Simple-Calculation -Exam problems

Author: TeodorDimitrov89

02.Simple-Calculation/src/Rectangle_Area_2D.java

@@ -8,9 +8,14 @@ public static void main(String[] args) {
 
         double x2 = Double.parseDouble(input.nextLine());
         double y2 = Double.parseDouble(input.nextLine());
-        double area = Math.abs((x1 - x2) * (y1 - y2));
-        double perimeter = (Math.abs((x1 - x2)) + Math.abs((y1 - y2))) * 2;
-        System.out.printf("%.0f%n", area);
-        System.out.printf("%.0f%n", perimeter);
+
+        double length = Math.abs(x1 - x2);
+        double height = Math.abs(y1 - y2);
+
+        double area = length * height;
+        double perimeter = 2 * length + 2* height;
+
+        System.out.println(area);
+        System.out.println(perimeter);
     }
 }

03.Simple-Calculations-ExamProblems/src/Change_Tiles.java

@@ -0,0 +1,24 @@
+import java.util.Scanner;
+
+public class Change_Tiles {
+    public static void main(String[] args) {
+        Scanner input = new Scanner(System.in);
+        int n = Integer.parseInt(input.nextLine());
+
+        double tilesWidth = Double.parseDouble(input.nextLine());
+        double tilesLength = Double.parseDouble(input.nextLine());
+        int benchWidth = Integer.parseInt(input.nextLine());
+        int benchLength = Integer.parseInt(input.nextLine());
+
+        double areaLanding = Math.pow(n,2);
+        double areaBench = benchWidth * benchLength;
+
+        double neededArea = areaLanding - areaBench;
+        double areaTiles = tilesWidth* tilesLength;
+
+        double totalTiles = neededArea / areaTiles;
+        double timeNeeded = totalTiles * 0.2;
+        System.out.printf("%.2f%n", totalTiles);
+        System.out.printf("%.2f", timeNeeded);
+    }
+}

03.Simple-Calculations-ExamProblems/src/Daily_Earnings.java

@@ -0,0 +1,19 @@
+import java.util.Scanner;
+
+public class Daily_Earnings {
+    public static void main(String[] args) {
+        Scanner input = new Scanner(System.in);
+        int workingDays = Integer.parseInt(input.nextLine());
+        double earnMoneyPerDay = Double.parseDouble(input.nextLine());
+        double monetaryRate = Double.parseDouble(input.nextLine());
+
+
+        double oneMonthSalary = workingDays * earnMoneyPerDay;
+        double incomePerYear = (oneMonthSalary * 12) + (oneMonthSalary * 2.5);
+        double taxRate = (25 * incomePerYear) / 100;
+
+        double totalIncomePerYear = (incomePerYear - taxRate) * monetaryRate;
+        double result = totalIncomePerYear / 365;
+        System.out.printf("%.2f", result);
+    }
+}

03.Simple-Calculations-ExamProblems/src/Money.java

@@ -0,0 +1,23 @@
+import java.util.Scanner;
+
+public class Money {
+    public static void main(String[] args) {
+        Scanner input = new Scanner(System.in);
+        int bitCoinCount = Integer.parseInt(input.nextLine());
+        double chineseYuan = Double.parseDouble(input.nextLine());
+        double commission = Double.parseDouble(input.nextLine());
+
+        // 1 биткойн = 1168 лева.
+        // 1 китайски юан = 0.15 долара.
+        // 1 долар = 1.76 лева.
+        // 1 евро = 1.95 лева.
+
+        double bitCoinInLevs = (double)bitCoinCount * 1168;
+        double chineseYuanInLevs = chineseYuan * 0.15 * 1.76;
+
+        double totalEuros = (bitCoinInLevs + chineseYuanInLevs) / 1.95;
+        double totalCommission = (commission * totalEuros) / 100;
+        double result = totalEuros - totalCommission;
+        System.out.printf("%.2f", result);
+    }
+}

03.Simple-Calculations-ExamProblems/src/Training_Lab.java

@@ -0,0 +1,14 @@
+import java.util.Scanner;
+
+public class Training_Lab {
+    public static void main(String[] args) {
+        Scanner input = new Scanner(System.in);
+        double width = Double.parseDouble(input.nextLine()) * 100;
+        double height = Double.parseDouble(input.nextLine()) * 100;
+
+        double rows = (Math.floor(width / 120));
+        height = Math.floor((height - 100) / 70);
+        double total = rows * height - 3;
+        System.out.println(total);
+    }
+}

03.Simple-Calculations-ExamProblems/src/Vegetable_Market.java

@@ -0,0 +1,16 @@
+import java.util.Scanner;
+
+public class Vegetable_Market {
+    public static void main(String[] args) {
+        Scanner input = new Scanner(System.in);
+        double euro = 1.94;
+        double priceForVegetables = Double.parseDouble(input.nextLine());
+        double priceForFruits = Double.parseDouble(input.nextLine());
+        int totalKgVegetables = Integer.parseInt(input.nextLine());
+        int totalKgFruits = Integer.parseInt(input.nextLine());
+        double totalVegetablesPrice = priceForVegetables * totalKgVegetables;
+        double totalFruitsPrice = priceForFruits * totalKgFruits;
+        double total = (totalVegetablesPrice + totalFruitsPrice) / euro;
+        System.out.printf("%.2f", total);
+    }
+}