Other Programming & Computer Science Answers

Declare a variable to store text values.

9. Write short notes on:

a) Electronic mail

b) voice over IP

c) HTTP

d) FTP

Machine Exercise # 1 : Arrays and Strings

Write a program that uses a 3 3 3 array and randomly place each integer from 1 to 9 into the

nine squares. The program calculates the magic number by adding all the numbers in the array

and then dividing the sum by 3. The 3 3 3 array is a magic square if the sum of each row, each

column, and each diagonal is equal to the magic number. Your program must contain at least

the following functions: a function to randomly fill the array with the numbers and a function to

determine if the array is a magic square. Run these functions for some large number of times,

say 1,000, 10,000, or 1,000,000, and see the number of times the array is a magic square.

NOTE : SUBMISSION IN CPP FORMAT

a) Write a simple program to store some Employee objects in an ArrayList. Then display all the details of the objects in the ArrayList. Use the JOptionPane class for output.

b) Use the JOptionPane class to display only the name and surname of employees whose surname starts with the letter ‘M’. (Ensure that you have at least 2 such employees in the list).

Advanced: modify this functionality so that the start letter is not hard-coded, but the user can specify any letter, using the JOptionPane class for input.

c) Remove all employees whose salary is less than or equal to R5000. Then, using the JOptionPane class, display all the details of the remaining objects in the list.

d) Try to sort the contents of the list in alphabetical order of surname. Then, using the JOptionPane class, display all the details of the objects in the list.

e) Try to sort the contents of the list in ascending order of salary. Then, using the JOptionPane class, display all the details of the objects in the list.

Using Loop Statement, create a program that will be able to display student information such as, last name, first name, middle name, address.

Sample output:

Enter number of student: 2

Enter Last name: Sinco

Enter First name: Eddiemar

Enter Middle name: Garcia

Enter Address: Cabugao

Student 1

Name: Eddiemar Garcia Sinco

Address: Cabugao

Enter Last name: Sinco

Enter First name: Kent

Enter Middle name: Tiongson

Enter Address: Cabugao

Student 2:

Name: Kent Tiongson Sinco

Address: Cabugao

Using Loop Statement, create a program that will be able to display student information such as, last name, first name, middle name, address.

Sample output:

Enter number of student: 2

Enter Last name: Sinco

Enter First name: Eddiemar

Enter Middle name: Garcia

Enter Address: Cabugao

Student 1

Name: Eddiemar Garcia Sinco

Address: Cabugao

Enter Last name: Sinco

Enter First name: Kent

Enter Middle name: Tiongson

Enter Address: Cabugao

Student 2:

Name: Kent Tiongson Sinco

Address: Cabugao

Write a program using for loop statement that will display a series of number in ascending and descending order and it will also display the odd and even numbers.

Note: Use scanner and for loop statement

Sample output:

Enter a number: 15

Number in ASCENDING orders

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

Number in DESCENDING orders

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1

EVEN Number

2 4 6 8 10 12 14

ODD Number

1 3 5 7 9 11 13 15

Write a program using for loop statement that will display a series of number in ascending and descending order and it will also display the odd and even numbers.

Note: Use scanner and for loop statement

Sample output:

Enter a number: 15

Number in ASCENDING orders

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

Number in DESCENDING orders

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1

EVEN Number

2 4 6 8 10 12 14

ODD Number

1 3 5 7 9 11 13 15

Write a program using for loop statement that will display a series of number in ascending and descending order and it will also display the odd and even numbers.

Note: Use scanner and for loop statement

Sample output:

Enter a number: 15

Number in ASCENDING orders

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

Number in DESCENDING orders

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

EVEN Number

2

4

6

8

10

12

14

ODD Number

1

3

5

7

9

11

13

15

Write a program using for loop statement that will display a series of number in ascending and descending order and it will also display the odd and even numbers.

Note: Use scanner and for loop statement

Sample output:

Enter a number: 15

Number in ASCENDING orders

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

Number in DESCENDING orders

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

EVEN Number

2

4

6

8

10

12

14

ODD Number

1

3

5

7

9

11

13

15