public PrgState Execute(PrgState state)
{
MyIDictionary <String, int> symTable = state.GetSymTable();
int file_id = this.exp_file_id.Eval(symTable);
MyIPair <String, StreamReader> fileTable = state.GetFileTable().Lookup(file_id);
if (fileTable == null)
{
throw new MyException("File not opened");
}
int anotherVal;
String line = fileTable.GetSecond().ReadLine();
if (line == null)
{
anotherVal = 0;
}
else
{
anotherVal = System.Convert.ToInt32(line);
}
if (symTable.IsDefinedU(var_name))
{
symTable.Update(var_name, anotherVal);
}
else
{
symTable.Add(var_name, anotherVal);
}
return(state);
}
public PrgState Execute(PrgState state)
{
MyIStack <IStmt> stk = state.GetExeStack();
MyIDictionary <String, int> symTbl = state.GetSymTable();
int val = exp.Eval(symTbl);
if (symTbl.IsDefinedU(id))
{
symTbl.Update(id, val);
}
else
{
symTbl.Add(id, val);
}
return(state);
}