#include <iostream.h>

// sumVecRecur
// A function to add the first "size" entries
// of the vector "data".
//
double sumVecRecur( double data[], int size ) {
  if (size == 0)
    return 0.0;
  else
    return (data[ size-1 ] + sumVecRecur( data, size-1 ));
  }

 /* The above is recursive, but not tail-recursive.
  * Exercise: convert it!
  */
    


int main() {
  const int N = 30;
  double myVec[ N ];

  cout << "The sum of entries 0 through " << N-1 << " is "
       << sumVec( myVec, N ) << ".\n";
  }