write a script & sum contents!PLEASE HELP


 
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Old 05-24-2007
Quote:
Originally Posted by questionmaker25
Ofcourse it is a homework!!!!
Is that so bad to ask for directions?
Yes, asking for help with homework questions is a no-no as per the forum rules.

Quote:
Originally Posted by questionmaker25
I don't want you to solve the exercise!
I just want you to tell my how to add the numbers of the third column
If I tell you how to add numbers of the third column, isn't that the same as solving your exercise?

I will give you a couple of hints: read in the file line by line, get the third column using 'cut', use shell builtin addition (check the man page of your shell) to add the number of the third column.

And I am locking this thread. No more homework posts please.
 
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sum(1)								   User Commands							    sum(1)

NAME
sum - print checksum and block count for a file SYNOPSIS
sum [-r] [file]... DESCRIPTION
The sum utility calculates and prints a 16-bit checksum for the named file and the number of 512-byte blocks in the file. It is typically used to look for bad spots, or to validate a file communicated over some transmission line. OPTIONS
The following options are supported: -r Use an alternate (machine-dependent) algorithm in computing the checksum. OPERANDS
The following operands are supported: file A path name of a file. If no files are named, the standard input is used. USAGE
See largefile(5) for the description of the behavior of sum when encountering files greater than or equal to 2 Gbyte ( 2^31 bytes). ENVIRONMENT VARIABLES
See environ(5) for descriptions of the following environment variables that affect the execution of sum: LC_CTYPE, LC_MESSAGES, and NLSPATH. EXIT STATUS
The following exit values are returned. 0 Successful completion. >0 An error occurred. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------------------------------------+ | ATTRIBUTE TYPE ATTRIBUTE VALUE | |Availability SUNWesu | |CSI Enabled | +-----------------------------------------------------------+ SEE ALSO
cksum(1), sum(1B), wc(1), attributes(5), environ(5), largefile(5) DIAGNOSTICS
Read error is indistinguishable from end of file on most devices. Check the block count. NOTES
Portable applications should use cksum(1). sum and usr/ucb/sum (see sum(1B)) return different checksums. SunOS 5.11 7 Nov 1995 sum(1)