10/30自習

Question02-Expressions/.classpath

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+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-21"/>
+	<classpathentry kind="src" path="src/main/java"/>
+	<classpathentry kind="output" path="build/classes"/>
+</classpath>

Question02-Expressions/.gitignore

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+/build/

Question02-Expressions/.project

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+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>Question02-Expressions</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.wst.common.project.facet.core.builder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.wst.common.project.facet.core.nature</nature>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+	</natures>
+</projectDescription>

Question02-Expressions/.settings/org.eclipse.jdt.core.prefs

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+eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=21
+org.eclipse.jdt.core.compiler.compliance=21
+org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
+org.eclipse.jdt.core.compiler.problem.enablePreviewFeatures=disabled
+org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
+org.eclipse.jdt.core.compiler.problem.reportPreviewFeatures=warning
+org.eclipse.jdt.core.compiler.release=enabled
+org.eclipse.jdt.core.compiler.source=21

Question02-Expressions/.settings/org.eclipse.wst.common.project.facet.core.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<faceted-project>
+  <installed facet="java" version="21"/>
+</faceted-project>

Question02-Expressions/src/main/java/Question02_1.java

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+
+public class Question02_1 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		String s = "変数";
+		
+		int numa = 2;
+		int numb = 5;
+		int numc = 6;
+		int numd = 17;
+		
+		//sum
+		int sum = numc + numa;
+		System.out.println(s + "sum" + "  :" + sum);
+		
+		//diff
+		int diff = numc - numa;
+		System.out.println(s + "diff" + " :" + diff);
+		
+		//mulch
+		int mulch = numc * numa;
+		System.out.println(s + "mulch" + ":" + mulch);
+		
+		//div
+		int div = numc / numa;
+		System.out.println(s + "div" + "  :" + div);
+		
+		//rem
+		int rem = numd % numb;
+		System.out.println(s + "rem" + "  :" + rem);
+ 
+	}
+
+}

Question02-Expressions/src/main/java/Question02_2.java

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+
+public class Question02_2 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		String lastName = "山田";
+		String firstName = "太郎";
+		
+		System.out.println(lastName + firstName);
+
+	}
+
+}

Question02-Expressions/src/main/java/Question02_3.java

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+
+public class Question02_3 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		int num = 10;
+		num = num + 5;
+		
+		System.out.println(num);
+
+	}
+
+}

Question02-Expressions/src/main/java/Question02_4.java

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+
+public class Question02_4 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		int sum1 = 10;
+		double sum2 = 3.14;
+		
+		double sum = sum1 + sum2;
+		
+		System.out.println(sum);
+
+	}
+
+}

Question02-Expressions/src/main/java/Question02_5.java

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+
+public class Question02_5 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		
+		int age = 20;
+		int diff = 5;
+		
+		System.out.println("山田さんは" + age + "歳です。");
+		System.out.println(diff + "年後には" + (age + diff) + "になります。");
+
+	}
+
+}

Question02-Expressions/src/main/java/Question02_6.java

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+
+public class Question02_6 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		double a = 9;
+		double b = 2;
+		
+		System.out.println(a / b);
+
+	}
+
+}

Question02-Expressions/src/main/java/Question02_7.java

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+
+public class Question02_7 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		double num = 1.0;
+		
+		System.out.println((int)num);
+
+	}
+
+}

Question02-Expressions/src/main/java/Question02_8.java

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+
+public class Question02_8 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		int money = 1000;
+		int price = 580;
+		double taxRate = 0.08;
+		
+		int total = price + (int)(price * taxRate);
+		money = money - total;
+		
+		System.out.println("残金は" + money + "円です。");
+
+	}
+
+}