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In article <secOX9200WB2EMBEpC@andrew.cmu.edu> jh6l+@andrew.cmu.edu (Joseph A. Hollowood) writes:
>How can I make the following work?
>
>The user types in a month (int) and a year (int) and I
>pass those values to system("cal [month] [year]").
>
>Here's the code I was experimenting with, but it wasn't
>working...
>
>   int theMonth = [inputFields intValueAt:0];
>   int theYear = [inputFields intValueAt:1]; 
>   system("cal $theMonth $theYear > /tmp/calOutputFile"); 
>

No, the $variable thing only works in shell files, if that is what you
are suggesting.  You need to create a string that has what you want to
pass to the system call.  Use sprintf.  For your example:


   int theMonth = [inputFields intValueAt:0];
   int theYear = [inputFields intValueAt:1]; 
char string[1024];
   sprintf(string,"cal %d %d > /tmp/calOutputFile",theMonth,theYear);
   system(string);

string will contain what you want -- ie the values of the two variables.
sprintf works just like printf, except the output goes to a string.

-nick
kline@cs.arizona.edu