i have following input file...
00290002STDR000000000000000000000000000EOD END TRANSACTION ^@^@^@^@^@^@^@^@^@^@^@^@^
00299998STDR070000000007000000000000000STANDING DEBITS ^@^@^@^@^@^@^@^@^@^@^@^@^
00299999STDR160000000016000000000000000STANDING CREDITS ^@^@^@^@^@^@^@^@^@^@^@^@^
00300000 000000000000000000000000002TDS 15H LIMIT DETAIL ^@^@^@^@^@^@^@^@^@^@^@^@^
00300010DFC 010000000001000000000000001CASH DEPOSIT ^@^@^@^@^@^@^@^@^@^@^@^@^
00300015DFM 000000000001000000000000002MULTI DEPOSIT ^@^@^@^@^@^@^@^@^@^@^@^@^
00300016DFC 010000000001000016000000002CASH DEPOSIT FOR FC ACCTS ^@^@^@^@^@^@^@^@^@^@^@^@^
$1 taken from user will be matched with 00016 (cut -c 4-8)
here i have to cut -c 40-86 to display CASH DEPOSIT FOR FC but the condition is that first 3 characters must be 003.
in short..
display CASH DEPOSIT FOR FC where $1=`cut c 4-8` and first 3 characters are 003...