相隔一個禮拜未做練習

Console.Title = "練習";

Console.BackgroundColor = ConsoleColor.Red;
Console.ForegroundColor = ConsoleColor.White;

Console.WindowHeight = 120;

Console.WriteLine("請輸入您的名稱");

String userName = (Console.ReadLine());

Console.WriteLine(("Hello " + userName + "!" ));

• 複習基本功能

Console.Title = "計算相加";

int num01;
int num02;

Console.Write("請輸入數字");
    num01 = Convert.ToInt32(Console.ReadLine());

Console.Write("請輸入另一個數字");
    num02 = Convert.ToInt32(Console.ReadLine());

int result = num01 + num02;

Console.WriteLine("相加結果為" + result);

• 賦予變數功能

Console.Title = "計算平均";

Console.WriteLine("接下來計算三個數相加");

Double num3,num4,num5;

Console.Write("請輸入第一個數字");
    num3 = Convert.ToDouble(Console.ReadLine());

Console.Write("請輸入第二個數字");
    num4 = Convert.ToDouble(Console.ReadLine());

Console.Write("請輸入第三個數字");
    num5 = Convert.ToDouble(Console.ReadLine());

Console.WriteLine("你輸入的數字為" + num3 + " " + num4 + " " + num5);

Double answer3  = (num3 + num4 + num5)/3;

Console.WriteLine("三個數的平均數為" + answer3);

• 同時賦予三個變數並計算平均值

Console.Title = "IF-ELSE練習 比大小";

Console.WriteLine("請輸入兩個數字");
Console.Write("數字1為：");

Double num1 = Convert.ToDouble(Console.ReadLine());

Console.Write("數字2為：");

Double num2 = Convert.ToDouble(Console.ReadLine());

if (num1 > num2)
    { Console.WriteLine(num1 + "大於" + num2); }
else if (num1 < num2)
    { Console.WriteLine(num1 + "小於" + num2); }
else
    { Console.WriteLine(num1 + "等於" + num2); }

• if-else練習_1比大小

Console.Title = "if-else 練習 賣場周年慶折扣";

//Console.WriteLine("您好，請輸入購買金額");

//int cost = Convert.ToInt32(Console.ReadLine());

//if (cost >= 10000)
    //{ Console.WriteLine(("恭喜您，優惠折扣為7折 \\n 應付金額為 ")
            //+ cost*0.7  + "元");}
//else if (cost >= 5000 && cost < 10000)
    //{ Console.WriteLine(("恭喜您，優惠折扣為8折 \\n 應付金額為 ")
            //+ cost*0.8  + "元");}
//if (cost >= 1000 && cost < 5000)
    //{ Console.WriteLine(("恭喜您，優惠折扣為9折 \\n 應付金額為 ")
            //+ cost * 0.9 + "元");}
//else
    //{ Console.WriteLine("折扣無效"); }

↑這邊有更輕鬆的做法，將折扣也設為float，效果如下↓

double discount;

Console.Write("您好，請輸入購買金額:");
int cost = Convert.ToInt32(Console.ReadLine());

if (cost >= 10000)
    { discount = 0.7; }
else if (cost >= 5000 && cost < 10000)
    { discount = 0.8; }
else if (cost >= 1000 && cost < 5000)
    { discount = 0.9; }
else
    { Console.WriteLine("抱歉，金額未到折扣標準");
    discount = 1; }

double finalCost = cost * discount;

Console.WriteLine("恭喜您，優惠折扣為" + discount + 
    "OFF\\n應付金額為" + finalCost + "元");

• if-else練習_2 折扣(金額計算)

 Console.Title = "switch-case練習 武器推薦";

 Console.WriteLine("遊戲中的武器推薦 \\n 選擇您的敵人");
 Console.Write("1.殭屍 2.骷顱弓箭手 3.遠距離法師");

 int enemyType = Convert.ToInt32(Console.ReadLine());

 switch (enemyType)
 {    case 1:
         Console.WriteLine("適合的武器為 劍！");
         break;
     case 2:
         Console.WriteLine("適合的武器為 弓！");
         break;
     case 3:
         Console.WriteLine("適合的武器為 法杖！");
         break;
     default:
         Console.WriteLine("適合空手揍爆");
         break;
 }

• switch-case練習 輸入指定數值給出循環答案

Console.Title = "FOR練習 九九乘法表";

Console.WriteLine("九九乘法表");

// 定義一個整數類型的變數 result01
int result01;

// 迴圈從1運行到10，包含1和10
for (int i = 1; i <= 10; i++)
{
    for (int j = 1; j <= 10; j++)
    {
        result01 = i * j;
        Console.WriteLine(i + "x" + j + "=" + result01);
    }
    // 這段代碼用於生成並打印1到10的乘法表
}

• for迴圈練習 輸出i 與 j 相乘的結果 藉由迴圈達成print九九乘法表