update,

it114105/itp3914/Lab02/Ex1.java

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+/*
+   Filename:	 	Ex1.java
+   Programmer:	<YOUR NAME>
+   Description:	Determine the check digit of HKID numbers.
+*/
+
+import java.util.*;
+
+public class Ex1 { // Validate HKID
+    public static void main(String[] args) {
+        Scanner kb = new Scanner(System.in);
+        System.out.print("? ");
+        String str = kb.next();
+        char[] letter;
+        int sum;
+        int code;
+        letter = str.toCharArray();
+        letter[0] = Character.toUpperCase(letter[0]);
+        sum = ((int) letter[0] - 64) * 8;
+        sum = sum + ((int) letter[1] - 48) * 7;
+        sum = sum + ((int) letter[2] - 48) * 6;
+        sum = sum + ((int) letter[3] - 48) * 5;
+        sum = sum + ((int) letter[4] - 48) * 4;
+        sum = sum + ((int) letter[5] - 48) * 3;
+        sum = sum + ((int) letter[6] - 48) * 2;
+        code = 11 - (sum % 11);
+        System.out.print("The HKID is: " + letter[0] + str.substring(1, 7));
+        if (code == 11) {
+            System.out.println("(0)");
+        } else if (code == 10) {
+            System.out.println("(A)");
+        } else {
+            System.out.println("(" + code + ")");
+        }
+    }
+}

it114105/itp3914/Lab02/Ex2.java

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+import java.util.Scanner;
+
+public class Ex2 {
+    public static void main(String[] args) {
+        // Create a Scanner object for console input
+        Scanner input = new Scanner(System.in);
+        // Declare variables
+        double tc, hdlc, tg;
+
+        System.out.print("Enter TC: ");
+        tc = input.nextDouble();
+        System.out.print("Enter HDLC: ");
+        hdlc = input.nextDouble();
+        System.out.print("Enter TG: ");
+        tg = input.nextDouble();
+        System.out.println("result = " + (tc - hdlc - (tg / 5)));
+    }
+}

it114105/itp3914/Lab02/README.md.original

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+
+# Lab 2 Programming Practices 
+## Topic 2.1-2.3: Variables, Data Types, Operators
+
+### Exercise 1
+
+(a) Type the Java program ValidateHKID below with proper format (using indentations and blank lines appropriately, merge or break lines in a meaningful way, etc.).
+
+```java
+import java.util.*;
+
+public class Ex1{ //Validate HKID
+
+public static void main(String[] args) {
+
+Scanner kb=new Scanner(System.in);
+
+System.out.print("? ");
+
+String str=kb.next();
+
+char[] letter;
+
+int sum; int code;
+
+letter = str.toCharArray();
+
+letter[0] = Character.toUpperCase(letter[0]);
+
+sum = (
+
+(int)letter[0] -64 )
+
+*8;
+
+sum = sum + ( (int)letter[1] -48 )*7;
+
+sum = sum + ( (int)letter[2] -48 )*6;
+
+sum = sum + ( (int)letter[3] -48 )*5;
+
+sum = sum + ( (int)letter[4] -48 )*4;
+
+sum = sum + ( (int)letter[5] -48 )*3;
+
+sum = sum + ( (int)letter[6] -48 )*2;
+
+code = 11 - (sum % 11);
+
+System.out.print("The HKID is: "
+
++ letter[0] +
+
+str.substring(1,7));
+
+if(code == 11) {System.out.println("(0)");} else if(code == 10) {
+
+System.out.println("(A)");}
+
+else { System.out.println("(" + code +
+
+")"); }
+
+}}
+```
+
+(b) Compile and execute the program. State the purpose of the program.
+
+(c) At the top of your program, insert the following multi-comment to document who the writer of the program is. (Writing comments alongside program statements is called inline documentation.)
+```
+/*
+    Filename: Ex1.java
+    Programmer: <YOUR NAME>
+    Description: Determine the check digit of HKID numbers.
+*/
+```
+```
+c:\> java Ex1
+? A123456
+The HKID is: A123456(3)
+```
+
+### Exercise 2 Programming Exercise
+Total Cholesterol (TC, 總膽固醇), HDL cholesterol (HDLC, 高密度膽固醇), and triglyceride (TG, 甘油三酯) levels are measured directly from a blood sample. LDL cholesterol (LDLC, 低密度膽固醇) is calculated by using the formula:
+
+```math
+LDLC = TC - HDLC - \frac{TG}{5}
+```
+
+Write a Java program that prompts user to input TC, HDLC, and TG as double values and then calculate and display the LDLC as shown below.
+
+```
+c:\> java Ex2
+Enter TC : 234
+Enter HDLC : 66
+Enter TG : 104
+LDLC = 147.2
+```
+Study the program below for how keyboard input can be performed.
+```java
+import java.util.Scanner;
+
+public class Ex2 {
+
+    public static void main( String[] args ) {
+
+        // Create a Scanner object for console input
+        Scanner input = new Scanner(System.in);
+        // Declare variables
+        double n, j, result;
+        System.out.println( "This is a template program for console I/O." );
+        System.out.print( "Enter n: " );
+        n = input.nextDouble(); // input a double from keyboard
+        System.out.print( "Enter j: " );
+        j = input.nextDouble(); // input a double from keyboard
+        result = n + j;
+        System.out.println( "result = " + result );
+
+    }
+
+}
+```