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赦有仲
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2 Outline 數料數數列亂數練

3 數數數來數數來數料利料來

4 數 A-Z a-z _ () 不數 0-9 數不數 SCHOOL School school 數讀 school_name schoolname 易不 C# my name 7_eleven B&Q new

5 C# (1) public protected private params override out operator object null new namespace long lock is internal interface int in implicit if goto foreach for float fixed finally false extern explicit event enum else double do delegate default decimal continue const class checked char catch case byte break bool base as abstract

6 C# (2) readonly ref return sbyte sealed short sizeof stackalloc static string struct switch this throw true try typeof uint ulong unchecked unsafe ushort using virtual volatile void while

7 Outline 數料數數列亂數練

8 料數數數林列參串列類

9 數 sbyte byte short ushort int uint long ulong 數 -128 ~ ~ ~ ~ ~ ~ ~ ~

10 數數來數數精度數 float ~ double 64 15~ ~ float 數數 f decimal 理數 28 數金林 bool 林 true false

11 串 char 來料來例 'A' 'a' '1' '2' 串 string 來串串料串來例 "my name is ives!!"

12 Outline 數料數數列亂數練

13 數數了留來料料數 ; int telnum; int telnum = 321; string myname; string myname = ives ; string myname = ; int i = 16, j, k;

14 例 sample1-a1 行列 "XXX!!" 行列 " XXX!! " 說 static void Main(string[] args) { Console.Write(""); } string username = Console.ReadLine(); Console.WriteLine(userName + "!!"); Console.WriteLine(" " + username + "!!" ); Console.ReadLine();

15 練 sample1-b1 行行行列 "XXX!! 行列 " XXX X!! " 念串數

16 Outline 數料數數列亂數練

17 數 (implicity) 數數例 int a = 321; long b = a; (explicity) 料例 long a = 123; int b = (int) a;

18 串數數串利 ToString() 來例 int a = 321; string b = a.tostring(); 串數利數 Parse() 來例 string b = "321"; int a = int.parse(b);

19 例 sample1-a2 (1) 串數料說說 // 料 float a = 3.14f; double b = 3.9; Console.Write(" : "); Console.Write("a = " + a); Console.WriteLine(", b = "+ b); Console.Write(" : "); Console.Write("a = " + (int)a); Console.WriteLine(", b = " + (int)b);

20 例 sample1-a2 (2) 說 // 串數 Console.Write(" 數 :"); string c = Console.ReadLine(); Console.WriteLine(c + " 1 " + (int.parse(c) + 1).ToString()); Console.ReadLine();

21 練 sample1-b2 練數數數數列來念讀料數理串

22 Outline 數料數數列亂數練

23 行數 + - * / 例 i = j + k; i = j - k; i = j * k; i = j / k; % 串串 int i = 16, j, k; j = i / 3; // j 5 k = i % 3; // k 1 i = j % k;

24 練 sample1-b3 列行 ( 數 ) 列念 Console.ReadLine() 讀來料串數

25 (1) 串數 (true) (false) ==!= > < >= <= 不例 i == j i!= j i > j i < j i >= j i <= j

26 (2) 4 > 3 // true 'a' > 'b' // false Unicode 來 a Unicode 97 b Unicode 98 b a

27 例 sample1-a3 數列數說 // 數 Console.Write(" 數 :"); int i = int.parse(console.readline()); Console.Write(" 數 :"); int j = int.parse(console.readline()); // 列 Console.WriteLine(i + " == " + j + " " + (i==j)); Console.WriteLine(i + "!= " + j + " " + (i!=j)); Console.WriteLine(i + " > " + j + " " + (i>j)); Console.WriteLine(i + " < " + j + " " + (i<j)); Console.WriteLine(i + " >= " + j + " " + (i>=j)); Console.WriteLine(i + " <= " + j + " " + (i<=j));

28 練 sample1-b4 數數 5 5 列 true 列 false 念利 > <=

29 來例 && i && j i j i j 若 i j!!i 若 i 若 i (4>3) && ('a'=='b') //(true) && (false) false (4>3) ('a'=='b') //(true) (false) true! (4>3) //!(true) false

30 (=) 來來例來 = i = 5 i = 5 += i += 5 i = i + 5 -= i -= 5 i = i - 5 *= i *= 5 i = i * 5 /= i /= 5 i = i / 5 %= i %= 5 i = i % 5

31 練 sample1-b5 ( 數 ) 列念利

32 來數數數 ++ 數例 i++ ++i -- 數 int a = 5, b = 5; int c = a++; //c 5 int d = ++b; //d 6 i-- --i

33 例 sample1-a4 說說 int i=10, j=0, x=10, y=0; j += ++i; Console.WriteLine("i ="+ i +", j = " + j); y += x++; Console.WriteLine("x =" + x +", y = " + y); Console.WriteLine("x =" + x++); Console.WriteLine("x =" + x);

34 a + b + c 行 a + b c a + b * c 行 b * c a (a + b) * c 行 a + b c a = b = c c b b a

35 Outline 數料數數列亂數練

36 數數數來料不數數 const double pi = ;

37 練 sample1-b6 ( 數 ) 列念數 pi = * * pi

38 Outline 數料數數列亂數練

39 列列來 ( 數 ) 列 int byte sbyte short ushort uint long ulong 列, 列不 enum language:long { English = 0, Chinese = 1 }

40 例 sample1-a5 列錄說 enum studentid:int { alice = 12, bob = 24 } static void Main(string[] args) { Console.WriteLine(studentID.alice + " : " + (int)studentid.alice); Console.WriteLine(studentID.bob + " : " + (int)studentid.bob); Console.ReadLine(); }

41 練 sample1-b7 列念利列數錄來 Sun = 1, Mon = 2, Tue = 3, Wed = 4, Thi = 5, Fri = 6, Sat = 7

42 Outline 數料數數列亂數練

43 料來不不 struct student { public int id; public string name; }

44 例 sample1-a6 利 struct 立 student 料說 struct student { public int id; public string name; } static void Main(string[] args) { student ives; ives.id = 27; ives.name = "ives"; } Console.WriteLine(": " + ives.name + "\n" + ": " + ives.id );

45 練 sample1-b8 利錄料列行年列料念利 struct 立 name age tel 料欄

46 Outline 數料數數列亂數練

47 亂數亂數來數亂數 Random 數 = new Random(); 亂數數.Next(, ) 亂數

48 例 sample1-a7 列 1 ~ 9 亂數說 // 亂數 Random rnd = new Random(); // 亂數 Console.WriteLine(rnd.Next(1,10)); Console.WriteLine(rnd.Next(1,10)); Console.WriteLine(rnd.Next(1,10));

49 練 sample1-b9 亂數 1 ~ 3 數數列 ture false 念利 Random Next

50 Outline 數料數數列亂數練

51 練 hw2 (1) Bob Alice 利數列 Bob Alice 了利 struct 錄 Bob Alice 列 Bob Alice 列 Bob 句

52 練 hw2 (2) 行

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untitled 1 Outline 流 ( ) 流 ( ) 流 ( ) 流 ( ) 流 ( ) 狀流 ( ) 利來行流 if () 立行 ; else 不立行 ; 例 sample2-a1 (1) 列 // 料 Console.Write(""); string name = Console.ReadLine(); Console.WriteLine(" " + name + "!!"); 例 sample2-a1