Error: <identifier> expected
 

I'm getting Error: <identifier> expected and not sure why, any tips?

public class BioCalc
{
// instance variables
private Date myToday;//Date object today
private Date myBday;//Date object birthday
private int myDaysAlive;//birthday-today
private final int PCYCLE=23;//physical length
private final int ECYCLE=28;//emotional length
private final int ICYCLE=33;//intellectual length
/**
* Constructor for objects of class BioCalc
*/
public BioCalc(Date myToday,Date myBday)
{
//initialize instance variables
int myDaysAlive = myBday.daysBetween(myToday);//calculates days alive
}