Re: How to call another separate program and passing some variables in C?

[Per Jessen <per@computer.org>]

johnny_xing wrote:
> Hi,
> 
> I tried as what Hlalesh said and it doesn’t work.
> 
> Here is what I have:
> 
> In program 1:
> 
> system(“/usr/local/src/program2 1”);
> 
> In program 2:
> int main(int argc, char *argv[])
> {
> int input1;
> char buffer[10];
> sprintf(buffer, argv[0]);
> 
> printf("buffer is %s\n", buffer);
> input1 =atoi(buffer);
> printf("input1 value is %d\n",input1);
> }
> 
> The output is:
> 
> buffer is /usr/local/src/parallel/asterisk
> input1 value is 0
> 

argv[0] is always the name of the called binary.  To get the arguments, 
you need to start with argv[1].

Surely you can see that atoi("/usr/local/src/parallel/asterisk") is 0 as 
there is no way to convert "/usr/local/src/parallel/asterisk" to an integer.


/Per Jessen, Zurich
	

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