awk files

alaios · 04-28-2003, 09:56 AM

What are the differences between the 2 awk files . ¶I can not find them

Tinkster · 04-28-2003, 03:11 PM

HUH?

Which files, what are you talking about?

Cheers,
Tink

alaios · 04-28-2003, 03:38 PM

oups i dit it again

A) /^$/ {
print x += 1
}

Â) /^$/ {
print x++
}

Tinkster · 04-28-2003, 03:47 PM

Kalimera! :)

I'm not an expert in awk <grin> but
in C/C++ "x += 1" and "x++" can be
used synonymously...

Cheers,
Tink

alaios · 04-29-2003, 02:18 PM

where are u from tinkster?
Geia sou ellada!!

wapcaplet · 04-29-2003, 02:38 PM

It looks like they're both the same. In C/C++, at least, I think they'd do the same thing.

print x++ prints x, then increments (post-increment, they call it)
print ++x increments x, then prints (pre-increment I guess)

Don't know if the same applies in awk though.

Tinkster · 04-29-2003, 03:18 PM

Quote:

Originally posted by alaios
where are u from tinkster?
Geia sou ellada!!

Living in New Zealand :)
But I used to do classical greek at Uni,
and spent a beautiful holiday in the
greek part of Cyprus once :}

Yassou,
Tink

realos · 05-13-2003, 05:56 AM

hi alaios,

"print x +=1;" is same as "print ++x;" or "print x =x+1;" whereas "print x++" could be substituted by "print x +=0;" or "print x =x+0;"

Hope you get the idea.

A) /^$/ {
print x += 1
}

B) /^$/ {
print x++
}

Thus A would print the number of empty lines beginning with 1 whereas B would begin with 0.