how to parse several arguments using command line arguments

Question

i am writing a command line utility in which i want to parse several arguments: right now i am not reading data from address(so please don't get confuse by -addr); my primary objective is to design the framework so that i can parse several arguments as follows.

filename read -addr value -addr2 value2 -addrN valueN -length value -range value -length2 value2 -lengthN valueN -width value -width2 value2 -widthN valueN

the N can have a maximum value of 64 and minimum value of 1.

Please give some valuable suggestions so that i can do it. Thanks

Show us your code so far, and explain your difficulties. Otherwise, this is "send teh codez plz". — abelenky
– abelenky, Commented Apr 29, 2011 at 6:21
I think we can provide help without doing the actual parsing :) — salezica
– salezica, Commented Apr 29, 2011 at 6:23

Lord_Navro · Accepted Answer · 2011-04-29 06:31:53Z

3

consider using the Getopt library or some of its modifications, it can make yout life easier.

http://www.boost.org/doc/libs/1_41_0/doc/html/program_options.html

answered Apr 29, 2011 at 6:31

Lord_Navro

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1 Comment

Tejendra Over a year ago

can you please tell me what is the equivalent of getopt() under windows.Actually i am using VC++.

salezica · Accepted Answer · 2011-04-29 06:20:56Z

1

The typical main() prototype goes like this:

int main(int argc, char** argv) {
   // stuff
}

When your program is executed from a command-line, argc will be the total count of your arguments, plus one for the name of the program itself; and you can think of argv as an array of strings containing the arguments.

Knowing argc, parsing the argument list should be easy :)

Edit: a short example, just in case.

int main(int argc, char** argv) {
    printf("%d\n", argc);
}

Then, on your cl:

./program asd asd asd
4

argv[0] is "program", argv[1] is "asd", etc.

answered Apr 29, 2011 at 6:20

salezica

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2 Comments

Tejendra Over a year ago

@ Santiago Lezica hey hi i know about command line arguments but i am dealing with variable number of arguments, like i can provide any number of arguments at command line;this is the thing which is causing me the problem. Can any one of you provide help on variable number of arguments i know may be "getopt" can solve my problem but i dont know how to use it.

salezica Over a year ago

As long as you know the total number of arguments, you have no problem iterating through them and deciding which settings they affect. Just loop and analyze.

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