public override int Eval(MyIDictionary tbl, MyIHeap heap)
{
int heapAddr = tbl.Lookup(mVarName);
try
{
heap.ContainsKey(heapAddr);
}
catch (ArgumentNullException npe)
{
throw new MyNullPointerException("Heap memory location unallocated");
}
return(heap.Get(heapAddr));
}
public PrgState <T> Execute <T>(PrgState <T> state)
{
MyIHeap heap = state.GetHeap();
MyIDictionary symTable = state.GetSymTable();
if (symTable.IsDefined(mVarName))
{
heap.Update(symTable.Lookup(mVarName), mExp.Eval(symTable, heap));;
}
else
{
throw new ArgumentException("Heap address undefined");
}
return(null);
}
public void show()
{
while (true)
{
PrintMenu();
Console.Write("Input the option: ");
String key = Console.ReadLine();
Command com = commands.Lookup(key);
if (com == null)
{
Console.WriteLine("Invalid Option");
continue;
}
com.Execute();
}
}
public override int Eval(MyIDictionary <String, int> tbl)
{
return(tbl.Lookup(this.id));
}