I am trying to reverse an array at certain indexes eg:Example: Array = [ 1,2,3,4

ID: 3693695 • Letter: I

Question

I am trying to reverse an array at certain indexes eg:Example: Array = [ 1,2,3,4,5,6,7,8 ] * reverse(3,6) results in * Array = [ 1,2,3,7,6,5,4,8 ] Below are the methods i already have. But there is something wrong with my reverse method. Can someone please adjust it so it will work for an example like above?

public boolean reverse(int start, int end)

for (int i = start; i < start + (start + end)/2; i++){ swap (i , end - i); }

return true; }

public boolean swap(int index1, int index2)

int temp = myArray[index1]; myArray[index1] = myArray[index2]; myArray[index2] = temp; return true; }

Explanation / Answer

Answer:

Hi, I have modified your code. It is working fine now. I have commented out the for loop which is not needed for your requirement. Please note that in sample output you mentioned line 1,2,3,7,6,5,4,8 but it should be 1,2, 3, 7, 5, 6, 4, 8

public boolean reverse(int start, int end) {
   //for (int i = start; i < start + (start + end)/2; i++){
       swap (start , end);
   //   }

   return true;
   }

    public boolean swap(int index1, int index2){
    int temp = myArray[index1];
   myArray[index1] =   myArray[index2];
   myArray[index2] = temp;
   return true;
   }

----------------------------------------------------------------------------------

Please find the below test program for above swap functionality

TestTest.java

public class TestTest {

   /**
   * @param args
   */
   static int myArray[] ={1,2,3,4,5,6,7,8};
   public static void main(String[] args) {

       reverse(3, 6);
       for(int i=0; i<myArray.length; i++){
           System.out.print(myArray[i] +" ");
       }
   }
   public static boolean reverse(int start, int end) {
   //for (int i = start; i < start + (start + end)/2; i++){
       swap (start , end);
   //   }

   return true;
   }

   public static boolean swap(int index1, int index2){
   int temp = myArray[index1];
   myArray[index1] =   myArray[index2];
   myArray[index2] = temp;
   return true;
   }
}

Output:

1 2 3 7 5 6 4 8

Navigate

I am trying to return the previous day from an entered day like Monday. This kee

I am trying to reverse this array by copying it to a new array andmy prof told m

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.

I am trying to reverse an array at certain indexes eg:Example: Array = [ 1,2,3,4

Question

Explanation / Answer

Related Questions

Navigate