# include <cstdlib>
# include <iostream>
# include <ctime>

using namespace std;

int main ( int argc, char *argv[] );
double cpu_time ( void );

//****************************************************************************80

int main ( int argc, char *argv[] )

//****************************************************************************80
//
//  Purpose:
//
//    MAIN is the main program for SUM_MILLION.
//
//  Discussion:
//
//    SUM_MILLION is a sketch of a program to generate the numbers
//    from 1 to 1,000,000, add them, and print the result.
//
//    This program is only a sketch.  Your job is to finish it,
//    debug it, and get it to run.
//
{
# define N 1000000

  double ctime;
  double ctime1;
  double ctime2;
  double error;
  double exact = 500000500000.0;
  int flops;
  int i;
  double mflops;
  double total;
  double x[N];

  cout << "\n";
  cout << "SUM_MILLION:\n";
  cout << "  C++ version.\n";
  cout << "\n";
  cout << "  Task: Add the numbers from 1 to " << N << "\n";
//
//  Step 1:
//  Load the array X with the values.
//
  for ( i = 0; i < N; i++ )
  {
    x[i] = i + 1;
  }
//
//  Step 2:
//  Start the clock.
//  Add up the entries in X.
//  Stop the clock.
//  Compute elapsed CPU time;
//  Set the number of FLOPs.
//  Compute the MFLOPS rate.
//  Compute the error.
//
  MISSING CODE
//
//  Step 3:
//  Print results;
//
  cout << "\n";
  cout << "  Total =    " << total << "\n";
  cout << "  Error =    " << error << "\n";
  cout << "  CPU time = " << ctime << "\n";
  cout << "  MFLOPS =   " << mflops << "\n";

  return 0;
# undef N
}
//****************************************************************************80

double cpu_time ( void )

//****************************************************************************80
//
//  Purpose:
// 
//    CPU_TIME reports the elapsed CPU time.
//
//  Modified:
//
//    27 September 2005
//
//  Author:
//
//    John Burkardt
//
//  Parameters:
//
//    Output, double CPU_TIME, the current total elapsed CPU time in second.
//
{
  double value;

  value = ( double ) clock ( ) / ( double ) CLOCKS_PER_SEC;

  return value;
}