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  1. Текст программы с комментриями
  2. #pragma endregion
  3. 		// минимизируемая функция
  4. 	private: double f(double x) {
  5. 				 return 2 * Math::Pow(x - 3, 2) + Math::Exp(Math::Pow(x, 2) / 2);
  6.  
  7. 				 //return 0.2 * x * Math::Log(x) + Math::Pow(x - 2.3, 2);
  8. 			 }
  9.  
  10. 		// вычисление производной функции
  11. 	private: double df(double x) {
  12. 				 double dx = 0.001;
  13.  
  14. 				 return (f(x + dx) - f(x - dx)) / (2 * dx);
  15. 			 }
  16.  
  17. 		// функция реализует метод наискорейшего спуска
  18. 	private: void descent(double x, double eps) {
  19. 				 int k = 0;
  20.  
  21. 				 double h = 0.7;
  22.  
  23. 				 for (; ; ) {
  24. 					 double y = df(x);
  25.  
  26. 					 double z = Math::Sqrt(Math::Pow(y, 2));
  27.  
  28. 					 if (z < eps) {
  29. 						 // добавить строку в таблицу
  30. 						 dataGridView1->Rows->Add();
  31.  
  32. 						 dataGridView1->Rows[k - 1]->Cells[0]->Value = k.ToString();
  33.  
  34. 						 // Math::Round() - округление, 2й аргумент - число знаков после запятой
  35. 						 dataGridView1->Rows[k - 1]->Cells[1]->Value = Math::Round(x, 6).ToString();
  36. 						 dataGridView1->Rows[k - 1]->Cells[2]->Value = Math::Round(f(x), 6).ToString();
  37.  
  38. 						 // записать результаты в текстовые поля
  39. 						 textBox3->Text = Math::Round(x, 6).ToString();
  40. 						 textBox4->Text = Math::Round(f(x), 6).ToString();
  41.  
  42. 						 break;
  43. 					 } else {
  44. 						 for (; ; ) {
  45. 							 double f_1 = f(x);
  46.  
  47. 							 double x_1 = x - h * y;
  48.  
  49. 							 double f_2 = f(x_1);
  50.  
  51. 							 if (f_2 < f_1) {
  52. 								 k++;
  53.  
  54. 								 x = x_1;
  55.  
  56. 								 // добавить строку в таблицу
  57. 								 dataGridView1->Rows->Add();
  58.  
  59. 								 dataGridView1->Rows[k - 1]->Cells[0]->Value = k.ToString();
  60.  
  61.  
  62. 								 dataGridView1->Rows[k - 1]->Cells[1]->Value = Math::Round(x, 6).ToString();
  63. 								 dataGridView1->Rows[k - 1]->Cells[2]->Value = Math::Round(f(x), 6).ToString();
  64.  
  65. 								 break;
  66. 							 } else {
  67. 								 h *= 0.7;
  68. 							 }
  69. 						 }
  70. 					 }
  71. 				 }
  72. 			 }
  73.  
  74. 		// рисование фукции
  75. 	private: void draw(double a, double b) {
  76. 				 // очистка поля
  77. 				 chart1->Series[0]->Points->Clear();
  78.  
  79. 				 double h = 0.001;
  80.  
  81. 				 for (double x = a; x <= b; x += h) {
  82. 					 // добавить точку на график
  83. 					 chart1->Series[0]->Points->AddXY(x, f(x));
  84. 				 }
  85. 			 }
  86.  
  87. 		// обработка события при нажатии на кнопку
  88. 	private: System::Void button1_Click(System::Object^  sender, System::EventArgs^  e) {
  89. 				 double x, eps, a, b;
  90.  
  91. 				 // обработка исключения
  92. 				 try {
  93. 					 // получения данных из полей
  94. 					 x = Convert::ToDouble(textBox1->Text);
  95. 					 eps = Convert::ToDouble(textBox2->Text);
  96.  
  97. 					 a = Convert::ToDouble(textBox5->Text);
  98. 					 b = Convert::ToDouble(textBox6->Text);
  99.  
  100. 					 if (a >= b) {
  101. 						 // сообщение об ошибке
  102. 						 MessageBox::Show("Введите корректный интервал!");
  103. 					 } else {
  104. 						 // обнулить число строк
  105. 						 dataGridView1->RowCount = 0;
  106.  
  107. 						 // вызов функции
  108. 						 descent(x, eps);
  109.  
  110. 						 // нарисовать график функции
  111. 						 draw(a, b);
  112. 					 }
  113. 				 } catch (...) {
  114. 					 // сообщение об ошибке
  115. 					 MessageBox::Show("Введите корректные данные!");
  116. 				 }
  117. 			 }
  118.  
Compilation error #stdin compilation error #stdout 0s 0KB
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Standard input is empty
compilation info 
prog.cpp:1:1: error: stray '\320' in program
 Текст программы с комментриями
 ^
prog.cpp:1:1: error: stray '\242' in program
prog.cpp:1:1: error: stray '\320' in program
prog.cpp:1:1: error: stray '\265' in program
prog.cpp:1:1: error: stray '\320' in program
prog.cpp:1:1: error: stray '\272' in program
prog.cpp:1:1: error: stray '\321' in program
prog.cpp:1:1: error: stray '\201' in program
prog.cpp:1:1: error: stray '\321' in program
prog.cpp:1:1: error: stray '\202' in program
prog.cpp:1:1: error: stray '\320' in program
prog.cpp:1:1: error: stray '\277' in program
prog.cpp:1:1: error: stray '\321' in program
prog.cpp:1:1: error: stray '\200' in program
prog.cpp:1:1: error: stray '\320' in program
prog.cpp:1:1: error: stray '\276' in program
prog.cpp:1:1: error: stray '\320' in program
prog.cpp:1:1: error: stray '\263' in program
prog.cpp:1:1: error: stray '\321' in program
prog.cpp:1:1: error: stray '\200' in program
prog.cpp:1:1: error: stray '\320' in program
prog.cpp:1:1: error: stray '\260' in program
prog.cpp:1:1: error: stray '\320' in program
prog.cpp:1:1: error: stray '\274' in program
prog.cpp:1:1: error: stray '\320' in program
prog.cpp:1:1: error: stray '\274' in program
prog.cpp:1:1: error: stray '\321' in program
prog.cpp:1:1: error: stray '\213' in program
prog.cpp:1:1: error: stray '\321' in program
prog.cpp:1:1: error: stray '\201' in program
prog.cpp:1:1: error: stray '\320' in program
prog.cpp:1:1: error: stray '\272' in program
prog.cpp:1:1: error: stray '\320' in program
prog.cpp:1:1: error: stray '\276' in program
prog.cpp:1:1: error: stray '\320' in program
prog.cpp:1:1: error: stray '\274' in program
prog.cpp:1:1: error: stray '\320' in program
prog.cpp:1:1: error: stray '\274' in program
prog.cpp:1:1: error: stray '\320' in program
prog.cpp:1:1: error: stray '\265' in program
prog.cpp:1:1: error: stray '\320' in program
prog.cpp:1:1: error: stray '\275' in program
prog.cpp:1:1: error: stray '\321' in program
prog.cpp:1:1: error: stray '\202' in program
prog.cpp:1:1: error: stray '\321' in program
prog.cpp:1:1: error: stray '\200' in program
prog.cpp:1:1: error: stray '\320' in program
prog.cpp:1:1: error: stray '\270' in program
prog.cpp:1:1: error: stray '\321' in program
prog.cpp:1:1: error: stray '\217' in program
prog.cpp:1:1: error: stray '\320' in program
prog.cpp:1:1: error: stray '\274' in program
prog.cpp:1:1: error: stray '\320' in program
prog.cpp:1:1: error: stray '\270' in program
prog.cpp:4:2: error: expected unqualified-id before 'private'
  private: double f(double x) {
  ^
prog.cpp:11:2: error: expected unqualified-id before 'private'
  private: double df(double x) {
  ^
prog.cpp:18:2: error: expected unqualified-id before 'private'
  private: void descent(double x, double eps) {
  ^
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https://ideone.com/nJJVgL
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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