Shell Programming and Scripting

Is that ONE record that you present in four lines in post #1? Line 1 and 3 have 110 chars, line 2 and 4 have 113 char, totalling to 446 char, not 413 nor 421. Are the lines <lf> terminated/separated, and do you count the <lf> chars (=449 in total)? There's no dashes in pos 351 to 357 (which would be line 4 pos 18 - 24), even if you'd count the <lf>s. One dash in line 1 pos 27 could be replaced, but that's all. There's no two blanks in your input example that could be replaced either.

Pls. provide a meaningful problem and an adequate input sample as well as desired output.

The latest tested code :

Code:

awk -F "" '{for(i=1;i<=NF;i++){if((i>=351 && i<=357) || (i>=24 && i <=43)){gsub("-","0",$i);} 
else if(i>=381 && i<=382){gsub("  ","04",$i);}}}1' OFS="" input_file

Thanks pamu and msabhi for you help on this.
But after executing recommended command the output file is still not giving us the expected results.1) for example position 24 to 436 values were 01234-1234,14321-2345, 12345-3236 & 01234-4237 for record 1,2,3,4. after command these values remain same.
2) Position 351 to 357 values were 0-1234567890, 002345678901, 00-456789012 & 004567890123 for record 1,2,3,4 which never got modified.
3) Position 381-382 values were " ", 02, " ", 01 for record 1,2,3 & 4. Here please ignore "" since in order to specify 2 space i used " " these 2 spaces from two record never got changed after our modifed command execution.

I have attached both input and output file for the reference. Please see the attached.
Thanks a lot for helping me out.

Try this:

Code:

awk     'BEGIN{OFS=FS=""}
         {
          if ($381$382=="  ") {$381="0";$382="4"}
          for (i= 24; i<= 43; i++) if ($i=="-") $i="0"
          for (i=351; i<=357; i++) if ($i=="-") $i="0"
         }1
        ' InputFile.dat

---------- Post updated at 05:34 PM ---------- Previous update was at 05:28 PM ----------

Input.dat and Output.dat are identical.

Code:

$ diff InputFile.dat Output.dat 
$

Thank you all for you help on this. Thanks for your time on this.
Thanks a lot RudiC and msabhi.
The code given by RudiC worked like Charm and expected.
Thank you so much for your help on this guys. You guys made my day.
-Lancesunny