Author: Tim Foden
Date: 00:48:43 07/07/03
Go up one level in this thread
On July 06, 2003 at 23:25:00, Uri Blass wrote:
>In movei I have a number between 0 and 255 and I want to do some functions for
>every 1 that it has in its binary representation(number of functions to
>implement is the same as the number of 1's in the number and there is a
>different function based on the value of the 1)
>
>I do not like to call functions because functions use local varaibles and
>generating a copy of the local varaibles only to forget them may take computer
>time and I also do not use the functions more than once.
>
>I thought to use switch(see the code later in this post) but the problem is that
>switch continue to do everything without break and I want to have switch that
>does not continue to do everything but does not quit and simply forget about the
>fact that I called switch.
>
>Here is the type of the code that I plan to have now.
>I do not like all the if (number&2) or if (number&4) and the question is if I
>can do it faster.
>
What's wrong with doing a loop with a switch inside, Uri?
For example:
while( number )
{
i=smallestpower[number];
switch(i)
{
case 0:do list of commands
break;
case 1:do list of commands
break;
case 2:do list of commands
break;
case 3:do list of commands
break;
case 4:do list of commands
break;
case 5:do list of commands
break;
case 6:do list of commands
break;
case 7:do list of commands
break;
}
number ^= (1 << i);
}
Cheers, Tim.
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