Работа с textBox

C++ / CLI Windows Forms
26.06.2017

(Всего голосов: 0)

Рассмотрим все поэтапно.
Для начала нужно добавить в форму кнопки Button, один label и три textBox.
В свойствах каждой кнопки меняем названия на 1, 2, ..., 9, "+", "-" и т.д.
Двойным щелчком по любой из кнопок переходим к коду.
1. Вывести в textBox цифру по нажатию на Button.
     В код кнопки Button1 добавляем:
     
textBox1->Text += "1";    //Теперь по нажатию на Button1 в textBox добавляется 1.​

     Остальные кнопки с цифрами делаем аналогично.    
2. Знаки будем выводить в label1.
     В код кнопки Button11 добавляем:
     
label1->Text = "+";    //Т.е. по нажатию на Button11 меняем знак в label1 на "+"​

     Аналогично добавляем остальные знаки.
3. Если заполнены textBox1 и label1, пора заполнять textBox2. Для этого можно использовать условие if.
     Т.е. в коде каждого из textBox надо написать, к примеру:
     
if(label1->Text == "") textBox1->Text += "1";
     else textBox2->Text += "1";  ​

     Так мы попадем в textBox2. В свойствах название label1 нужно стереть и нажать на Enter! А то не сработает.
4. Вычисляем значение и записываем его в textBox3.
     В коде кнопки "=" напишем:
                   
double b;
                   switch(label1->Text[0])
     {
     case '+':
      b = Convert::ToDouble(textBox1->Text) + Convert::ToDouble(textBox2->Text);
      break;
     case '-':
      b = Convert::ToDouble(textBox1->Text) - Convert::ToDouble(textBox2->Text);
      break;
     case '*':
      b = Convert::ToDouble(textBox1->Text) * Convert::ToDouble(textBox2->Text);
      break;
     case '/':
      b = Convert::ToDouble(textBox1->Text) / Convert::ToDouble(textBox2->Text);
      break;
     }      
                     textBox3->Text = Convert::ToString(b); //вывод результата в textBox3
      Т.е. производим вычисления с числами, находящимися в textBox1 и textBox2, со знаком, взятым из label1.
      Convert используется для перевода строки из одного типа в другой.
5. Запись дробного числа.
      Поставить запятую труда не составит:
      textBox1->Text += ","; 
      Фишка в том, что надо ограничить пользователя в постановке запятых.
     
if(!textBox1->Text->Contains(",")) textBox1->Text += ","; 
//Contains проверит, нет ли в строке запятых
Мы рассмотрели основные моменты для написания калькулятора. На этой основе Вы можете сами написать калькулятор своей мечты ;)
 
Вот код готового калькулятора, включаещего в себя дополнительные функции, а так же вычисление числовыми цепями. 
Для запуска вставьте этот код и вместо Project1 напишите название своего проекта!!!
#pragma once

namespace Project1 {
	double a, b, save; //по нажатию на MS число из textBox1 сохраняется в save
	bool con = true; //после нажатия "=" con меняется на false и по нажатию на цифру происходит очистка и ввод новых данных в textBox1
	using namespace System;
	using namespace System::ComponentModel;
	using namespace System::Collections;
	using namespace System::Windows::Forms;
	using namespace System::Data;
	using namespace System::Drawing;

	/// 
	/// Сводка для MyForm
	/// 
	public ref class MyForm : public System::Windows::Forms::Form
	{
	public:
		MyForm(void)
		{
			InitializeComponent();
			//
			//TODO: добавьте код конструктора
			//
		}

	protected:
		/// 
		/// Освободить все используемые ресурсы.
		/// 
		~MyForm()
		{
			if (components)
			{
				delete components;
			}
		}
	private: System::Windows::Forms::Button^  button1;
	protected: 
	private: System::Windows::Forms::Button^  button2;
	private: System::Windows::Forms::Button^  button3;
	private: System::Windows::Forms::Button^  button4;
	private: System::Windows::Forms::Button^  button5;
	private: System::Windows::Forms::Button^  button6;
	private: System::Windows::Forms::Button^  button7;
	private: System::Windows::Forms::Button^  button8;
	private: System::Windows::Forms::Button^  button9;
	private: System::Windows::Forms::TextBox^  textBox1;
	private: System::Windows::Forms::Button^  button10;
	private: System::Windows::Forms::Button^  button11;
	private: System::Windows::Forms::Button^  button12;
	private: System::Windows::Forms::Button^  button13;
	private: System::Windows::Forms::Button^  button14;
	private: System::Windows::Forms::Button^  button15;
	private: System::Windows::Forms::Button^  button16;
	private: System::Windows::Forms::Button^  button17;
	private: System::Windows::Forms::Button^  button18;
	private: System::Windows::Forms::Button^  button19;
	private: System::Windows::Forms::Button^  button20;


	private: System::Windows::Forms::Label^  label1;
	private: System::Windows::Forms::Button^  button21;
	private: System::Windows::Forms::Button^  button22;
	private: System::Windows::Forms::Label^  label2;

	private:
		/// 
		/// Требуется переменная конструктора.
		/// 
		System::ComponentModel::Container ^components;

#pragma region Windows Form Designer generated code
		/// 
		/// Обязательный метод для поддержки конструктора - не изменяйте
		/// содержимое данного метода при помощи редактора кода.
		/// 
		void InitializeComponent(void)
		{
			this->button1 = (gcnew System::Windows::Forms::Button());
			this->button2 = (gcnew System::Windows::Forms::Button());
			this->button3 = (gcnew System::Windows::Forms::Button());
			this->button4 = (gcnew System::Windows::Forms::Button());
			this->button5 = (gcnew System::Windows::Forms::Button());
			this->button6 = (gcnew System::Windows::Forms::Button());
			this->button7 = (gcnew System::Windows::Forms::Button());
			this->button8 = (gcnew System::Windows::Forms::Button());
			this->button9 = (gcnew System::Windows::Forms::Button());
			this->textBox1 = (gcnew System::Windows::Forms::TextBox());
			this->button10 = (gcnew System::Windows::Forms::Button());
			this->button11 = (gcnew System::Windows::Forms::Button());
			this->button12 = (gcnew System::Windows::Forms::Button());
			this->button13 = (gcnew System::Windows::Forms::Button());
			this->button14 = (gcnew System::Windows::Forms::Button());
			this->button15 = (gcnew System::Windows::Forms::Button());
			this->button16 = (gcnew System::Windows::Forms::Button());
			this->button17 = (gcnew System::Windows::Forms::Button());
			this->button18 = (gcnew System::Windows::Forms::Button());
			this->button19 = (gcnew System::Windows::Forms::Button());
			this->button20 = (gcnew System::Windows::Forms::Button());
			this->label1 = (gcnew System::Windows::Forms::Label());
			this->button21 = (gcnew System::Windows::Forms::Button());
			this->button22 = (gcnew System::Windows::Forms::Button());
			this->label2 = (gcnew System::Windows::Forms::Label());
			this->SuspendLayout();
			// 
			// button1
			// 
			this->button1->Location = System::Drawing::Point(12, 66);
			this->button1->Name = L"button1";
			this->button1->Size = System::Drawing::Size(75, 23);
			this->button1->TabIndex = 0;
			this->button1->Text = L"1";
			this->button1->UseVisualStyleBackColor = true;
			this->button1->Click += gcnew System::EventHandler(this, &MyForm::button1_Click);
			// 
			// button2
			// 
			this->button2->Location = System::Drawing::Point(93, 66);
			this->button2->Name = L"button2";
			this->button2->Size = System::Drawing::Size(75, 23);
			this->button2->TabIndex = 1;
			this->button2->Text = L"2";
			this->button2->UseVisualStyleBackColor = true;
			this->button2->Click += gcnew System::EventHandler(this, &MyForm::button2_Click);
			// 
			// button3
			// 
			this->button3->Location = System::Drawing::Point(174, 38);
			this->button3->Name = L"button3";
			this->button3->Size = System::Drawing::Size(75, 23);
			this->button3->TabIndex = 2;
			this->button3->Text = L"3";
			this->button3->UseVisualStyleBackColor = true;
			this->button3->Click += gcnew System::EventHandler(this, &MyForm::button3_Click);
			// 
			// button4
			// 
			this->button4->Location = System::Drawing::Point(12, 95);
			this->button4->Name = L"button4";
			this->button4->Size = System::Drawing::Size(75, 23);
			this->button4->TabIndex = 3;
			this->button4->Text = L"4";
			this->button4->UseVisualStyleBackColor = true;
			this->button4->Click += gcnew System::EventHandler(this, &MyForm::button4_Click);
			// 
			// button5
			// 
			this->button5->Location = System::Drawing::Point(94, 95);
			this->button5->Name = L"button5";
			this->button5->Size = System::Drawing::Size(75, 23);
			this->button5->TabIndex = 4;
			this->button5->Text = L"5";
			this->button5->UseVisualStyleBackColor = true;
			this->button5->Click += gcnew System::EventHandler(this, &MyForm::button5_Click);
			// 
			// button6
			// 
			this->button6->Location = System::Drawing::Point(174, 67);
			this->button6->Name = L"button6";
			this->button6->Size = System::Drawing::Size(75, 23);
			this->button6->TabIndex = 5;
			this->button6->Text = L"6";
			this->button6->UseVisualStyleBackColor = true;
			this->button6->Click += gcnew System::EventHandler(this, &MyForm::button6_Click);
			// 
			// button7
			// 
			this->button7->Location = System::Drawing::Point(12, 125);
			this->button7->Name = L"button7";
			this->button7->Size = System::Drawing::Size(75, 23);
			this->button7->TabIndex = 6;
			this->button7->Text = L"7";
			this->button7->UseVisualStyleBackColor = true;
			this->button7->Click += gcnew System::EventHandler(this, &MyForm::button7_Click);
			// 
			// button8
			// 
			this->button8->Location = System::Drawing::Point(94, 125);
			this->button8->Name = L"button8";
			this->button8->Size = System::Drawing::Size(75, 23);
			this->button8->TabIndex = 7;
			this->button8->Text = L"8";
			this->button8->UseVisualStyleBackColor = true;
			this->button8->Click += gcnew System::EventHandler(this, &MyForm::button8_Click);
			// 
			// button9
			// 
			this->button9->Location = System::Drawing::Point(175, 96);
			this->button9->Name = L"button9";
			this->button9->Size = System::Drawing::Size(75, 23);
			this->button9->TabIndex = 8;
			this->button9->Text = L"9";
			this->button9->UseVisualStyleBackColor = true;
			this->button9->Click += gcnew System::EventHandler(this, &MyForm::button9_Click);
			// 
			// textBox1
			// 
			this->textBox1->Location = System::Drawing::Point(12, 12);
			this->textBox1->Name = L"textBox1";
			this->textBox1->Size = System::Drawing::Size(314, 20);
			this->textBox1->TabIndex = 9;
			// 
			// button10
			// 
			this->button10->Location = System::Drawing::Point(256, 38);
			this->button10->Name = L"button10";
			this->button10->Size = System::Drawing::Size(75, 23);
			this->button10->TabIndex = 10;
			this->button10->Text = L"+";
			this->button10->UseVisualStyleBackColor = true;
			this->button10->Click += gcnew System::EventHandler(this, &MyForm::button10_Click);
			// 
			// button11
			// 
			this->button11->Location = System::Drawing::Point(256, 67);
			this->button11->Name = L"button11";
			this->button11->Size = System::Drawing::Size(75, 23);
			this->button11->TabIndex = 11;
			this->button11->Text = L"-";
			this->button11->UseVisualStyleBackColor = true;
			this->button11->Click += gcnew System::EventHandler(this, &MyForm::button11_Click);
			// 
			// button12
			// 
			this->button12->Location = System::Drawing::Point(256, 96);
			this->button12->Name = L"button12";
			this->button12->Size = System::Drawing::Size(75, 23);
			this->button12->TabIndex = 12;
			this->button12->Text = L"*";
			this->button12->UseVisualStyleBackColor = true;
			this->button12->Click += gcnew System::EventHandler(this, &MyForm::button12_Click);
			// 
			// button13
			// 
			this->button13->Location = System::Drawing::Point(93, 37);
			this->button13->Name = L"button13";
			this->button13->Size = System::Drawing::Size(75, 23);
			this->button13->TabIndex = 13;
			this->button13->Text = L"0";
			this->button13->UseVisualStyleBackColor = true;
			this->button13->Click += gcnew System::EventHandler(this, &MyForm::button13_Click);
			// 
			// button14
			// 
			this->button14->Location = System::Drawing::Point(12, 38);
			this->button14->Name = L"button14";
			this->button14->Size = System::Drawing::Size(38, 23);
			this->button14->TabIndex = 14;
			this->button14->Text = L".";
			this->button14->UseVisualStyleBackColor = true;
			this->button14->Click += gcnew System::EventHandler(this, &MyForm::button14_Click);
			// 
			// button15
			// 
			this->button15->Location = System::Drawing::Point(174, 125);
			this->button15->Name = L"button15";
			this->button15->Size = System::Drawing::Size(75, 23);
			this->button15->TabIndex = 15;
			this->button15->Text = L"C";
			this->button15->UseVisualStyleBackColor = true;
			this->button15->Click += gcnew System::EventHandler(this, &MyForm::button15_Click);
			// 
			// button16
			// 
			this->button16->Location = System::Drawing::Point(255, 125);
			this->button16->Name = L"button16";
			this->button16->Size = System::Drawing::Size(75, 23);
			this->button16->TabIndex = 16;
			this->button16->Text = L"/";
			this->button16->UseVisualStyleBackColor = true;
			this->button16->Click += gcnew System::EventHandler(this, &MyForm::button16_Click);
			// 
			// button17
			// 
			this->button17->Location = System::Drawing::Point(255, 155);
			this->button17->Name = L"button17";
			this->button17->Size = System::Drawing::Size(75, 23);
			this->button17->TabIndex = 17;
			this->button17->Text = L"=";
			this->button17->UseVisualStyleBackColor = true;
			this->button17->Click += gcnew System::EventHandler(this, &MyForm::button17_Click);
			// 
			// button18
			// 
			this->button18->Location = System::Drawing::Point(12, 154);
			this->button18->Name = L"button18";
			this->button18->Size = System::Drawing::Size(61, 23);
			this->button18->TabIndex = 18;
			this->button18->Text = L"MS";
			this->button18->UseVisualStyleBackColor = true;
			this->button18->Click += gcnew System::EventHandler(this, &MyForm::button18_Click);
			// 
			// button19
			// 
			this->button19->Location = System::Drawing::Point(79, 154);
			this->button19->Name = L"button19";
			this->button19->Size = System::Drawing::Size(59, 23);
			this->button19->TabIndex = 19;
			this->button19->Text = L"MR";
			this->button19->UseVisualStyleBackColor = true;
			this->button19->Click += gcnew System::EventHandler(this, &MyForm::button19_Click);
			// 
			// button20
			// 
			this->button20->Location = System::Drawing::Point(144, 155);
			this->button20->Name = L"button20";
			this->button20->Size = System::Drawing::Size(53, 23);
			this->button20->TabIndex = 20;
			this->button20->Text = L"MC";
			this->button20->UseVisualStyleBackColor = true;
			this->button20->Click += gcnew System::EventHandler(this, &MyForm::button20_Click);
			// 
			// label1
			// 
			this->label1->AutoSize = true;
			this->label1->Location = System::Drawing::Point(306, 15);
			this->label1->Name = L"label1";
			this->label1->Size = System::Drawing::Size(0, 13);
			this->label1->TabIndex = 23;
			// 
			// button21
			// 
			this->button21->Location = System::Drawing::Point(49, 38);
			this->button21->Name = L"button21";
			this->button21->Size = System::Drawing::Size(38, 23);
			this->button21->TabIndex = 24;
			this->button21->Text = L"-";
			this->button21->UseVisualStyleBackColor = true;
			this->button21->Click += gcnew System::EventHandler(this, &MyForm::button21_Click);
			// 
			// button22
			// 
			this->button22->Location = System::Drawing::Point(203, 155);
			this->button22->Name = L"button22";
			this->button22->Size = System::Drawing::Size(46, 23);
			this->button22->TabIndex = 25;
			this->button22->Text = L"CE";
			this->button22->UseVisualStyleBackColor = true;
			this->button22->Click += gcnew System::EventHandler(this, &MyForm::button22_Click);
			// 
			// label2
			// 
			this->label2->AutoSize = true;
			this->label2->Location = System::Drawing::Point(270, 15);
			this->label2->Name = L"label2";
			this->label2->Size = System::Drawing::Size(0, 13);
			this->label2->TabIndex = 26;
			// 
			// MyForm
			// 
			this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
			this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
			this->ClientSize = System::Drawing::Size(338, 183);
			this->Controls->Add(this->label2);
			this->Controls->Add(this->button22);
			this->Controls->Add(this->button21);
			this->Controls->Add(this->label1);
			this->Controls->Add(this->button20);
			this->Controls->Add(this->button19);
			this->Controls->Add(this->button18);
			this->Controls->Add(this->button17);
			this->Controls->Add(this->button16);
			this->Controls->Add(this->button15);
			this->Controls->Add(this->button14);
			this->Controls->Add(this->button13);
			this->Controls->Add(this->button12);
			this->Controls->Add(this->button11);
			this->Controls->Add(this->button10);
			this->Controls->Add(this->textBox1);
			this->Controls->Add(this->button9);
			this->Controls->Add(this->button8);
			this->Controls->Add(this->button7);
			this->Controls->Add(this->button6);
			this->Controls->Add(this->button5);
			this->Controls->Add(this->button4);
			this->Controls->Add(this->button3);
			this->Controls->Add(this->button2);
			this->Controls->Add(this->button1);
			this->Name = L"MyForm";
			this->Text = L"MyForm";
			this->Load += gcnew System::EventHandler(this, &MyForm::MyForm_Load);
			this->ResumeLayout(false);
			this->PerformLayout();

		}
#pragma endregion
	private: System::Void MyForm_Load(System::Object^  sender, System::EventArgs^  e) {
			 }
	private: System::Void button1_Click(System::Object^  sender, System::EventArgs^  e) {
				 if(con == false) textBox1->Text = "";
				 con = true;
if(textBox1->Text == "Невозможно делить на ноль")textBox1->Text = "";
textBox1->Text += "1"; //вывод цифры 
			 }
private: System::Void button2_Click(System::Object^  sender, System::EventArgs^  e) {
			 if(con == false) textBox1->Text = "";
				 con = true;
if(textBox1->Text == "Невозможно делить на ноль")textBox1->Text = "";
textBox1->Text += "2";
		 }
private: System::Void button3_Click(System::Object^  sender, System::EventArgs^  e) {
			 if(con == false) textBox1->Text = "";
				 con = true;
			 if(textBox1->Text == "Невозможно делить на ноль")textBox1->Text = "";
textBox1->Text += "3";
		 }
private: System::Void button4_Click(System::Object^  sender, System::EventArgs^  e) {
			 if(con == false) textBox1->Text = "";
				 con = true;
textBox1->Text += "4";
		 }
private: System::Void button5_Click(System::Object^  sender, System::EventArgs^  e) {
			 if(con == false) textBox1->Text = "";
				 con = true;
			 if(textBox1->Text == "Невозможно делить на ноль")textBox1->Text = "";
textBox1->Text += "5";
		 }
private: System::Void button6_Click(System::Object^  sender, System::EventArgs^  e) {
			 if(con == false) textBox1->Text = "";
				 con = true;
			 if(textBox1->Text == "Невозможно делить на ноль")textBox1->Text = "";
textBox1->Text += "6";
		 }
private: System::Void button7_Click(System::Object^  sender, System::EventArgs^  e) {
			 if(con == false) textBox1->Text = "";
				 con = true;
			 if(textBox1->Text == "Невозможно делить на ноль")textBox1->Text = "";
textBox1->Text += "7";
		 }
private: System::Void button8_Click(System::Object^  sender, System::EventArgs^  e) {
			 if(con == false) textBox1->Text = "";
				 con = true;
			 if(textBox1->Text == "Невозможно делить на ноль")textBox1->Text = "";
textBox1->Text += "8";
				 }
private: System::Void button9_Click(System::Object^  sender, System::EventArgs^  e) {
			 if(con == false) textBox1->Text = "";
				 con = true;
			 if(textBox1->Text == "Невозможно делить на ноль")textBox1->Text = "";
textBox1->Text += "9";
		 }
private: System::Void button13_Click(System::Object^  sender, System::EventArgs^  e) {
			 if(con == false) textBox1->Text = "";
				 con = true;
			 if(textBox1->Text == "Невозможно делить на ноль")textBox1->Text = "";
if(textBox1->Text != "0")textBox1->Text += "0";
		 }
private: System::Void button10_Click(System::Object^  sender, System::EventArgs^  e) { //+
			 if(textBox1->Text == "0" && label1->Text == "/"){ textBox1->Text = "Невозможно делить на ноль"; label1->Text = "";}
			 else{
			 if(label1->Text != ""){	//если label1 содержит знак, то производим вычисления 		  
				             switch(label1->Text[0])
		   {
		   case '+':
			   b =  a + Convert::ToDouble(textBox1->Text);
			   break;
           case '-':
			   b = a - Convert::ToDouble(textBox1->Text);
			   break;
		   case '*':
			   b = a * Convert::ToDouble(textBox1->Text);
			   break;
		   case '/':
			   b =  a / Convert::ToDouble(textBox1->Text);
			   break;

		   } 
                        label2->Text = Convert::ToString(b);
						a = b;
							 label1->Text = "+"; textBox1->Text = "";
			 } else {
			   a = Convert::ToDouble(textBox1->Text);
			   label1->Text = "+";
			   textBox1->Text = "";
			
							 }	
			 }
         }
private: System::Void button17_Click(System::Object^  sender, System::EventArgs^  e) { //=
			 if(textBox1->Text == "0" && label1->Text == "/"){ textBox1->Text = "Невозможно делить на ноль"; label1->Text = "";}
			 else{
			 				             switch(label1->Text[0])
		   {
		   case '+':
			   b =  a + Convert::ToDouble(textBox1->Text);
			   break;
           case '-':
			   b = a - Convert::ToDouble(textBox1->Text);
			   break;
		   case '*':
			   b = a * Convert::ToDouble(textBox1->Text);
			   break;
		   case '/':
			   b =  a / Convert::ToDouble(textBox1->Text);
			   break;

		   } 
                        textBox1->Text = Convert::ToString(b);
						a = 0;
							 label1->Text = "";
							 con = false;
		 }
		 }
private: System::Void button11_Click(System::Object^  sender, System::EventArgs^  e) { //-
			 if(textBox1->Text == "0" && label1->Text == "/"){ textBox1->Text = "Невозможно делить на ноль"; label1->Text = "";}
			 else{
			 			 if(label1->Text != ""){			  
				             switch(label1->Text[0])
		   {
		   case '+':
			   b =  a + Convert::ToDouble(textBox1->Text);
			   break;
           case '-':
			   b = a - Convert::ToDouble(textBox1->Text);
			   break;
		   case '*':
			   b = a * Convert::ToDouble(textBox1->Text);
			   break;
		   case '/':
			   b =  a / Convert::ToDouble(textBox1->Text);
			   break;

		   } 
                        label2->Text = Convert::ToString(b);
						a = b;
							 label1->Text = "-"; textBox1->Text = "";
			 } else {
			   a = Convert::ToDouble(textBox1->Text);
			   label1->Text = "-";
			   textBox1->Text = "";
			   
							 }
			 }
		 }
private: System::Void button12_Click(System::Object^  sender, System::EventArgs^  e) { //*
			 if(textBox1->Text == "0" && label1->Text == "/"){ textBox1->Text = "Невозможно делить на ноль"; label1->Text = "";}
			 else{
			 			 if(label1->Text != ""){			  
				             switch(label1->Text[0])
		   {
		   case '+':
			   b =  a + Convert::ToDouble(textBox1->Text);
			   break;
           case '-':
			   b = a - Convert::ToDouble(textBox1->Text);
			   break;
		   case '*':
			   b = a * Convert::ToDouble(textBox1->Text);
			   break;
		   case '/':
			   b =  a / Convert::ToDouble(textBox1->Text);
			   break;

		   } 
                        label2->Text = Convert::ToString(b);
						a = b;
							 label1->Text = "*"; textBox1->Text = "";
			 } else {
			   a = Convert::ToDouble(textBox1->Text);
			   label1->Text = "*";
			   textBox1->Text = "";
			   
							 }
			 }
		 }
private: System::Void button16_Click(System::Object^  sender, System::EventArgs^  e) {//деление
			 if(textBox1->Text == "0" && label1->Text == "/"){ textBox1->Text = "Невозможно делить на ноль"; label1->Text = "";}
			 else{
			 			 if(label1->Text != ""){			  
				             switch(label1->Text[0])
		   {
		   case '+':
			   b =  a + Convert::ToDouble(textBox1->Text);
			   break;
           case '-':
			   b = a - Convert::ToDouble(textBox1->Text);
			   break;
		   case '*':
			   b = a * Convert::ToDouble(textBox1->Text);
			   break;
		   case '/':
			   b =  a / Convert::ToDouble(textBox1->Text);
			   break;

		   } 
                        label2->Text = Convert::ToString(b);
						a = b;
							 label1->Text = "/"; textBox1->Text = "";
			 } else {
			   a = Convert::ToDouble(textBox1->Text);
			   label1->Text = "/";
			   textBox1->Text = "";
			   
							 }
			 }
		 }
private: System::Void button14_Click(System::Object^  sender, System::EventArgs^  e) {
			 if(!textBox1->Text->Contains(",") && textBox1->Text != "")
			 textBox1->Text += ",";	
			 
		 }
private: System::Void button15_Click(System::Object^  sender, System::EventArgs^  e) {//очистка на С
			 a = 0;
			 b = 0;
			 label1->Text = ""; 
			 label2->Text = "";
			 textBox1->Text = "";
			 
		 }
private: System::Void button18_Click(System::Object^  sender, System::EventArgs^  e) {
			 if(textBox1->Text != "") save = Convert::ToDouble(textBox1->Text);
		 }
private: System::Void button19_Click(System::Object^  sender, System::EventArgs^  e) {
			 textBox1->Text = Convert::ToString(save);
		 }
private: System::Void button20_Click(System::Object^  sender, System::EventArgs^  e) {
             save = 0;			 
		 }
private: System::Void button21_Click(System::Object^  sender, System::EventArgs^  e) {
			 if(textBox1->Text == "") textBox1->Text = "-";
			 else if(textBox1->Text == "-") textBox1->Text = "";
			 else textBox1->Text = Convert::ToString(-1 * Convert::ToDouble(textBox1->Text)); //ставим "-"
		 }
private: System::Void button22_Click(System::Object^  sender, System::EventArgs^  e) {
			 textBox1->Text = "";	 
		 }
};
}

                                      
    


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