private Expression readExpression()
{
Console.WriteLine(" 1: Const Expression\n 2: Var Expression\n 3: Arith Expression");
int c = Convert.ToInt32(Console.ReadLine());
if (c == 1)
{
Console.WriteLine("Input constant expression");
ConstExpression cx = new ConstExpression(Convert.ToInt32(Console.ReadLine()));
return((Expression)cx);
}
else if (c == 2)
{
Console.WriteLine("Input variable expression");
VarExpression ve = new VarExpression(Console.ReadLine());
return((Expression)ve);
}
else if (c == 3)
{
ArithExpression ae = new ArithExpression();
Console.WriteLine("Input left expression");
ae.setL(readExpression());
Console.WriteLine("Input operator");
ae.setOp(Console.ReadLine()[0]);
Console.WriteLine("Input right expression");
ae.setR(readExpression());
return((Expression)ae);
}
return(null);
}
public Iter(ArithExpression arith_begin, ArithExpression arith_end)
{
if (arith_begin == null || arith_end == null)
{
throw new Exception("Null ArithExpression inputted into new Iter");
}
this.arith_begin = arith_begin;
this.arith_end = arith_end;
}
public BoolExpression(BoolOperator op, ArithExpression arith1, ArithExpression arith2)
{
//Postcondition: Creates a new BoolExpression using op, arith1, and arith2
if (arith1 == null || arith2 == null)
{
throw new Exception("Null ArithExpression inputted into new BoolExpression");
}
this.arith1 = arith1;
this.arith2 = arith2;
this.op = op;
}
void ButtonSubmitArithmeticClick(object sender, EventArgs e)
{
String operand = textBoxArithmeticOperand.Text;
ArithExpression ae = new ArithExpression();
ae.setL(leftExpression);
ae.setOp(operand[0]);
ae.setR(rightExpression);
expression = ae;
finished();
}
public PrintStatement(ArithExpression arith)
{
this.arith = arith ?? throw new Exception("Null ArithExpression inputted to new PrintStatement");
}
public AssignStatement(Id id, ArithExpression arith)
{
this.id = id ?? throw new Exception("Null Id inputted into new AssignStatement");
this.arith = arith ?? throw new Exception("Null ArithExpression inputted into new AssignStatement");
}
