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();
}