Parsing user entered commands

Hi,
I am writing a program that takes an user input and sends it to execvp to execute. Right now I am stuck on parsing the user inputs. I think its a problem with my delimiter. if I use a different delimiter such as a comma it works fine, but I need to use a space. Take a look at tell me whats going on. Thanks.

Once I parse them how can I use each token separately? can I say pnt[0], pnt[1]? THanks
#include <stdio.h>
 
int main(int argc, char *argv[])
{
char comm[100];
char *pnt;
int i=0;
char delims[]= " ";
 
if (argc==1 ||  argc >2){
printf("Incorrect number of arguments. Exiting\n");
exit(0);
}
printf("%s ", argv[1]);
scanf("%s",&comm);
 
pnt = strtok (comm,delims);
 
while (pnt != NULL){
printf("%s\n",pnt);
pnt=strtok(NULL,delims);
}
}

Open in new window

wannabe_cpgeekAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

mrjoltcolaCommented:
scanf() is only going to scan up until the first space, so  you really should use gets() to get the full line before trying to parse it.


Assuming:

red green blue


scanf("%s", ..) will scan "red" and leave the rest in the buffer (so you could call scanf again and get the next)

gets() will scan "red green blue", then you can use strtok() to parse
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
wannabe_cpgeekAuthor Commented:
Thanks. I figured it out.
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
System Programming

From novice to tech pro — start learning today.