Well, friend, I wish I knew how to solve your problem. Sadly, I doubt that it's solvable. From what I've read, it seems that floating point numbers are seldom exact. One book, Michael Covington's "Prolog in Depth," I think, I read that since floating point numbers are often not equal to each other, it's a good idea not to test them for equality. It seems better to test them using >=, <=, or !=. Some author, perhaps Covington. wrote that some Prolog programs consider two floating point numbers equal when the difference between them is less than some tolerance. I suspect your problem arises because word lengths limit the the precision of floating point numbers that a computer can represent. There are other problems, too, I'm sure. I've heard of some programming languages that allow floating point numbers that can have almost unlimited precision because those languages represent floating point numbers as lists of integers or as integers in binary coded decimal form. Hope this helps. Bill Abuzer Salik writes: Hi, I have an application which uses double values a lot. If I try to put say 401.74 in a double variable it is getting stored as 401.74000000000001 which creates problem in the calculations down the line. ( I am checking these values using gdb debugger). So, I am wondering if there is a way by which I can store the correct values (i.e. 401.74) in the double. We are using g++ compiler on Linux box. Do we need to look for another compiler/hardware or current setup can handle this? Any suggestion/solution is highly appreciated. "Pro-choice?" Then click here. http://cathinsight.com/morality/saying.htm "Men must look for the peace of Christ in the Kingdom of Christ... When once men recognize, both in private and in public life, that Christ is King, society will at last receive the great blessings of real liberty, well-ordered discipline, peace and harmony." Pope Pius XI
