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KWillets / divless.cpp

Created August 5, 2019 22:14

Lemire's almost divisionless random int in a range, extended with some fancy 32/64 extensible arithmetic

	#include <inttypes.h>
	#include <stdio.h>
	#include <stdlib.h>
	#include <random>

	typedef uint32_t (*randfnc32)(void);

	/*
	To generate a random integer within a range, we start
	with a random fractional number (in [0,1)) and multiply it