To search any element in array

#include<conio.h>
#include<iostream.h>
# define r 10
void main()
{ clrscr();
  int a[r];
  int w,x,y,z;
  for(int i=0;i<r;i++)
     { cin>>a[i];
     }
  cout<<"which element do you want to search ? ";
  cin>>x;
  for(i=0;i<r;i++)
     { if (x==a[i])
 { cout<<x<<" is present in the Array ";
   y=sizeof(x);
   cout<<" Size of "<<x<<" is "<<y<<"\n";
   cout<<"Index of "<<x<<" is "<<i<<"\n";

 }
    }
  getch();
}

To count no. of even and odd elements in an Array

#include<conio.h>
#include<iostream.h>
# define r 10
void main()
{ clrscr();
  int a[r];
  int b=0,c=0;
  for (int i=0;i<r;i++)
      { cin>>a[i];
if(a[i]%2==0)
 { b++;
 }
else { c++;
    }
      }
  cout<<"Number of odd elements = "<<c<<"\n";
  cout<<"Number of even elements = "<<b;
  getch();
}

To print double of each element in an Array

#include<conio.h>
#include<iostream.h>
# define r 3
void main()
{ clrscr();
  int a[r];
  for (int i=0;i<r;i++)
      { cin>>a[i];
      }
  for (i=0;i<r;i++)
      { cout<<2*a[i]<<" - ";
      }
  getch();
}

To find sum of elements of array

#include<conio.h>
#include<iostream.h>
# define R 3
void main()
{ clrscr();
  int a[R];
  int sum=0;
  for(int i=0;i<R;i++)
     { cin>>a[i];
       sum+=a[i];
     }
  cout<<"Sum = "<<sum;
  getch();
}

To print reverse of an Array

#include<iostream.h>
#include<conio.h>
# define R 5
void main()
{ clrscr();
  int a[R];
  int i;
  for(i=0;i<R;i++)
     { cin>>a[i];
     }
  for(i=R-1;i>=0;i--)
     { cout<<a[i];
     }
  getch();
}