Programming of SUM OF CUBES OF THE SERIES 13+23+33+---------+n3 in c language

void main()

{

  int r;

  clrscr();

  printf("\nEnter the number range: ");

  scanf("%d",&r);

  printf("\nSum of the cubes of the series is: %d",(r*(r+1)/2)*(r*(r+1)/2));

  getch();

}