// random.cpp - simple example of setting random number seeds with time

#include <iostream>
using namespace std;

double rnd(double a, double b) {
	return ((double)rand() / RAND_MAX) * (b - a) + a;	//	return random number from [a, b)
}

int main() {
	srand(time(nullptr));	//	use time in seconds to set seed

	cout << "5 int random numbers from [0, RAND_MAX]:" << endl;
	for (int i = 0; i < 5; ++i) cout << rand() << " "; 
	cout << endl;
	cout << endl;

	cout << "5 int random numbers from [0, 100):" << endl;
	for (int i = 0; i < 5; ++i) cout << rand() % 100 << " "; 
	cout << endl;
	cout << endl;

	cout << "5 double random numbers from [0, 1):" << endl;
	for (int i = 0; i < 5; ++i) cout << rnd(0., 1.) << " "; 
	cout << endl;
	cout << endl;

	cout << "5 double random numbers from [-10, 10):" << endl;
	for (int i = 0; i < 5; ++i) cout << rnd(-10., 10.) << " "; 
	cout << endl;
	cout << endl;

	return 0;
}