#include <Core/Core.h>

using namespace Upp;

int putBetween(const int x1, const int x2, const int x3)
{
	int copie_x1 = x1;
	int copie_x2 = x2;
	
	
		
	// Put x3 between x1 et x2
	
	int d1 = x3 - copie_x1;
	int d2 = x3 - copie_x2;
	
	if(copie_x2 < copie_x1)
	{
		int tmp = copie_x2;
		
		copie_x2 = copie_x1;
		copie_x1 = tmp;
	}
	
	if(x3 >= copie_x1 && x3 <= copie_x2) return x3;
	
	if(d1 == 0) d1 = (copie_x2-copie_x1)/2;
		
	double rapport =  100*cos(d1+d2)*(copie_x2-copie_x1);
	if(rapport < 0) rapport *= -1;
	
	double dnewx3 = (100*copie_x1 + rapport)/100;
	int newx3 = (int) round(dnewx3);
	
	return newx3;
}

int c_rand_a_b(int x1, int x2)
{			
	
	// Using standard C function rand()
	
	if(x1 == x2)
		return x1;
				
	int x3 = rand();
	
	int newx3 = putBetween(x1, x2, x3);
	
	return newx3;
}


int upp_rand_a_b(int x1, int x2)
{			
	
	// Using U++ function Random()
	
	if(x1 == x2)
		return x1;
	
	String s3;
		
	dword dw3 = Random();
	s3 << dw3;
	
	int x3 = StrInt(s3);
	
	int newx3 = putBetween(x1, x2, x3);
	
	return newx3;
}

		
CONSOLE_APP_MAIN
{
	Cout() << "Random function proposal"; Cout().PutEol();
	
	int a, b;
	String sa, sb;
	
	do
	{
		Cout().PutEol();
		Cout() << "Enter a number named \"a\":";
	
		sa = ReadStdIn();	
		
		a = StrInt(sa);	
	}
	while(a<0);
	
	do
	{
		Cout().PutEol();
		Cout() << "Enter another number different of " << a << " named \"b\":";
	
		sb = ReadStdIn();
		
		b = StrInt(sb);		
	}
	while(b<0 || b==a);
	
	Cout().PutEol();
	Cout() << "--------------------------";
	
/// Proposal 1: c_rand_a_b(a,b)
	
			// To use c_rand_a_b correctly, you might reset srand each time you reexecute the program
			// Otherwise you get the same sequential data 
			
			Time t = GetSysTime();		
			srand((unsigned int) t.second*1000);
	
	Cout().PutEol();
	Cout() << "Using standard C rand() function : c_rand_a_b(" << a << ", " << b << ") ";
	Cout().PutEol();
	for(int i=0;  i<10; i++)
	{		
		Cout() << c_rand_a_b(a, b) << " ";
	}
	
/// Proposal 2: upp_rand_a_b(a,b)
	
	Cout().PutEol();
	Cout() << "Using U++ Random() function : upp_rand_a_b(" << a << ", " << b << ")";
	Cout().PutEol();
	for(int i=0;  i<10; i++)
	{
		Cout() << upp_rand_a_b(a, b) << " ";
	}
	
	Cout().PutEol();
}

int min=10;
int max=1000;
int rand = int(Random(max-min)+min); // you don't have to care about the range here as long as max < INT_MAX

#include <Core/Core.h>

using namespace Upp;

// Returns Random from a to b, inclusively.
dword Random(dword a, dword b)
{
	if (a == b)
		return a;
	if (a < b)
		return a + Random(b - a + 1);
	return b + Random(a - b + 1);
}

CONSOLE_APP_MAIN
{
	const int n = 100;
	for (int i = 1, j = n; i <= n; ++i, --j)
		Cout() << Format("%3d, %3d: %s\n", i, j, AsString(Random(i, j)));
}

// Returns random value from 0 to 1 - 10^-9 with 10^-9 precision.
double Randomf()
{
	static const dword n = 1000000000;
	return double(Random(n)) / n;
}

qword Random64()
{
	return MAKEQWORD(Random(), Random());
}

qword Random64(qword n)
{
	qword mask = n, r;
	mask |= mask >> 1;	mask |= mask >> 2;
	mask |= mask >> 4;	mask |= mask >> 8;
	mask |= mask >> 16;	mask |= mask >> 32;

	do
		r = Random64() & mask;
	while(r >= n);
	return r;
}

qword Random64(qword a, qword b)
{
	if (a == b)
		return a;
	if (a < b)
		return a + Random64(b - a + 1);
	return b + Random64(a - b + 1);
}

void SeedRandom(dword *seed,int len){
	if(!sRng) {
		sRng = new(sRb) MTrand;
	}
	sRng->init_by_array(seed,len);
}

void SeedRandom(dword Seed){
	if(!sRng) {
		sRng = new(sRb) MTrand;
	}
	sRng->init_genrand(Seed);
}