Ask the user for an array size.Then receive this number of character values. Pla

Question

Ask the user for an array size.Then receive this number of character values. Place the values within a char array, i.e. the first array.
• Now ask the user for another array size. Copy the first array to this new array. If the new size is smaller than the original, then only copy this number (i.e. the second array’s size) from the first array.
• If the new size is larger than the original,copythe whole array to the second array, and then ask the user for additional characters.
• Print both arrays.

Explanation / Answer

This is an easy task to do. You can understand this algorithm as such

1. Take as input the length of first array.

2. Take as input the elements of first array (here i have used the variable theArray for first array)

3.Take as input the length of first array.

4. Compare the two lengths.

5.Now if length of second array is less than  length of first array then copy all elements of first array into second array till the required length and leave out the rest of the elements.

6. Conversely if length of first array is less than  length of second array then copy all elements of first array into second array and ask user to enter the rest of the elements.

7. Print both arrays.

// Program starts here

import java.util.Scanner;

public class ArrayTest
{
public static void main( String argv[] )
{
Scanner keyboard = new Scanner(System.in);
System.out.print( "How large do you want the array? " );
int[] theArray = new int[keyboard.nextInt()]; // Take as input the length of first array.

// Take as input the elements of first array.
for( int i=0 ; i<theArray.length ; i++ )
{
System.out.print( "Enter value " + (i+1) + ": " );
theArray[i] = keyboard.nextInt();
}

// We Tackle the second array henceforth

Scanner keyboard2 = new Scanner(System.in);

System.out.print( "How large do you want the 2nd array? " );

int[] theArray2 = new int[keyboard2.nextInt()]; // Take as input the length of second array.

// Compare length of two arrays

if(theArray2.length<theArray.length) // If the second array is smaller

for( int i=0 ; i<theArray2.length ; i++ )
{
theArray2[i] = theArray[i]; // We copy the elements of array 1 to array 2 and leave out the rest
}

else //  // In case the second array is larger

{

for( int i=theArray.length ; i<theArray2.length ; i++ )
{
System.out.print( "Enter value " + (i+1) + ": " ); // Ask user to enter the rest of the elements
theArray[i] = keyboard.nextInt();
}

// Print the elements of first array

System.out.println ( "All the values in the array 1 are: " );

for ( int i = 0; i < theArray.length; i++ )

System.out.println (theArray[i] );

// Print the elements of second array

System.out.println ( "All the values in the array 2 are: " );

for ( int i = 0; i < theArray2.length; i++ )

System.out.println ( theArray2[i] );

}

}

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