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Cs Problem Set Answers

Essay by   •  December 19, 2015  •  Course Note  •  8,081 Words (33 Pages)  •  1,157 Views

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public class Problem3

/*

 *Write a method (an instance method)

      public boolean rowBingo(int c)

*that returns true if board has at least one row where no element in the row is the

*character given by the parameter c. Otherwise it returns false. (The first index of

*the array is the row index and the dimensions of the array are size by size.)

*/

{

        public static void main(String[] asd)  

        {

                Bingo bingo = new Bingo(4);//4 is the dimension of the square array

                boolean found = bingo.rowBingo(4);

                

                System.out.println(found);

        }

}

class Bingo

{   //   methods go here.....

    int [ ][ ] board = {{4,8,3,9}, {1,2,4,4}, {4,8,3,4}, {3,3,4,5}};

    int n;

   

    public Bingo(int size)

    {

            n = size;

    }

   

   

    public boolean rowBingo(int x)

    {

            boolean noElements;

            for(int r = 0; r < n; r++)

            {

                    noElements = true;

                    for(int c = 0; c < n; c++)

                    {

                            if(board[r][c] == x)

                            {

                                    noElements = false;

                                    break;

                            }

                            

                    }

                    if(noElements == true)

                {

                                    return true;

                }                    

            }

            return false;

            

    }

   

}



public class Problem4

/*

 *

 *Write a method (an instance method)

      public boolean theSame()

*that returns true if at least one row in the array board is the same as the first row.

* Otherwise it returns false. For instance in

    4  8  3  4

    3  5  5  1

    4  8  3  4

    9  2  4  9

*The 3rd is the same as the first row, so the method returns true.

*/

{

        public static void main(String[] asd)  

        {

                Bingo bingo = new Bingo(4);//4 is the dimension of the square array

                boolean found = bingo.theSame();

                

                System.out.println(found);

        }

}

class Bingo

{   //   methods go here.....

    int [ ][ ] board = {{4,8,3,4}, {1,2,4,4}, {4,8,3,9}, {3,3,4,5}};

    int n;

   

    public Bingo(int size)

    {

            n = size;

    }

   

   

    public boolean theSame()

    {

            boolean theSame;

            for(int r = 1; r < n; r++)

            {

                    theSame = true;

                    for(int c = 0; c < n; c++)

                    {

                            if(board[r][c] != board[0][c])

                            {

                                    theSame = false;

                                    break;

                            }

                            

                    }

                    if(theSame == true)

                {

                                    return true;

                }                    

            }

            return false;

            

    }

   

}



//sorting Characters

public class Snort  

{  

        public static void main(String[] asd)  

        {

                final int DIM = 20;

                Character[] x = new Character[DIM];

                for(int j = 0; j < DIM; j++)

                {

                        int num = (int)(26*Math.random() );

                        char letter = (char)('a' + num);

                        x[j] = letter ; //boxing

                }                

                System.out.println("before sorting");

                print(x);

                Sort2.sort(x);

                System.out.println("after sorting");

                print(x);                                            

        }

        

...

...

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