Timing different abs implementations for Aaron

abs.c

#include <stdio.h>
#include <time.h>
#include <stdlib.h>
#include <math.h>

double absd(double n) {
  unsigned long *gg = (unsigned long int *)&n;
  *(gg) &= 0x7FFFFFFFFFFFFFFFull;
  return n;
}

int main() {
  // Random seed
  srand(0);

  double sum = 0;
  // Generate 2,000,000,000 random numbers
  for (int i = 0; i < 2000000000; ++i) {
    // sum += absd((double) (rand() - RAND_MAX) / RAND_MAX);
    sum += fabs((double) (rand() - RAND_MAX) / RAND_MAX);
  }

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