generate lookup table for powers of 1.414, i.e. sqrt(2)

exponent.c

// Ralph Doncaster 2020 public domain software
// generate lookup table for powers of sqrt(2)
#include <stdio.h>
#include <math.h>

int main()
{
    double sqrt2 = sqrt(2.0);
    for (double d = 2; d <= 16; d += 1) {
        printf( "1.414^%d = %lf\n", (int)d, pow(sqrt2, d) );
    }
    printf("powers[] = { 0");
    for (double d = 2; d <= 16; d += 1) {
        printf( ", %d", (int) (pow(sqrt2, d) + 0.5) );
    }
    printf(" };\n");
}