private Statement readAS()
{
AssignStatement _as = new AssignStatement();
Console.WriteLine("Input variable name:");
_as.setVar(Console.ReadLine());
Console.WriteLine("Input variable value:");
_as.setE(readExpression());
return(_as);
}
void ButtonOKClick(object sender, EventArgs e)
{
String variable = textBoxVariable.Text;
AssignStatement asstm = new AssignStatement();
asstm.setVar(variable);
asstm.setE(this.expression);
stmt = asstm;
finished();
}