Chapter 6, Problem 29RE

Explanation of Solution

Consider the given array declaration:

int[][] values = new int[ROWS][COLUMNS];

Fill all entries with “0”:

Java statements to fill all entries with “0” are as follows:

//Outer loop to refer rows of the array

for(int x = 0; x < ROWS; x++)

{

    //Inner loop to refer columns of the array

    for(int y = 0; y < COLUMNS; y++)

    {

        //Fill the array “values” with “0”

        values[x][y] = 0;

  }

}

Explanation:

In the above code,

• The outer “for” loop is used to refer the rows of the “values” array.
  • The inner “for” loop is used to refer the columns of the “values” array.
    • The statement “values[x][y] = 0;” is used to fill each element of the “values” array with “0”.

Fill elements alternately with 0s and 1s in a checkerboard pattern:

Java statements to fill elements alternately with 0s and 1s in a checkerboard pattern are as follows:

//Outer loop to refer rows of the array

for(int x = 0; x < ROWS; x++)

{

    //Inner loop to refer columns of the array

    for(int y = 0; y < COLUMNS; y++)

    {

        //Fill the array “values” with “0”

        values[x][y] = (x + y) % 2;

  }

}

Explanation:

In the above code,

• The outer “for” loop is used to refer the rows of the “values” array.
  • The inner “for” loop is used to refer the columns of the “values” array.
    • The statement “values[x][y] = (x + y) % 2;” is used to fill elements of “values” array alternately with 0s and 1s in a checkerboard pattern.

Fill only the elements at the top and bottom row with zeroes:

Java statements to fill only the elements at the top and bottom row with zeros are as follows:

//Outer loop to refer rows of the array

for(int y = 0; y < columns; y++)

{

    //Assign top row with zeros

    values[0][y] = 0;

    //Assign bottom row with zeros

  values[ROWS - 1][y] = 0;

}

Explanation:

In the above code,

• The “for” loop is used to refer the columns of the array...