WHILE loop freezes

my while loop freezes for some reason unknown to me. I have tested the same loop in an excel spreadsheet and in VBA and it works. I am missing something, not sure why. The code (for an excel add-in) is below:

double dy = fabs(RGWci-RGWI-RGWD+RGWX);
     while (dy>RGWepsilon && (RGWHighS-RGWLowS)>RGWepsilon);
               RGWHighS = RGWI;
               RGWLowS = RGWI;
          RGWI = (RGWHighS+RGWLowS)/2;
          RGWci = *ad_GBS("call","stock",RGWI,RGWX,RGWvol,RGWR,0,(RGWT-RGWt),"value");
          dy = fabs(RGWci-RGWI-RGWD+RGWX);
Any help welcome, thanks.
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Mayank SAssociate Director - Product EngineeringCommented:
>> while (dy>RGWepsilon && (RGWHighS-RGWLowS)>RGWepsilon);

Remove the semi-colon at the end of this line!

Mayank SAssociate Director - Product EngineeringCommented:
In continuity with my last comment - the condition is always remaining true as it is never entering the { .. } block after the while loop but is stopping at the ';' (null statement) and then looping forever as the variables are not being modified at all.


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decornezAuthor Commented:
Yes, that was clearly the problem. Thanks a lot, can't believe I missed that ! ahahaha Always good to have another pair of eyes. Well done.
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