void putHeader() {
    printf("%15s", "x");
    printf("%15s", "f_fract(x)");
    printf("%15s", "f_sum(x)");
    printf("%15s", "difference");
    printf("%15s%15s\n", "N_fracts", "N_adds");
}

void putVals(double x, double f_fract, double f_sum, int N_fracts, int N_adds) {
    printf("%15lf", x);
    printf("%15lf%15lf", f_fract, f_sum);
    printf("%15lf", fabs(f_fract - f_sum));
    printf("%15d%15d\n", N_fracts, N_adds);
}