Question

Multi-Dimensional Arrays

Create main class named MultiArray.    Create a method which outputs (prints) all the values in the array. Call this method from each of the other methods to illustrate the data in the array. Note: Be sure to populate, and update the values in the multi-array, and then print the contents of the multi-array (Don't just print the design patterns.) The goal is to practice navigating the multi-array.

Declare a multi-dimensional array of integers, which is 10 rows of 10 columns ( 10 by 10).

In your code, set the initial values to ones’ such as this:

1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 1 1 1 1 1

Create a method named “patternRow.” Using control loops, (if , then / then / else ) set the data values to 1’s and 0’s, alternating by rows, such as this:

0 0 0 0 0 0 0 0 0 0

1 1 1 1 1 1 1 1 1 1

0 0 0 0 0 0 0 0 0 0

1 1 1 1 1 1 1 1 1 1

0 0 0 0 0 0 0 0 0 0

1 1 1 1 1 1 1 1 1 1

0 0 0 0 0 0 0 0 0 0

1 1 1 1 1 1 1 1 1 1

0 0 0 0 0 0 0 0 0 0

1 1 1 1 1 1 1 1 1 1

Create a method named “patternCheckered.” This method should set the values to alternative 1’s and 0’s, such as this:

0 1 0 1 0 1 0 1 0 1

1 0 1 0 1 0 1 0 1 0
0 1 0 1 0 1 0 1 0 1
1 0 1 0 1 0 1 0 1 0
0 1 0 1 0 1 0 1 0 1
1 0 1 0 1 0 1 0 1 0
0 1 0 1 0 1 0 1 0 1
1 0 1 0 1 0 1 0 1 0
0 1 0 1 0 1 0 1 0 1
1 0 1 0 1 0 1 0 1 0

Create a method named “userChoice.” Prompt the user to enter three numbers. Set the array data to be the sequence of numbers they enter, such as this:

Please enter your choice: 1

Please enter your choice: 7

Please enter your choice: 5

1 7 5 1 7 5 1 7 5 1
7 5 1 7 5 1 7 5 1 7 …

Create a method named “sumArray” which sums all the numbers together. Output totals for each row, and a grand total.

Answer 1

Copyable code:

// import required packages
import java.util.Scanner;
// define a class MultiArray
public class MultiArray
{
   // declare the global array variable and initialize the values
   public static int[][] multary= {{1,1,1,1,1,1,1,1,1,1},{1,1,1,1,1,1,1,1,1,1},{1,1,1,1,1,1,1,1,1,1},
   {1,1,1,1,1,1,1,1,1,1},{1,1,1,1,1,1,1,1,1,1},{1,1,1,1,1,1,1,1,1,1},{1,1,1,1,1,1,1,1,1,1},
   {1,1,1,1,1,1,1,1,1,1},{1,1,1,1,1,1,1,1,1,1},{1,1,1,1,1,1,1,1,1,1}};
   // main method to perfom the operations in array
   public static void main(String[] args)
   {
       System.out.println("Initial values of MultiArray:");
       // call the method and display the initial values
       showValue();
       // call the method and perform the patternRow operation
       patternRow();
       // call the method and perform the patternCheckered operation
       patternCheckered();
       // call the method and perform the userChoice operation
       userChoice();
       System.out.println("Sum of each row and Grand total:");
       // call the method and compute sum of each row and grand total
       sumArray();
   }  
  
   // method definition to display the array values
   public static void showValue()
   {
       int lp1,lp2;
       // loop to iterate the array
       for(lp1=0;lp1<10;lp1++)
       {
           for(lp2=0;lp2<10;lp2++)
           {
               // code to display the values
               System.out.print(multary[lp1][lp2]+" ");
           }
           System.out.println();
       }
   }
   // method to set the data values to 1’s and 0’s in alternative rows
   public static void patternRow()
   {
       int lp1,lp2;
       // loop to iterate the array
       for(lp1=0;lp1<10;lp1++)
       {
           for (lp2=0;lp2<10;lp2++)
           {
               // code to fil the array with 1's and 0's inalternative rows
               if(lp1%2 == 0)
               {
                   multary[lp1][lp2] = 0;
               }
           }
       }
       System.out.println("Values of MultiArray after patternRow:");
       showValue();
   }
  
   // method to set the data values alternatively 1’s and 0’s
   public static void patternCheckered()
   {
       int lp1,lp2,fill=0,fill1=0;
       //loop to iterate the array
       for(lp1=0;lp1<10;lp1++)
       {          
           // condition test to fill the array as patternCheckered
           if(multary[lp1][0]== 0)
           {
               fill=0;
               fill1=1;
           }
           // condition test to fill the array as patternCheckered
           else if(multary[lp1][0] == 1)
           {
               fill=1;
               fill1=0;
           }
           // code to fill the array as patternCheckered
           for (lp2=0;lp2<10;lp2++)
           {
               if(lp2%2 == 0)
               {
                   multary[lp1][lp2] = fill;
               }
               else
               {
                   multary[lp1][lp2] = fill1;
               }
           }
       }
       System.out.println("Values of MultiArray after patternCheckered:");
       showValue();
   }
  
   // method to get the values from user and fill it in array
   public static void userChoice()
   {
       Scanner sn = new Scanner(System.in);
       int tmp1, tmp2, tmp3,cnt=1;
       // code to get the user choice values
       System.out.println("Please enter your choice:");
       tmp1 = sn.nextInt();
       System.out.println("Please enter your choice:");
       tmp2 = sn.nextInt();
       System.out.println("Please enter your choice:");
       tmp3 = sn.nextInt();
       //loop to fill the user choice values in array
       for(int lp1=0;lp1<10;lp1++)
       {
           for(int lp2=0;lp2<10;lp2++)
           {
               // check the occurence count and fill the user choice value1
               if(cnt==1)
               {
                   multary[lp1][lp2] = tmp1;
                   cnt++;
               }
               // check the occurence count and fill the user choice value2
               else if(cnt==2)
               {
                   multary[lp1][lp2] = tmp2;
                   cnt++;
               }
               // check the occurence count and fill the user choice value3
               else if(cnt==3)
               {
                   multary[lp1][lp2] = tmp3;
                   cnt=1;
               }             
           }
       }
       System.out.println("Values of MultiArray after Userchoice:");
       showValue();
   }
  
   // method to compute sum of row and grand total
   public static void sumArray()
   {
       int grndtot = 0;
       int sumrow = 0;
       for(int lp1=0;lp1<10 ;lp1++)
       {
           for(int lp2 = 0;lp2<10 ;lp2++)
           {
               sumrow = sumrow + multary[lp1][lp2];
           }
           grndtot=grndtot+ sumrow;
           System.out.println("Sum of row " + lp1 +" is " + sumrow );
           sumrow = 0;
       }
       System.out.println("Grand total is "+grndtot);
   }
}

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