File: optim.c

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gccintro 1.0-5
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#include <stdio.h>

double
powern (double d, unsigned n)
{
  double x = 1.0;
  unsigned j;

  for (j = 1; j <= n; j++)
    x *= d;

  return x;
}

int
main (void)
{
  double sum = 0.0;
  unsigned i;
  
  for (i = 1; i <= 100000000; i++)
    {
      sum += powern (i, i % 5);
    }

  printf ("sum = %g\n", sum);
  return 0;
}