Author: Uri Blass
Date: 06:40:17 09/24/03
Go up one level in this thread
On September 24, 2003 at 09:01:12, Tim Foden wrote: >On September 24, 2003 at 07:43:33, Uri Blass wrote: > >>I was told that unsigned varaibles are better to use in every case that I can do >>it. >> >>one of the varaibles that cannot get negative value is the ply of the search but >>the problem is that this varaible is connected with beta because I tell movei >>always that beta cannot be more than 9999-ply >> >>How do you solve that problem? >> >>practically I was too lazy to replace all my varaibles and decided only to >>replace few varaibles and remember that rule for new varaibles. >> >>It was another varaible that I defined as unsigned and was connected with ply >>and when I got the warning >>signed/unsigned mismatch I tried to change ply to be unsigned and got more >>warning of the same kind because beta is unsigned. > >How can beta be unsigned? It doesn't seem to make sense to be to have an >unsigned beta. Maybe you meant to say signed here? You are right beta is signed when ply is unsigned or should be unsigned. > >> >>I can get rid of the warning by adding signed. >> >>if (beta>9999-(signed)ply) >> beta=9999-(signed)ply; >> >>I doubt if it is a good idea and it is possible that the conversion is going to >>cost time for the computer. > >No, AFAIK, it should not cost any time in this case. It just changes the way >the compiler thinks about the ply value. It doesn't actually convert a value >from unsigned to signed. It just causes the value to be interpreted as signed >where it was previously interpreted as being unsigned. > >Cheers, Tim. Thanks. I guess that you are right. I had no idea about the way that the computer works and I thought it may need more time to use value as signed when it usually use it as unsigned. Uri
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