Originally posted by: ShaCplex

Dear sir,

if we have a set say,

tuple AIRCRAFTS{

string aircrafts;

}

{AIRCRAFTS}aircrafts=...;

we can write ,

1. forall(a in aircrafts) 

2. sum( a in  aircrafts)  etc

But can we  have " not in" also?

say, how can I write forall(a not in aircrafts)..

Regards,

shahul

Hi,

  tuple AIRCRAFTS {
    string aircraftID;
    }
    {AIRCRAFTS} aircrafts= {<"A">};;
    {AIRCRAFTS} spareAircrafts={<"B">};;

    {AIRCRAFTS} aircrafts1=aircrafts union spareAircrafts;
    
   int nb=sum(a in aircrafts1:a not in aircrafts) 1;
   
   {AIRCRAFTS} res=aircrafts1 diff aircrafts;
   {AIRCRAFTS} res2={a | a in aircrafts1 : a not in aircrafts};
   
   execute
   {
   writeln(nb);
   writeln(res);  
   writeln(res2);
   }

gives

1
 {<"B">}
 {<"B">}

regards

Originally posted by: ShaCplex

Thank you sir.......

regards,

shahul