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Can we pass arguments to the main() function. and if...

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Question by Richa
Submitted on 3/10/2004
Related FAQ: comp.lang.c Answers (Abridged) to Frequently Asked Questions (FAQ)
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Can we pass arguments to the main() function.
and if yes,give an example and relevant logic for that.


Answer by harish
Submitted on 4/8/2004
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hi richa

yes of course you can pass arguments to main.
the first argument to main i.e argc called as the argument count is the total no: of arguments passed to main.the second argument is an array of character pointers called as argv.argc will be 1 even if u dont give any command line arguments since it is the name of the program itself.

here is a program that will display the arguments u passed to the main.

# include <stdio.h>

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

for (i = 0; i < argc; i++)
   printf ("%s\t",argv [i]);
}


first argument will print the proram name along with all the path.

rest depending on how many arguments u send will be printed.all the arguments are string.

both argc and argv are local to main.

 

Answer by l.gnanasekar
Submitted on 5/20/2005
Rating: Not yet rated Rate this answer: Vote
Hi dear,
  
My part.
You can pass arguments in main function the program like as

int main(int argc,char **argv,char **env)
{
     int i;
     for(i=0;i<10;i++)
         printf("%s\n",env[i]);
return 0;
}

if u run this program it prints the 10 environment variables.

 

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