public BasePlusCommisionEmployee(String baseName, String baseLastName, String baseSsn, double gross, 
			double comRate, double bSalary) {
		
		firstName = baseName;
		lastName = baseLastName;
		socialSecurityNumber = baseSsn;
		setGrossSale(gross);
		setCommisionRate(comRate);
		setBaseSalary(bSalary);
		
	}
	// bu ust kisim constructor
	
	public void setGrossSale(double gross) {
		if(gross < 0) {
			System.out.println("Invalid gross sales... Program is terminating");
			System.exit(1);
		}
		grossSales = gross;
	}
	// bu kisim programi sonlandiran setter