problem with IF ELSE statement

[nyak]

Hi to you all

This is my input taken from a txt file:

04001200602151430012000005
04001200602151430000014005

the result I need is:

04001200602151430006006005
04001200602151430007007005

I wrote this code, but the ELSE condition is never "used":

x=substr($i,18,3)
y=substr($i,21,3)
{if(x!=000){y=x=x/2}; else x=y=y/2;}
{print substr($i,1,17) x y substr($i,24,3)}

The result I get is:

04001200602151430006006005
04001200602151430000000005

Why does this happen?

 

[feherke]

Hi

If only one of x or y can be non-zero, then I would let the [tt]if[/tt] out :

{
  x=substr($0,18,3)
  y=substr($0,21,3)
  printf "%s%03d%03d%s\n",substr($0,1,17),(x+y)/2,(x+y)/2,substr($0,24,3)
}

Regarding your syntax, either :
[ul]
[li][tt]if (x!="000") { y=x=x/2 } else x=y=y/2 [gray]# no semicolon ( ; )[/gray][/tt][/li]
[/ul]
[ul]
[li][tt]if (x!="000") y=x=x/2; else x=y=y/2 [gray]# no braces ( {} )[/gray][/tt][/li]
[/ul]
There you can also see your bug's solution : 000 is numeric 0, not string "000".


Feherke.

http://free.rootshell.be/~feherke/

 

[nyak]

thank you very much! your help has been very useful!
an '(x+y)/2' is definitely better than an if else statement

thanks again!

Paolo