Array

20. Program

Find out sequential 3 index where difference of first two should be same as third ?

class C 
{
 public static void main(String args[])
 {
  int[] a = {4, 3, 1, 2, 0, 2, 3, 1, 2, 10};
  int x, y, z;
  for(int i = 0; i < a.length - 2; i++)
  {
   x = a[i];
   y = a[i + 1];
   z = a[i + 2];
   if((x - y) == z)
   {
    System.out.print((i));
    System.out.print((i+1));
    System.out.println((i+2) + ",");
   }
  }
 }
}  

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21. Program

(Imp_Q) Write a program which has to reverse an elements of an array ?

class E
{
 public static void main(String args[])
 {
  int[] a = {2, 4, 4, 2, 4, 7, 4, 5};
  int mid = a.length / 2;
  for(int i = 0; i < a.length; i++)
  {
   System.out.print(a[i] + " ,");
  }
  System.out.println();
  for(int i = 0; i < mid; i++)
  {
   int temp = a[i];
   a[i] = a[a.length - i - 1];
   a[a.length - i - 1] = temp;
  }
  for(int i = 0; i < a.length; i++)
  {
   System.out.print(a[i] + " ,");
  }
  System.out.println();
 }
}  

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22. Program

Write a program which has to left shift one elements in the array ? 

class F
{
 public static void main(String args[])
 {
  int[] a = {2, 4, 4, 2, 4, 7, 4, 5};
  for(int i = 0; i < a.length; i++)
  {
   System.out.print(a[i] + " ,");
  }
  System.out.println();
  for(int i = 1; i < a.length; i++)
  {
   a[i-1] = a[i];
  }
  for(int i = 0; i < a.length; i++)
  {
   System.out.print(a[i] + " ,");
  }
  System.out.println();
  
 }
}   

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