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Awk script help

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# 1  
Old 09-19-2005
Awk script help
I want to search a file where the 4th field begins with 03: and then print the line and the following 14 lines.
I can find the 4th field using awk but then I just get the same line repeated 14 times.
BEGIN {FS=OFS=" "}
{
tsttxt=substr($4,1,3)
if( tsttxt == "03:" )
{print
for (i = 1; i <= 13; i++)
print
}
}


Any Ideas welcome.

thanx
# 2  
Old 09-19-2005
Quote:
Originally Posted by Mudshark
I want to search a file where the 4th field begins with 03: and then print the line and the following 14 lines.
I can find the 4th field using awk but then I just get the same line repeated 14 times.
BEGIN {FS=OFS=" "}
{
tsttxt=substr($4,1,3)
if( tsttxt == "03:" )
{print
for (i = 1; i <= 13; i++)
print
}
}


Any Ideas welcome.

thanx
You need to add getline to your for loop.
Code:
BEGIN {FS=OFS=" "}
{
tsttxt=substr($4,1,3)
if( tsttxt == "03:" )
{print
for (i = 1; i <= 13; i++) {
    getline
    print
}

}
}

# 3  
Old 09-19-2005
Quick explanation: "print" is only working on the current input line; "getline" switches the context to the next input line.
# 4  
Old 09-19-2005
Thanks tmarikle -
Its close but not quite - I now get the line with 03: in the 4th field and then just the 13th line after it.
I tried moving the {} around but to no good effect. I need the getline and the print $0 to act together ..

BEGIN {FS=OFS=" "}
{
tsttxt=substr($4,1,3)
if( tsttxt == "03:" )
{print $0
for (i = 1; i <= 13; i++)
getline
print $0
}
# 5  
Old 09-19-2005
You missed the braces { } that I added to your for loop so that both "getline" and "print" are performed for each loop iteration.
# 6  
Old 09-19-2005
Working At Last
I think this works

BEGIN {FS=OFS=" "}
{
tsttxt=substr($4,1,3)
if( tsttxt == "03:" )
{print $0
for (i = 1; i <= 13; i++)
{ getline ;print $0 }
}
}
# 7  
Old 09-19-2005
The script should work as I modified it. "print $0" is the same as "print" in your script's case. The missing element when you tested it was the braces following the "for" loop.
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