練習問題

Question02-Expressions/src/main/java/Q2_1.java

@@ -0,0 +1,27 @@
+
+public class Q2_1 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		
+		int sum;
+		int diff;
+		int mulch;
+		int div;
+		int rem;
+		
+		sum = 6+2;
+		diff = 6-2;
+		mulch = 6*2;
+		div = 6/2;
+		rem = 17%5;
+		
+				System.out.println("変数sum  :"+(sum));
+				System.out.println("変数diff :"+(diff));
+				System.out.println("変数mulch:"+(mulch));
+				System.out.println("変数div  :"+(div));
+				System.out.println("変数rem  :"+(rem));
+				
+	}
+
+}

Question02-Expressions/src/main/java/Q2_2.java

@@ -0,0 +1,14 @@
+
+public class Q2_2 {
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		String Lastname;
+		String Firstname;
+		
+		Lastname = "山田";
+		Firstname = "太郎";
+		
+		System.out.println((Lastname)+(Firstname));
+		
+	}
+}

Question02-Expressions/src/main/java/Q2_3.java

@@ -0,0 +1,11 @@
+
+public class Q2_3 {
+	public static void main(String[] args) {
+		
+		int num = 10;
+		num = num + 5;
+		
+		System.out.println(num);
+		
+	}
+}

Question02-Expressions/src/main/java/Q2_4.java

@@ -0,0 +1,14 @@
+
+public class Q2_4 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		double sum;
+		sum = 10 + 3.14;
+		
+		System.out.println(sum);
+		
+		
+	}
+
+}

Question02-Expressions/src/main/java/Q2_5.java

@@ -0,0 +1,17 @@
+
+public class Q2_5 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		int age;
+		int diff;
+		
+		age = 20;
+		diff = 5;
+		
+		
+		System.out.println("山田さんは"+age+"歳です");
+		System.out.println(diff+"年後には"+(age + diff)+"歳になります");
+	}
+
+}

Question02-Expressions/src/main/java/Q2_6.java

@@ -0,0 +1,20 @@
+
+public class Q2_6 {
+	public static void main(String[] args) {
+		float num1;
+		float num2;
+		float result;
+		
+		double kotaewakaran;
+		
+		num1 = 9;
+		num2 = 2;
+		
+		result = (float)num1/num2;
+		
+		kotaewakaran = (double)9/2;
+		
+		System.out.println(result);
+		System.out.println(kotaewakaran);
+	}
+}

Question02-Expressions/src/main/java/Q2_7.java

@@ -0,0 +1,12 @@
+
+public class Q2_7 {
+	public static void main(String[] args) {
+		double num;
+		num = 1.0;
+		
+		
+		
+		System.out.println((int)num);
+		
+	}
+}

Question02-Expressions/src/main/java/Q2_8.java

@@ -0,0 +1,20 @@
+
+public class Q2_8 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		double money = 1000;
+		double price = 580;
+		double taxRate = 0.08;
+		
+		int amount;
+		
+		amount = (int)(price * (1 + taxRate));
+		
+		System.out.println("残金は"+(int)(money-amount)+"円です。");
+		
+		
+		
+	}
+
+}