#include <iostream>
#include <stdlib.h>
 
unsigned throw_dice_mod6()
{
    return rand() % 6;
}
 
unsigned throw_dice_fred()
{
	static const unsigned divisor = static_cast<unsigned>((RAND_MAX + 1.0) / 6);
	static const unsigned safe_bound = divisor * 6;
	unsigned x;
	do x = rand(); while (x >= safe_bound);
	return x / divisor;
}
 
void test(const char* description, unsigned throw_function())
{
	std::cout << description << '\n';
	int count[6] = {0};
	for (int i = 0; i < 60000; ++i)
	{
		++count[throw_function()];
	}
	for (int i = 0; i < 6; ++i)
	{
		std::cout << (i + 1) << ": " << count[i] << '\n';
	}
}
 
int main()
{
	test("mod6", throw_dice_mod6);
	test("fred", throw_dice_fred);
}
 

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