private void state9(CharChain chain)
{
char next = chain.GetNext();
if (next >= '0' && next <= '9')
{
state = 9;
int digit = ((int)next) - ((int)'0');
result = result * 10 + digit;
}
else if (next == '\n' || next == '\0')
{
state = 13;
if (isNegative)
{
result *= -1;
}
isNegative = false;
}
else
{
throw new Exception("Обнаружен символ: '" + charView(next) + "', ожидался перенос строки или конец файла.");
}
}
private void state4(CharChain chain)
{
char next = chain.GetNext();
if (next == '0')
{
state = 7;
}
else if (next >= '1' && next <= '9')
{
state = 5;
int digit = ((int)next) - ((int)'0');
secondNumber = secondNumber * 10 + digit;
}
else if (next == '-')
{
state = 6;
isNegative = true;
}
else
{
throw new Exception("Обнаружен символ: '" + charView(next) + "', ожидалась цифра.");
}
}
private void state8(CharChain chain)
{
char next = chain.GetNext();
if (next == '0')
{
state = 11;
}
else if (next >= '1' && next <= '9')
{
state = 9;
int digit = ((int)next) - ((int)'0');
result = result * 10 + digit;
}
else if (next == '-')
{
state = 10;
isNegative = true;
}
else if (next == '_')
{
state = 12;
skip = true;
}
else
{
throw new Exception("Обнаружен символ: '" + charView(next) + "', ожидалась цифра.");
}
}
private void state5(CharChain chain)
{
char next = chain.GetNext();
if (next >= '0' && next <= '9')
{
state = 5;
int digit = ((int)next) - ((int)'0');
secondNumber = secondNumber * 10 + digit;
}
else if (next == '=')
{
state = 8;
if (isNegative)
{
secondNumber *= -1;
}
isNegative = false;
}
else
{
throw new Exception("Обнаружен символ: '" + charView(next) + "', ожидалось '='.");
}
}
private void state1(CharChain chain)
{
char next = chain.GetNext();
if (next >= '0' && next <= '9')
{
state = 1;
int digit = ((int)next) - ((int)'0');
firstNumber = firstNumber * 10 + digit;
}
else if (isOperation(next))
{
state = 4;
operation = next;
if (isNegative)
{
firstNumber *= -1;
}
isNegative = false;
}
else
{
throw new Exception("Обнаружен символ: '" + charView(next) + "', ожидалась операция.");
}
}
private void state12(CharChain chain)
{
char next = chain.GetNext();
if (next == '\n' || next == '\0')
{
state = 13;
}
else
{
throw new Exception("Обнаружен символ : '" + charView(next) + "', ожидался перенос строки или конец файла.");
}
}
private void state7(CharChain chain)
{
char next = chain.GetNext();
if (next == '=')
{
state = 8;
}
else
{
throw new Exception("Обнаружен символ: '" + charView(next) + "', ожидался '='.");
}
}
private void state3(CharChain chain)
{
char next = chain.GetNext();
if (isOperation(next))
{
state = 4;
operation = next;
}
else
{
throw new Exception("Обнаружен символ: '" + charView(next) + "', ожидался знак операции.");
}
}
private void state10(CharChain chain)
{
char next = chain.GetNext();
if (next >= '1' && next <= '9')
{
state = 9;
int digit = ((int)next) - ((int)'0');
result = result * 10 + digit;
}
else
{
throw new Exception("Обнаружен символ: '" + charView(next) + "', ожидалась цифра.");
}
}
private void toolStripButton1_Click(object sender, EventArgs e)
{
parsedText = CodeField.Text;
CharChain chain = new CharChain(CodeField.Text);
Parser parser = new Parser();
ResultField.Text = "";
int count = 0;
while (chain.Next().Char != '\0')
{
parser.Parse(chain);
var errors = parser.GetErrors();
foreach (var error in errors)
{
count++;
ResultField.Text += error.Message;
if (error.IncorrStr != null)
{
ResultField.Text += " (Отброшенный фрагмент: '" + error.IncorrStr + "' на позиции: " + error.Idx + ")";
}
ResultField.Text += "\r\n";
CodeField.Select(error.Idx, 1);
CodeField.SelectionBackColor = Color.Red;
CodeField.DeselectAll();
}
}
if (count == 0)
{
ResultField.Text += "Ошибок нет.\r\n";
}
else
{
ResultField.Text += "Обнаружено " + count + " ошибок.\r\n";
}
}
private void toolStripButton1_Click(object sender, EventArgs e)
{
CharChain chain = new CharChain(CodeField.Text);
Automat automat = new Automat();
bool result = false;
int correct = 0;
int wrong = 0;
for (int i = 1; i <= 5; i++)
{
try
{
result = automat.Check(chain);
}
catch (Exception ex)
{
ResultField.Text += "\r\nПример №" + i.ToString() + " " + ex.Message;
return;
}
if (result)
{
correct++;
}
else
{
wrong++;
}
}
char next = chain.GetNext();
if (next != '\0')
{
ResultField.Text += "\r\nВведено больше 5 примеров.";
return;
}
ResultField.Text += "\r\nВерно: " + correct.ToString() + ", неверно: " + wrong.ToString();
}
public bool Check(CharChain chain)
{
state = 0;
firstNumber = 0;
secondNumber = 0;
result = 0;
isNegative = false;
skip = false;
operation = '\0';
while (state != 13)
{
switch (state)
{
case 0:
state0(chain);
break;
case 1:
state1(chain);
break;
case 2:
state2(chain);
break;
case 3:
state3(chain);
break;
case 4:
state4(chain);
break;
case 5:
state5(chain);
break;
case 6:
state6(chain);
break;
case 7:
state7(chain);
break;
case 8:
state8(chain);
break;
case 9:
state9(chain);
break;
case 10:
state10(chain);
break;
case 11:
state11(chain);
break;
case 12:
state12(chain);
break;
}
}
return(isCorrect());
}
public bool Parse(CharChain c)
{
chain = c;
state = 1;
id = "";
errors = new List <ParseError>();
chain.SkipSpaces();
while (state != 13)
{
switch (state)
{
case 1:
state1();
break;
case 2:
state2();
break;
case 3:
state3();
break;
case 4:
state4();
break;
case 5:
state5();
break;
case 6:
state6();
break;
case 7:
state7();
break;
case 8:
state8();
break;
case 9:
state9();
break;
case 10:
state10();
break;
case 11:
state11();
break;
case 12:
state12();
break;
}
}
return(true);
}
