// File: randDemo.cpp
// Demonstrate random number seeding and generation

#include <iostream.h>
#include <stdlib.h>

// Need to include the following to use the system clock for seeding
#include <time.h>
#include <sys/timeb.h>

void main()
{int seed,numRandoms;
 cout << "Enter the random seed >";
 cout.flush();
 cin >> seed;
 srand(seed);
 cout << "How many random numbers?  >";
 cin >> numRandoms;
 for (int count=0;count<numRandoms;count++)
	 cout << count+1 << "\t:" << rand() << endl;
 
 cout << "Gosh, some (or all) of those were big!";
 cout << " How about randoms between one and 25?\n";
 cout << "Note that the same seed was used... ";
 cout << "Remove the %25 and see what numbers come up\n";
 srand(seed);
 for (count=0;count<numRandoms;count++)
	 cout << count+1 << "\t:" << rand()%25 << endl;

 cout << "Now, get a seed from the milliseconds value of the system clock:\n";
 struct _timeb timebuffer;   
 _ftime( &timebuffer );
 srand(timebuffer.millitm);
 for (count=0;count<numRandoms;count++)
	 cout << count+1 << "\t:" << rand()%25 << endl;

}