JAVA HOMEWORKS

Homework: Introduction to Java/////////////////////////////////////////////////////////

5 zadacha
                LocalDateTime today = LocalDateTime.now();
        System.out.println("Today is: " + today);
        LocalDateTime tomorrow = today.plusDays(1);
        System.out.println("Tomorrow will be: " + tomorrow);


6 zadacha

                Scanner input = new Scanner(System.in);
        int numa = input.nextInt();
        Scanner input1 = new Scanner(System.in);
        int numb = input1.nextInt();

        int sum = numa + numb;

        System.out.println(sum);


8 zadacha

                Scanner scanner = new Scanner(System.in);
                int n = scanner.nextInt();
                scanner.nextLine();
                String[] lines = new String[n];
                for (int i = 0; i < n; i++) {
                        lines[i] = scanner.nextLine();
                 }
                // Sort the array of strings
                Arrays.sort(lines);
                System.out.println();
                System.out.println();
                // Print the sorted array
                for (int i = 0; i < lines.length; i++) {
                        System.out.println(lines[i]);
                }


Homework: Java Syntax////////////////////////////////////////////////////////////////////////////////////


Problem 1.  Rectangle Area

                 Scanner input = new Scanner(System.in);
                 System.out.printf("pravougulnik- visochina = ",input);
                 int numa = input.nextInt();
                 Scanner input1 = new Scanner(System.in);
                 System.out.printf("pravougulnik- duljina = ",input1);
                 int numb = input1.nextInt();

                 int sum = numa * numb;
                 System.out.printf("pravougulnik area = " + sum);


Problem 2.  Triangle Area

             Scanner input = new Scanner(System.in);
             int ax = input.nextInt();
             Scanner input1 = new Scanner(System.in);
             int ay = input1.nextInt();
             Scanner input2 = new Scanner(System.in);
             int bx = input.nextInt();
             Scanner input3 = new Scanner(System.in);
             int by = input1.nextInt();
             Scanner input4 = new Scanner(System.in);
             int cx = input.nextInt();
             Scanner input5 = new Scanner(System.in);
             int cy = input1.nextInt();



    double a = Math.sqrt(Math.pow((cx - bx),2)+Math.pow((cy - by),2));
    double b = Math.sqrt(Math.pow((cx - ax),2)+Math.pow((cy - ay),2));
    double c = Math.sqrt(Math.pow((bx - ax),2)+Math.pow((by - ay),2));

            if(a + c > c && a + c > b && b + c > a)
            {
               double p = (a + b + c) / 2;
               double area = Math.sqrt(p*(p-a)*(p-b)*(p-c));
               area = Math.round(area);

               System.out.println("Yes");
               System.out.println((int)area);
            }
            else
            {
                System.out.println("No");
               c = Math.round(c,2); // tova e dr variant da zakruglqm do 2 znam ako napisha 3 she go zakrugli do 3 znak

               System.out.printf("{0:0.00}", c);
            }
            }



 problem 3 points inside figure

                //          Scanner input = new Scanner(System.in);
                //                      int h = input.nextInt();
            //              double h = 2.5;


            for (int i = 0; i < 10; i++)
            {
                 //////// X
                Scanner input1 = new Scanner(System.in);
                double x = input1.nextDouble();
                ///////// Y
                Scanner input2 = new Scanner(System.in);
                double y = input2.nextDouble();

                boolean box1 = ((x >= 12.5 && x <= 22.5) && (y >= 6 && y <= 8.5));
                boolean box2 = ((x >= 12.5 && x <= 17.5) && (y >= 8.5 && y <= 13.5));
                boolean box3 = ((x >= 20.0 && x <= 22.5) && (y >= 8.5 && y <= 13.5));

                if (box1 || box2 || box3)// moje i s if 1 zadachi C# 8 variant
                {
                        System.out.println("inside");
                }
                else
                {
                        System.out.println("outside");
               }
            }


Problem 4.  The Smallest of 3 Numbers

                 Scanner input = new Scanner(System.in);
                 System.out.printf("A ",input);
                 double numa = input.nextDouble();
                 Scanner input1 = new Scanner(System.in);
                 System.out.printf("B ",input1);
                 double numb = input1.nextDouble();
                 Scanner input2 = new Scanner(System.in);
                 System.out.printf("C ",input1);
                 double numc = input2.nextDouble();


                 double Smallest = 0;

                 if(numa > numb){
                     Smallest = numb;
                 }
                 else  {
                    Smallest = numa;
                 }
                 if(numc < Smallest){
                     Smallest = numc;
                 }

                 System.out.printf("Smallest " + Smallest);




 problem 9 .Points inside the House

                for (int i =0; i <= 20; i++){
               ///////////// x
               Scanner input = new Scanner(System.in);
               double x = input.nextDouble();
               ////////////// y
               Scanner input1 = new Scanner(System.in);
               double y = input1.nextDouble();



                 double x1 = 12.5;
                 double x2 = 17.5;
                 double x3 = 22.5;
                 double y1 = 8.5;
                 double y2 = 3.5;
                 double y3 = 8.5;
                 //////////////////////////////////


                 double ABC = Math.abs (x1 * (y2 - y3) + x2 * (y3 - y1) + x3 * (y1 - y2));
                 double ABP = Math.abs (x1 * (y2 - y) + x2 * (y - y1) + x * (y1 - y2));
                 double APC = Math.abs (x1 * (y - y3) + x * (y3 - y1) + x3 * (y1 - y));
                 double PBC = Math.abs (x * (y2 - y3) + x2 * (y3 - y) + x3 * (y - y2));

                 ///// triugulnik
              boolean isInTriangle = ABP + APC + PBC == ABC;
               /////////  kvadrati
              boolean box1 = ((x >= 12.5 && x <= 17.5) && (y >= 8.5 && y <= 13.5));
              boolean box2 = ((x >= 20.0 && x <= 22.5) && (y >= 8.5 && y <= 13.5));


             if (isInTriangle || box1 || box2)
             {
                 System.out.println("inside");
             }
                else
                {
                    System.out.println("outside");
                }