--- trunk/OOPSE-1.0/utils/sysbuilder/BaseLattice.hpp	2004/07/28 18:42:59	1427
+++ trunk/OOPSE-1.0/utils/sysbuilder/BaseLattice.hpp	2004/07/28 20:29:49	1429
@@ -20,7 +20,7 @@ class BaseLattice{
     virtual ~BaseLattice() {}
 
     //get lattice type
-    virtual string getLatticeType() = 0;
+    virtual const string getLatticeType() = 0;
     
     int getNumSitesPerCell() {return nCellSites;}
 
@@ -29,10 +29,10 @@ class BaseLattice{
     vector<Vector3d> getLatticePointsOrt() {return cellSitesOrt;}
     
     //get lattice constant of unit cell
-    vector<double> getLatticeConstant() =0;
+    virtual vector<double> getLatticeConstant() =0;
 
     //set lattice constant of unit cell
-    void setLatticeConstant(const vector<double>& lc)=0;
+    virtual void setLatticeConstant(const vector<double>& lc)=0;
 
     //get origin of unit cell
     Vector3d getOrigin( ) {return origin;}