inline S
generalized_mean(I first, I last, T p) {
// Check for well known cases.
if (p == -1)
return harmonic_mean(first, last);
if (p == 0)
return geometric_mean(first, last);
if (p == 1)
return arithmetic_mean(first, last);
if (p == 2)
return quadratic_mean(first, last);
if (p == 3)
return cubic_mean(first, last);
// Either handle the infinity case or compute the generalized
// value.
if (is_infinity(p))
return generalized_mean_inf(first, last, p);
else
return generalized_mean_non_inf(first, last, p);
}
int main(void)
{
char ch;
int status;
double i, j;
while(printf("Enter two non-zero integers (q to quit): "),
status = scanf("%lf %lf", &i, &j),
(ch = getchar()) != 'q')
{
if (ch != '\n')
{
if (status == 2)
{
printf("Too many inputs.\n");
} else
{
printf("Invalid input.\n");
}
while (getchar() != '\n');
continue;
}
if ((i == 0) || (j == 0))
{
printf("Numbers cannot be zero.\n");
continue;
}
printf("The harmonic mean of %g and %g is %g\n",
i, j, harmonic_mean(i, j));
}
printf("Bye!\n");
return 0;
}
