C#, Lesson 1 of "Xiaobai Learning Programs": Getting to Know Programs

Said: The purpose of the sweeping monk practicing peerless martial arts is to sweep the floor cleaner.

1 text format

/// <summary>
/// Lesson 1 of "Xiaobai Learning Programs": Getting to Know Programs
/// </summary>
/// <param name="sender"></param>
/// <param name ="e"></param>
private void button1_Click(object sender, EventArgs e)
{     // #1 variable     // define some names for storing data ----- variable Variable     float a = 10;     int b = 20 ;     int d = 300;     float z = 30.5f;     // basic four arithmetic operations     float c = a / b + d * z;     // mathematical calculations and mathematical constants (such as pi, written as Math.PI)     double h = Math .Sin(30.0 * Math.PI / 180.0);

    // #2 Preliminary contact with variables
    // float and double are used to store floating point numbers (real numbers);
    // int is used to store integers;
    // float constants need to be followed by f or F

    // #3 output

    // The following is a "commented" line, indicating that this line does not participate in execution;
    // webBrowser1.DocumentText = c + " = " + a + " / " + b + " + " + d + " * " + z ;

    // Improved, you can change the font size and color output;
    webBrowser1.DocumentText =
        "<font style='font-size:22px;'>" + c +
        "</font> = <font color=red>" + a +
        "</font> / <font color=blue>" + b +
        "</font> + <font color=purple>" + d +
        "</font> * <font color=orange>" + z +
        " </font>";
}
 

2 code format

/// <summary>
/// 《小白学程序》第一课：初识程序
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void button1_Click(object sender, EventArgs e)
{
    // #1 变量
    // 定义一些用于存储数据的名称————变量Variable
    float a = 10;
    int b = 20;
    int d = 300;
    float z = 30.5f;
    // 基本的四则运算
    float c = a / b + d * z;
    // 数学计算与数学常数(比如圆周率 π，写作Math.PI)
    double h = Math.Sin(30.0 * Math.PI / 180.0);

    // #2 关于变量的初步接触
    // float 与 double 用于存储 浮点数（实数）；
    // int 用于存储整数；
    // float 的常数后面需要加个 f 或 F

    // #3 输出

    // 下面这样是 被“注释”的行，说明本行不参与执行；
    // webBrowser1.DocumentText = c + " = " + a + " / " + b + " + " + d + " * " + z;

    // 改进，可以改变 字体大小 与 颜色 的输出；
    webBrowser1.DocumentText =
        "<font style='font-size:22px;'>" + c +
        "</font> = <font color=red>" + a +
        "</font> / <font color=blue>" + b +
        "</font> + <font color=purple>" + d +
        "</font> * <font color=orange>" + z +
        "</font>";
}

Everyone did not learn programming well because there is no good programming textbook in the world.