frage wegen Form visual c++ und einer formel für fahrenheit
-
Hallo liebe Freunde von cplusplus Forum
private: System::Void button2_Click(System::Object^ sender, System::EventArgs^ e)
{
// hier möchte ich gerne eine Formel ausgeben z.B. Fahrenheit nach Celsius berechnen
// fahrenheit = ((celsius * 9) / 5) + 32
}Ich fange gerade mit dem Programmieren an, habe Visual C++ 2005 express edition und baue mir eine Form, ein Formular mit zwei Texteingaben und ein Calculator Button... Jetzt möchte ich das gerne auch umsetzen, aber ich weiß nicht wie ?
vielleicht kann ja jemand helfen, wäre toll, liebe Grüße, Franziska
gesamter code sieht bisher so aus:
#pragma once
namespace loulou1 {
using namespace System;
using namespace System::ComponentModel;
using namespace System::Collections;
using namespace System::Windows::Forms;
using namespace System::Data;
using namespace System::Drawing;/// <summary>
/// Summary for Form1
///
/// WARNING: If you change the name of this class, you will need to change the
/// 'Resource File Name' property for the managed resource compiler tool
/// associated with all .resx files this class depends on. Otherwise,
/// the designers will not be able to interact properly with localized
/// resources associated with this form.
/// </summary>
public ref class Form1 : public System::Windows::Forms::Form
{
public:
Form1(void)
{
InitializeComponent();
//
//TODO: Add the constructor code here
//
}protected:
/// <summary>
/// Clean up any resources being used.
/// </summary>
~Form1()
{
if (components)
{
delete components;
}
}
private: System::Windows::Forms::Button^ button1;
private: System::Windows::Forms::Button^ button2;
private: System::Windows::Forms::TextBox^ textBox1;
private: System::Windows::Forms::TextBox^ textBox2;
protected:private:
/// <summary>
/// Required designer variable.
/// </summary>
System::ComponentModel::Container ^components;#pragma region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
void InitializeComponent(void)
{
this->button1 = (gcnew System::Windows::Forms::Button());
this->button2 = (gcnew System::Windows::Forms::Button());
this->textBox1 = (gcnew System::Windows::Forms::TextBox());
this->textBox2 = (gcnew System::Windows::Forms::TextBox());
this->SuspendLayout();
//
// button1
//
this->button1->Location = System::Drawing::Point(59, 125);
this->button1->Name = L"button1";
this->button1->Size = System::Drawing::Size(154, 78);
this->button1->TabIndex = 0;
this->button1->Text = L"say it to me";
this->button1->UseVisualStyleBackColor = true;
this->button1->MouseClick += gcnew System::Windows::Forms::MouseEventHandler(this, &Form1::button1_MouseClick);
//
// button2
//
this->button2->Location = System::Drawing::Point(120, 34);
this->button2->Name = L"button2";
this->button2->Size = System::Drawing::Size(92, 35);
this->button2->TabIndex = 1;
this->button2->Text = L"button2";
this->button2->UseVisualStyleBackColor = true;
this->button2->Click += gcnew System::EventHandler(this, &Form1::button2_Click);
//
// textBox1
//
this->textBox1->Location = System::Drawing::Point(20, 10);
this->textBox1->Name = L"textBox1";
this->textBox1->Size = System::Drawing::Size(55, 20);
this->textBox1->TabIndex = 2;
this->textBox1->Click += gcnew System::EventHandler(this, &Form1::textBox1_Click);
//
// textBox2
//
this->textBox2->Location = System::Drawing::Point(21, 78);
this->textBox2->Name = L"textBox2";
this->textBox2->Size = System::Drawing::Size(53, 20);
this->textBox2->TabIndex = 3;
this->textBox2->Click += gcnew System::EventHandler(this, &Form1::textBox2_Click);
//
// Form1
//
this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
this->ClientSize = System::Drawing::Size(292, 266);
this->Controls->Add(this->textBox2);
this->Controls->Add(this->textBox1);
this->Controls->Add(this->button2);
this->Controls->Add(this->button1);
this->Name = L"Form1";
this->Text = L"Form1";
this->ResumeLayout(false);
this->PerformLayout();}
#pragma endregion
private: System::Void button1_MouseClick(System::Object^ sender, System::Windows::Forms::MouseEventArgs^ e)
{
MessageBox::Show("Diese Eingabe ist nicht gültig","Fehler...",MessageBoxButtons::OK,MessageBoxIcon::Information,MessageBoxDefaultButton::Button1,MessageBoxOptions::DefaultDesktopOnly);
}
private: System::Void button2_Click(System::Object^ sender, System::EventArgs^ e)
{}
private: System::Void textBox1_Click(System::Object^ sender, System::EventArgs^ e)
{}
private: System::Void textBox2_Click(System::Object^ sender, System::EventArgs^ e)
{}
};
}
-
Hehe, okay^^ Sagen wir, du bekommst die Temperatur in °C in der textBox1 und willst dir °F in der textBox2 anzeigen lassen. Das wäre dann so möglich:
private: System::Void button2_Click(System::Object^ sender, System::EventArgs^ e) { textBox2->Text = (((Convert::ToDouble(textBox1->Text) * 9) / 5.0) + 32).ToString(); }MfG
-
super und danke schön, hab's eben ausprobiert und es "funzt" klasse!
vielen, herzl. Dank auch, bin ganz happy !
Gilt dieses Muster...
textBox2->Text = (((Convert::ToDouble(textBox1->Text) * 9) / 5.0) + 32).ToString();
auch für Formeln oder für Vektor Berechnungen z.B.??
Gibt es einen guten Link dafür wie ich mit Visual C++ da insgesamt weiter komme? Ich suche schon den ganzen Tag nach Material, uff... muss nicht in englisch sein, besser wäre ein gutes Tutorial in deutsch...
schönen Abend noch und vielleicht bis bald, habe Appetit bekommen, hamm
salute, Franzi
-
Bitte Codetags verwenden.