/***********************************************
* Name:       random_integers.cxx
* Author:     Leo Liberti
* Source:     GNU C++
* Purpose:    print out list of n random integers
* Build:      c++ -o random_integers random_integers.cxx
* History:    120103 work started
***********************************************/

#include<iostream> 
#include<cstdlib>
#include<cmath>
#include<cassert>
#include<sys/time.h>

const int lowerBound = 0;
const int upperBound = 10;

// return a random number between 0 and 1
double randomDouble01(void) {
  double r = ((double) random() / (double) RAND_MAX);
  return r;
}

// return a random number between lower and upper
double randomDouble(double lower, double upper) {
  assert(lower <= upper);
  double r = randomDouble01()*(upper - lower) + lower;
  return r;
}

// return a random integer between lower and upper
int randomInt(int lower, int upper) {
  double r = randomDouble((double) lower, (double) upper);
  return (int) rint(r);
}

int main(int argc, char** argv) {
  using namespace std;

  // initialize randomizer
  struct timeval theTV;
  struct timezone theTZ;
  gettimeofday(&theTV, &theTZ);
  srandom(theTV.tv_usec);

  if (argc < 2) {
    cerr << argv[0] << ": prints list of random integers" << endl;
    cerr << argv[0] << ": error: syntax is " << argv[0] << " n" << endl;
    exit(1);
  }
  int n = atoi(argv[1]);
  if (n < 1) {
    cerr << argv[0] << ": error: n must be >= 1" << endl;
    exit(2);
  }
  for(int i = 0; i < n; i++) {
    cout << randomInt(lowerBound, upperBound) << endl;
  }
  return 0; 
}