {
get {
return cont.getHasPrevious();
}
set;
}

}

@isTest(seealldata = true)
private class acccontTest {
static testMethod void testsub(){
List<acccont> lst =[select,id,name(Select id,Firstname from Contacts) From Account where Accountid = :ApexPages.currentPage().getParameters().get('id') AND Status__c = 'Active']);
acccont sc = new acccont(new ApexPages.StandardSetController( lst ));
}
}