# 物件導向程式設計實習
[題目](https://hackmd.io/SyXojYMDa)，[作業](https://hackmd.io/BJ4nWVVpa)
## 0124
### 截圖
變數和字串
變數使用
如果、迴圈
清單(陣列)
### 心得
學習C#是有挑戰性但也挺有趣的過程。C#是物件導向語言，著重於設計和使用類別、物件、繼承和多型(有助於寫出結構化、模組化的程式)，有點像C++。基本語法:變數、運算符、條件語句、迴圈等基本概念...又是要記的東西了...。
## 0221
### 練習1

Console.Write("請輸入你的名字:");
string n = Console.ReadLine();
Console.WriteLine($"Good Day {n}");

### 練習2

Console.Write("請輸入名稱：");
string? n = Console.ReadLine();
Console.Write("請輸入提款金額：");
int m = Convert.ToInt32(Console.ReadLine());
Console.WriteLine($"Hi {n}, 提款金額：{m:C0}");

### 練習3

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 _20240221._2
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            label1.Text = DateTime.Now.ToString();
        }

        private void button1_Click_1(object sender, EventArgs e)
        {
            label1.Text = "";
        }
    }
}

## 0306
### 練習1

using static System.Console;
WriteLine("資訊一甲 2 王言淵");
WriteLine(" ");
int n1 = 1_2_3;
long n2 = 456_789_123L;

long max = Int64.MaxValue;
long min = Int64.MinValue;
int n3  = 0b1011_110;
int n4 = 0b_111_100_11;
int n5 = 0xFFFF;
WriteLine($"Number:{n1:NO},{n2:n0}");

WriteLine($"二進位變十進位:{n3:D5},{n4:D4},{n5:D6}");
WriteLine($".NET Framework型別(num1):{n1.GetType()}");
WriteLine($".NET Framework型別(num2):{n2.GetType()}");

### 練習2

using static System.Console;
float f = 1.2233446F;
double d = 1.22334455667789;
decimal de = 1.2233445566778899;

WriteLine($"float   :{f}");
WriteLine($"double  :{d}");
WriteLine($"decimal :{de}");

WriteLine($"float:{f}");

### 練習3

using static System.Console;
const float s = 0.579F;
Write("請輸入坪數:");
float a = Convert.ToSingle(ReadLine());
WriteLine($"{a}坪 = {s * a}平方公尺");
const float pi = 3.141592653589793238462643383279502884F;
const float c = pi * 25.0F;
WriteLine($"圓面積={c}");

### 練習4

using static System.Console;
WriteLine("資訊一甲 2 王言淵");
WriteLine("請輸入你的生日");
string b = ReadLine()
WriteLine($"Number:{n1:NO},{n2:n0}");

WriteLine($"二進位變十進位:{n3:D5},{n4:D4},{n5:D6}");
WriteLine($".NET Framework型別(num1):{n1.GetType()}");
WriteLine($".NET Framework型別(num2):{n2.GetType()}");

## 0313
### 練習1

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 _0313
{
    public partial class Form1 : Form
    {
        public Form1()
        {InitializeComponent();}

        private void textBox1_TextChanged(object sender, EventArgs e)
        {}

        private void button1_Click(object sender, EventArgs e)
        {
            try {
                double f,c ;
                c= Convert.ToDouble(textBox1.Text);
                f=(c * 9 / 5) + 32;
                textBox2.Text = Convert.ToString(f);
                textBox1.Focus();
            } 
            catch
            {
                textBox2.Text = "輸入錯誤";
                textBox1 = null;
            }
        }
    }
}

### 練習2

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 _0313
{
    public partial class Form1 : Form
    {
        public Form1()
        {InitializeComponent();}

        private void button1_Click(object sender, EventArgs e)
        {
            try
            {
                label4.Text = "提款金額" + textBox2.Text;
            }
            catch
            {

            }
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            string name = Microsoft.VisualBasic.Interaction.InputBox("請輸入姓名","輸入");
            DialogResult dr = MessageBox.Show(name+"歡迎!", "歡迎",
                MessageBoxButtons.OK, MessageBoxIcon.Asterisk);
            Text = name;
        }

    }
}

## 0320
### 練習1

using static System.Console;
int sum = 0, count = 0;
for (; ; ) {
    Write("請輸入數值做加總:");
    int n = Convert.ToInt32(ReadLine());
    count += 1;//計數器累計次數
    sum += n;//儲存數值
    Write("還要繼續嗎?(Y繼續,N離開)");
    string? endkey = ReadLine();
    if (endkey == "Y")
        continue; //繼續執行
    else if (endkey == "N") { break; }
}
WriteLine($"輸入{count}個數值,合計:{sum}");
ReadKey();

## 0327
### 練習1

string[] name = ["Molly", "Eric", "Johseph", "Peter", "Iron", "Priyanka"];
int[] age = [24, 26, 24, 26, 28, 25];
Console.WriteLine("---年齡符合24歲---");
for (int i = 0; i < age.Length; i++){
if (age[i] == 24){Console.Write(name[i] + "   ");}
}
Console.WriteLine("\n");
Array.Sort(age);
int pos = Array.IndexOf(age, 25);
Console.Write($"找到年齡25! 位置:{pos}");

### 練習2

Console.WriteLine("Mary      Tomas      John");
Random rnd = new Random(Guid.NewGuid().GetHashCode());
long[] sum = { 0, 0, 0 };
for (int i = 0; i < 3; i++)
{
    for (int j = 0; j < 3; j++)
    {
        long randomNumber = rnd.Next(40)+60;
        sum[j] = sum[j] + randomNumber;
        Console.Write($"{randomNumber}        ");
    }
    Console.WriteLine();
}
Console.WriteLine("---------------------");
Console.Write("Sum:  ");
for (int i = 0; i < 3; i++)
{
    Console.Write($"{sum[i]}    ");
}

### 練習3

Random r = new Random(Guid.NewGuid().GetHashCode());
int f=r.Next(50) + 10,i=0,j=0,k=0;
var save = new int[2, 2, 3]{{ 
    { r.Next(50) + 10, r.Next(50) + 10, r.Next(50) + 10},
    { r.Next(50) + 10, r.Next(50) + 10, r.Next(50) + 10}},
{   { r.Next(50) + 10, r.Next(50) + 10, r.Next(50) + 10},
    { r.Next(50) + 10, r.Next(50) + 10, r.Next(50) + 10}
}};
for (k = 0; k < 2; k++)
{
    for (i = 0; i < 2; i++)
    {
        for (j = 0; j < 3; j++)
        {
            if (save[k, i, j] == f) { break; };
        }
    }
}
Console.WriteLine($"元素:{f},位於第{k}個表格,位於第{i}列 第{j}欄\n表格2個,二維表格2*3");

long[] sum = { 0, 0, 0 };

for (k = 0; k < 2; k++)
{
    Console.WriteLine($"-------表格{k + 1}--------");
    for (i = 0; i < 2; i++)
    {
        for (j = 0; j < 3; j++)
        {
            Console.Write($"{save[k,i,j]}  |  ");
        }
        Console.WriteLine();
    }
}

## 0410
### 練習1

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 _0410
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void trackBar2_Scroll(object sender, EventArgs e)
        {

        }

        private void Form1_Load(object sender, EventArgs e)
        {
            PicShow.SizeMode = PictureBoxSizeMode.StretchImage;
            PicShow.Height = 90; PicShow.Width = 90;    // 設定圖片高度和寬度
            PicShow.Image = Image.FromFile("C:\\Users\\user\\Pictures\\1.png");    // 載入圖檔
            TkbPic.Maximum = 4; TkbPic.Minimum = 1;// 設定TkbPic的最大、最小值
            VsbHeight.Maximum = 180; VsbHeight.Minimum = 1; // 設定最大、最小值
            VsbHeight.LargeChange = 1;      // 設定VsbHeight的快動值 = 1
            VsbHeight.Value = PicShow.Height;   // VsbHeight的Value值=圖片高度
            HsbWidth.Maximum = 180; HsbWidth.Minimum = 1;  // 設定最大、最小值
            HsbWidth.LargeChange = 1;       // 設定HsbWidth的快動值 = 1
            HsbWidth.Value = PicShow.Width; // HsbWidth的Value值=圖片寬度
            Ttip.SetToolTip(VsbHeight, $"{VsbHeight.Value}");
            Ttip.SetToolTip(HsbWidth, $"{HsbWidth.Value}");
            Ttip.SetToolTip(TkbPic, "圖片1");
        }
        private void HsbWidth_Scroll(object sender, ScrollEventArgs e)
        {
            PicShow.Width = HsbWidth.Value;
            Ttip.SetToolTip(HsbWidth, $"{HsbWidth.Value}");
        }

        private void VsbHeight_Scroll(object sender, ScrollEventArgs e)
        {
            PicShow.Height = VsbHeight.Value;
            Ttip.SetToolTip(VsbHeight, $"{VsbHeight.Value}");
        }

        private void TkbPic_Scroll(object sender, EventArgs e)
        {
            PicShow.Image = Image.FromFile($"C:\\Users\\user\\Pictures\\{TkbPic.Value}.png");
            Ttip.SetToolTip(TkbPic, $"圖片{TkbPic.Value}");
        }
    }
}

:::spoiler 其他截圖
:::
### 練習2

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 _0410
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }


        private void Form1_Load(object sender, EventArgs e)
        {
            DtpAlarm.CustomFormat = "yyyy-MM-dd HH:mm";
            DtpAlarm.Format = DateTimePickerFormat.Custom;
            DtpAlarm.MinDate = DateTime.Now.AddMinutes(1);
            DtpAlarm.MaxDate = DateTime.Now.AddDays(7);
        }

        private void button1_Click(object sender, EventArgs e)
        {
            timerl.Interval = 1000;
            timerl.Enabled = true;
            DtpAlarm.Enabled = false;
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            if (DateTime.Now >= DtpAlarm.Value)
            {
                timerl.Enabled = false;
                System.Media.SystemSounds.Beep.Play(); // 發出系統Beep聲
                MessageBox.Show(textBox1. Text,"提示");
            }
        }
    }
}

## 0417
### 練習3

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 _0417
{
    public partial class Form1 : Form
    {
        public Form1()
        {InitializeComponent();}

        private void linkLabel1_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
        {
            linkLabel1.Text = "Visual Studio web";
            System.Diagnostics.Process.Start("https://visualstudio.microsoft.com/zh-hant/");
        }

        private void linkLabel2_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
        {
            System.Diagnostics.Process.Start("C:\\Users\\user\\Downloads\\20240306w\\20240306w\\bin\\Debug\\20240306w.exe");
        }
    }
}