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   源码介绍

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IstTemp、SollTemp、DeltaTemp、Toleranz

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Heizungsregler
{
    public partial class Form1 : Form
    {
        // eigene globale Variablen
        float ist, soll, delta, tol;

        private void timer1_Tick(object sender, EventArgs e) //Timer
        {
            if (ist >= soll tol) delta = -delta;
            if (ist <= soll - tol) delta = Math.Abs(delta);  //Verwendung der Klasse Math  oder
                                                             //if (ist <= soll - tol) delta = absoluterBetrag(delta); //Aufruf eigener Funktion
            
            ist = ist delta;
            textBox1.Text = ist.ToString("0.00");
        }

        private float absoluterBetrag(float delt)  //eigene Funktion
        {
            if (delt < 0) delt = delt * (-1);
            return delt;
        }

        private void button3_Click(object sender, EventArgs e)  //
        {
            timer1.Enabled = false;
            Close();
        }

        public Form1()
        {
            InitializeComponent();
        }

        private void button2_Click(object sender, EventArgs e)  //Stopp
        {
            timer1.Enabled = false;
        }

        private void button1_Click(object sender, EventArgs e) //Start
        {
            //Eingaben
            ist = Convert.ToSingle(textBox1.Text);
            soll = Convert.ToSingle(textBox2.Text);
            delta = Convert.ToSingle(textBox3.Text);
            tol = Convert.ToSingle(textBox4.Text);

            //Timer an
            timer1.Enabled = true;

        }
    }
}