Random number in c++
This is really more of a reminder for myself... how to draw random numbers fast in c/c++. (download [random.cpp]) and compile like so: g++ -O2 -o random random.cpp
#include ‹iostream›
#include ‹cmath›
#include ‹fstream›
#include ‹cstdlib›
using namespace std;
#define PI M_PI
#define RAD PI/180.0
#define SIG5 5.0*sig
#define SIG10 10.0*sig
#define SIG20 20.0*sig
unsigned long long int rdtsc();
int main (int argc, char* argv[]) //take in commandline arguements
{
int ii = 0;
srandom(rdtsc());
while (ii ‹ 100)
{
cout ‹‹ rand(); //RAND_MAX;
cout ‹‹ "\t";
cout ‹‹RAND_MAX;
cout ‹‹ "\n";
ii +=1;
}return 0;
}
unsigned long long int rdtsc(void) //Call a Random number.
{
unsigned long long int x;
unsigned a, d;__asm__ volatile("rdtsc" : "=a" (a), "=d" (d));
return ((unsigned long long)a) | (((unsigned long long)d) ‹‹ 32);;
}
). There was something more to it and I loved the parallels with the US/Mexico border issues now.. but add some real aliens in there, not just the illegal kind. 
