how to get appointed colums?

file1

Code:

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1275 14.88 0.51 0.51 Contig_000000006 202 397 (38) rnd-1_family-87#LTR/Gypsy 1019 1214 (214) 5
269 18.42 5.13 2.56 Contig_000000006 338 415 (20) C rnd-1_family-1089#Unknown (3) 200 121 5

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I want to get the fifth column the sixth column(separated by blank), how can I do ?
result as follows

Code:

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Contig_000000006 202
Contig_000000006 338

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Exactly how you could do it, depends on how you're dealing with these data items, now.

You might read in the current data, and then write it back out, in the order you want it to be in.

Code:

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awk '{ print $5 $6 }' file.txt

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Just like you would do it in C, except that
- opening files
- reading lines
- splitting into fields
is all part of AWK, and something you have to do yourself in C.

Quote:

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Originally Posted by Adak

Exactly how you could do it, depends on how you're dealing with these data items, now.

You might read in the current data, and then write it back out, in the order you want it to be in.

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can I use fscanf function?
is it efficiency?

Yes,
and No.

Without code, it's not practical to give detailed advice. Post your code, and then we can talk "turkey".

C is efficient, and so is scanf(). The only thing C is less than efficient with, is in certain string handling routines. If you have very long strings, use blocks of memory, and pointers - but it's not as easy as doing it with a language that supports a native string data type.

Quote:

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Originally Posted by Adak

Without code, it's not practical to give detailed advice. Post your code, and then we can talk "turkey".

C is efficient, and so is scanf(). The only thing C is less than efficient with, is in certain string handling routines. If you have very long strings, use blocks of memory, and pointers - but it's not as easy as doing it with a language that supports a native string data type.

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Code:

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fscanf(fp,"%d %f %f %f %s %d %d %s %s %s %d %d %d %d",&b,&a,&a,&a,r_name,&r_start,&r_end,c,r_fam,c,&b,&b,&b,&b);

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