public override int eval(MyIDictionary <string, int> tbl)
{
//if (!tbl.isDefined(id))
// throw new MyStmtExecException("The id is not in the table: Exception thrown from VarExp");
int val = 0;
ICollection <string> keys = tbl.keys();
for (int i = 0; i < keys.Count(); i++)
{
if (keys.ElementAt(i) == this.id)
{
val = tbl.get(i);
break;
}
}
return(val);
}
