usage <options>

**amnakhan786** · 12-02-2012

Hi,
i am relatively new to programming. i am trying to use an open source library found by google search. the readme file tells to write make on commandline, as a result i got an exe file sample, but now i am trying to chk the output and the usage is:

USAGE

Usage: sample <options>options:
-c : Encode input file to output file.
-d : Decode input file to output file.
-k [1-7] : Length of binary portion.
-i <filename> : Name of input file.
-o <filename> : Name of output file.
-h|? : Print out command line options.
-c Compress the specified input file (see -i) using the Lempel-Ziv-Welch encoding algorithm. Results are written to the specified output file (see -o).
-d Decompress the specified input file (see -i) using the Lempel-Ziv-Welch decoding algorithm. Results are written to the specified output file (see -o). Only files compressed by this program may be decompressed.
-k [1-7] The number of bits in the binary portion of a Rice encoded value.
-i <filename> The name of the input file. There is no valid usage of this program without a specified input file.
-o <filename> The name of the output file. If no file is specified, stdout will be used.

NOTE: Sending compressed output to stdout may produce undesirable results.

i think i sholud give the command ./sample -c -4 -input.txt -output.txt
but i am getting an error. the error gives description of usuage, which means i ma doing something wrong.
any help is appreciated.additionally, if anyone can refer me to some document describing how to give such commands i will be grateful.

**grumpy** · 12-02-2012

That command line will read input from a file named nput.txt and write to a file named utput.txt (assuming, in the processing of options, that it doesn't demand separation between -i/o and the filename).

**amnakhan786** · 12-02-2012

Originally Posted by grumpy

That command line will read input from a file named nput.txt and write to a file named utput.txt (assuming, in the processing of options, that it doesn't demand separation between -i/o and the filename).

thanks for the reply, but can u plz elaborate. i gave the command

Code:

./sample -c(compress) -4 (value of k) -1.txt(input file) -2.txt(output file)

but error message says:

Code:

Error: k must be between 1 and 7.
Usage: sample <options>

Options:
  -c : Encode input file to output file.
  -d : Decode input file to output file.
  -k [1-7]: Length of binary portion.
  -i <filename> : Name of input file.
  -o <filename> : Name of output file.
  -h | ?  : Print out command line options.

i dont understand where i am wrong. how do i give option for encode and value for k

thanks

**grumpy** · 12-02-2012

My guess would be "./sample -c -k 4 -i 1.txt -o 2.txt"

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