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M105 Tutor-Marked Assignment
Question One: [10 marks]
a. Write a Java class (program) that reads from the user the temperature in degrees Celsius as a real number. Then calculates and prints the equivalent temperature in degrees Fahrenheit (rounded to 1 decimal place). [9 marks]
b. Give the exact output of your program. Provide a snapshot representing the exact output of any value from your choice. [1 mark]
Hint:
Question Two: [20 marks]
a. Write a Java application that reads from the user three integers represent the lengths of three sides. Then checks if the three sides can form a triangle or not; and if they can, the application should also checks if the formed triangle is a right triangle or not. [17 marks]
b. Give the exact output of your application. Provide 3 snapshots representing the exact output of 3 different cases (i.e., the integers cannot form a triangle, can form a triangle but not a right one, or can form a right triangle). [3 marks]
Hints:
 Request from the user to enter the three sides from the shortest to the longest.
 Do not use the method Math.pow(). It will not give accurate results.
 Read about “the triangle inequality" in any algebraic geometry book, or search the internet in order to know when the lengths of three sides can form a triangle.
 Read about “the Pythagorean theorem" in any algebraic geometry book, or search the internet in order to know how to determine if a triangle is a right triangle or not.
Question Three: [15 marks]
a. The following code includes 10 errors (an error per line). Find these errors and classify them as a compilation error, a fatal logical error or a non-fatal logical error. [10 marks]
public class Q3_StudentID {
public static void main(String[] args) {
int x, y, my Num = 0;
double d = 10 + x; x = 3;
y = d + 2;
if (! x>5)
System.out.println('Result1 = ' + x);
Else
System.out.printIn("Result1 = " + y);
System.out.println("Result2 = %d" + myNum);
System.out.println("Result3 = " + x / myNum); myNum++;
System.out.printf("Result4 = %.0f\n" + d);
} // end main method
} // end Class Q3_StudentID
4
b. Rewrite the above code after correcting the errors. [1 mark]
c. Provide a snapshot representing the exact output after correcting the code. [1 mark]
d. Give the exact output of the following program. [3 marks]
import java.util.Scanner;
public class Q3_D {
public static void main(String[] args) {
int a = 4, b = 7, c;
System.out.println("Sum = " + a + b);
c = 5;
do {
System.out.printf("c = %-9d" , c);
if (c-- == 3)
break;
System.out.printf("OK\n" , c);
} while (c > 0);
double d = (c == 3) ? 1.5 : 2.5;
System.out.printf("d = %.2f\n", d);
double f = 6 + 3 / 2;
System.out.printf("f = %.2f\n", f);
if (a > b);
System.out.println("Done");
} // end main method
} // end class Q3_D
Question Four: [15 marks]
a. Giving the following triangle for the number 4: 4 3 2 1 4 3 2 4 3 4 Write a Java application that reads from the user a positive integer. Then displays on the screen a similar triangle which depends on that integer, using tabs to separate numbers in the same line. [13 marks]
b. Give the exact output of your application. Provide 2 snapshots representing the exact output of 2 different values. [2 marks]
5
Question Five: [30 marks]
a. Write a Java application that does the following: [28 marks]
 Reads an integer from the user represents the number of the students in a class.
 Reads the scores of the students from the user (the user should enter the scores in one line separated by spaces).
 Calculates and prints the average of the passed students (rounded to 2 decimal places).
 Calculates and prints the number of the students whose scores are more than the average of the passed students.
b. Give the exact output of your application. Provide 2 snapshots representing the exact output of 2 different inputs. [2 marks]
Hints:
 Assume that the scores of the students are integers between 0 and 100 (inclusive)
 Assume that there is at least one passed student in the class
 The student considered to be “passed” if his/her score is greater than or equal to 50.
Sample Input: Enter the number of the students in the class: 5 Enter the scores of the 5 students: 90 80 40 60 70
Sample Output: The average of the passed students is: 75.00 There are 2 students whose scores are more than the average of the passed students.
6
Question Six: [30 marks]
a. Write a Java method called distance that calculates the distance between 2 points in the xy coordinate system. The method takes 4 integers x1 , y1,x2 and y2 as arguments which represent the x and y coordinates of the 2 points, respectively. Then it calculates and returns the distance as a real number according to the following formula: [6 marks]
√
b. Include your method into a Java program that reads a sequence of inputs. Each input consists of 4 integers represent the x and y coordinates of 2 points in the xy coordinate system in the following order: x1 , y1,x2 then y2 The program invokes (calls) the method distance and prints the result for each input (rounded to 2 decimal places). The user could stop the program via entering the value 0 for all the coordinates. At the end, the program should prints the longest calculated distance (rounded to 2 decimal places). [23 marks]
c. Give the exact output of your program. Provide a snapshot representing the exact output of a sequence of at least 3 inputs before the user enters the value 0 for all the coordinates. [1 mark]
Sample Input and Output: To halt the program, enter 0 for all the coordinates The coordinates of any point should be separated by a single space ------------------------------------------------------------------ Enter the x and y coordinates of the first point: 1 1 Enter the x and y coordinates of the second point: 1 3 The distance between (1,1) and (1,3) is 2.00 Enter the x and y coordinates of the first point: 2 3 Enter the x and y coordinates of the second point: 6 7 The distance between (2,3) and (6,7) is 5.66 Enter the x and y coordinates of the first point: 0 0 Enter the x and y coordinates of the second point: 4 5 The distance between (0,0) and (4,5) is 6.40 Enter the x and y coordinates of the first point: 0 0 Enter the x and y coordinates of the second point: 0 0 ------------------------------------------------------------------ The longest calculated distance is: 6.40

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للحصول على حل الواجب المطلوب : ارسل بريد الكتروني الى:
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