//
// Example 6.13. Program to print random integers in the range
// 0 - (upperBound - 1) with seed based on time
//

#include <iostream>
#include <iomanip>
#include <cstdlib>
#include <ctime>

using namespace std;

int main()
{
   void seedRand();
   int randomInt(int upperBound);

   const int HIGH = 100;
   int i = 0;

   seedRand();

   cout << "Random integers between 0 and "
        << HIGH - 1 << ",	inclusively:" << endl;
   while (i < 10)
   {
	       cout << setw(5) << randomInt(HIGH);
	++i;
   }

   return 0;
}

//
// Function to seed the random number generator
// Pre:  none
// Post: The random number generator has been seeded.
//

void seedRand()
{
   srand( static_cast<unsigned>(time((time_t *)NULL)) );
}

//
// Function to generate a random integer between
// 0 and upperBound - 1
// Pre:  upperBound is a positive integer. The generator is seeded.
// Post: A random integer between 0 and upperBound - 1
//       has been returned.
//

int randomInt(int upperBound)
{
   double random_0_1;   // random number between 0 and 1

   random_0_1 = rand() / (static_cast<double>(RAND_MAX) + 1);
   return static_cast<int>(upperBound * random_0_1);
}