sys.argv[1] with wiringPI

[gproduct]

Hi!
I started using wiringPi for UART for the raspberry pi and my attiny2313.
I don't want to write ten 1 character different .c code.
I know that with python I can use sys.argv[x]. How do I do it with wiringPi (I'm new to wiringPi)
Cheers

[PeterO]

I appreciate that English is probably not your first language, but it is not clear what you are asking about.

PeterO

[joan]

Save the following as args.c and compile with gcc -o args args.c

Code: Select all

#include <stdio.h>
#include <stdlib.h>

int main(int argc, char *argv[])
{
   int i, p1, p2;

   for (i=0; i<argc; i++) printf("arg%d is %s\n", i, argv[i]);

   if (argc>1) p1 = atoi(argv[1]); else p1=-1;
   if (argc>2) p2 = atoi(argv[2]); else p2=-2;

   printf("p1=%d p2=%d\n", p1, p2);

   return 0;
}

Run with ./args 23 45 dhhd sjsj

or any old random rubbish and you should get the idea.

[PeterO]

Save the following as args.c and compile with gcc -o args args.c
.

A better answer is to learn about libpopt ! It should be one of the first libraries new C programmers are introduced to .

install libpopt-dev and read man 3 popt

PeterO

[joan]

Save the following as args.c and compile with gcc -o args args.c
.

A better answer is to learn about libpopt ! It should be one of the first libraries new C programmers are introduced to .

install libpopt-dev and read man 3 popt

PeterO

A bit late for me I'm afraid. Depends on what you are doing - for throw away programs I'd do the above. For anything more serious I use getopt. This is the first I have heard of popt, Can't keep abreast of all these new fangled libraries.

[PeterO]

getopt is older but just as good for most cases. My point is that argument parsing is something that every program should do properly , even if all it does is print something meaningful in response to "-help" or "--help".

PeterO

[gproduct]

Thanks joan!