private static void AddSubTest(LongNumber a, LongNumber b)
{// всякие тесты
Console.WriteLine("***********************");
Console.ForegroundColor = ConsoleColor.DarkRed;
Console.WriteLine("add-sub test");
Console.ForegroundColor = ConsoleColor.DarkYellow;
Console.Write("a = ");
Console.ResetColor();
Console.WriteLine(a + " ( " + a.ToDecString() + " )");
Console.ForegroundColor = ConsoleColor.DarkYellow;
Console.Write("b = ");
Console.ResetColor();
Console.WriteLine(b + " ( " + b.ToDecString() + " )");
var c = a + b;
Console.ForegroundColor = ConsoleColor.DarkYellow;
Console.Write("a + b = ");
Console.ResetColor();
Console.WriteLine(c + " ( " + c.ToDecString() + " )");
var d = a - b;
Console.ForegroundColor = ConsoleColor.DarkYellow;
Console.Write("a - b = ");
Console.ResetColor();
Console.WriteLine(d + " ( " + d.ToDecString() + " )");
a.ChandgeSing();
var k = a + b;
Console.ForegroundColor = ConsoleColor.DarkYellow;
Console.Write("-a + b = ");
Console.ResetColor();
Console.WriteLine(k + " ( " + k.ToDecString() + " )");
a.ChandgeSing();
Console.WriteLine("***********************");
}
private static void MulTest(LongNumber a, LongNumber b)
{// тесты
Console.WriteLine("***********************");
Console.ForegroundColor = ConsoleColor.DarkRed;
Console.WriteLine("Multiply test");
Console.ForegroundColor = ConsoleColor.DarkYellow;
Console.Write("a = ");
Console.ResetColor();
Console.WriteLine(a + " ( " + a.ToDecString() + " )");
Console.ForegroundColor = ConsoleColor.DarkYellow;
Console.Write("b = ");
Console.ResetColor();
Console.WriteLine(b + " ( " + b.ToDecString() + " )");
var c = a * b;
Console.ForegroundColor = ConsoleColor.DarkYellow;
Console.Write("a * b = ");
Console.ResetColor();
Console.WriteLine(c + " ( " + c.ToDecString() + " )");
var d = c / b;
Console.ForegroundColor = ConsoleColor.DarkYellow;
Console.Write("c / b = ");
Console.ResetColor();
Console.WriteLine(d + " ( " + d.First.ToDecString() + " , " + d.Second.ToDecString() + " )");
var e = c / a;
Console.ForegroundColor = ConsoleColor.DarkYellow;
Console.Write("c / a = ");
Console.ResetColor();
Console.WriteLine(e + " ( " + e.First.ToDecString() + " , " + e.Second.ToDecString() + " )");
Console.WriteLine("***********************");
}
private static void DivTest(LongNumber a, LongNumber b)
{ //тесты
Console.WriteLine("***********************");
Console.ForegroundColor = ConsoleColor.DarkRed;
Console.WriteLine("Divide test");
Console.ForegroundColor = ConsoleColor.DarkYellow;
Console.Write("a = ");
Console.ResetColor();
Console.WriteLine(a + " ( " + a.ToDecString() + " )");
Console.ForegroundColor = ConsoleColor.DarkYellow;
Console.Write("b = ");
Console.ResetColor();
Console.WriteLine(b + " ( " + b.ToDecString() + " )");
var c = a / b;
Console.ForegroundColor = ConsoleColor.DarkYellow;
Console.Write("a / b = ");
Console.ResetColor();
Console.WriteLine(c + " ( " + c.First.ToDecString() + " , " + c.Second.ToDecString() + " )");
var d = (b * c.First + c.Second);
Console.ForegroundColor = ConsoleColor.DarkYellow;
Console.Write("c * a + b = ");
Console.ResetColor();
Console.WriteLine(d + " ( " + d.ToDecString() + " )");
Console.WriteLine("***********************");
}
static void ComplexTest(LongNumber a, LongNumber b)
{// общий тест, компелексный так сказать
Console.ForegroundColor = ConsoleColor.Green;
Console.WriteLine("######### Test set #" + (++_orderNumber) + " #########");
Console.ResetColor();
var st = DateTime.Now;
var slt = DateTime.Now;
AddSubTest(a, b);
var lt = DateTime.Now - slt;
Console.ForegroundColor = ConsoleColor.Magenta;
Console.WriteLine("AddSubTest time " + lt.Seconds + " sec " + lt.Milliseconds + " msec");
Console.ResetColor();
slt = DateTime.Now;
MulTest(a, b);
lt = DateTime.Now - slt;
Console.ForegroundColor = ConsoleColor.Magenta;
Console.WriteLine("MulTest time " + lt.Seconds + " sec " + lt.Milliseconds + " msec");
Console.ResetColor();
slt = DateTime.Now;
DivTest(a, b);
lt = DateTime.Now - slt;
Console.ForegroundColor = ConsoleColor.Magenta;
Console.WriteLine("DivTest time " + lt.Seconds + " sec " + lt.Milliseconds + " msec");
Console.ResetColor();
var t = DateTime.Now - st;
Console.ForegroundColor = ConsoleColor.Red;
Console.WriteLine("Total time " + t.Seconds + " sec " + t.Milliseconds + " msec");
Console.ResetColor();
Console.WriteLine();
}
// сложение
public static LongNumber Add(LongNumber first, LongNumber second)
{
var sum = new LongNumber(first._discharges);
var isCarry = false;
for (int i = 0; i < second._discharges.Count; i++)
{
var add = sum._discharges[i] + second._discharges[i] + (isCarry ? 1 : 0);
isCarry = (add >> 8) > 0;
sum._discharges[i] = (byte)add;
}
var carryIndex = second._discharges.Count;
while (isCarry)
{
if (sum._discharges.Count > carryIndex)
{
sum._discharges[carryIndex] += 1;
if (sum._discharges[carryIndex] != 0) isCarry = false;
carryIndex++;
}
else
{
sum._discharges.Add(1);
isCarry = false;
}
}
return sum;
}
// специальное сложение для умножения. чтоб быстрее
private static void multuADD(LongNumber output, LongNumber longNumber, int index)
{
var isCarry = false;
for (int i = 0; i < longNumber._discharges.Count; i++)
{
if (output._discharges.Count == i + index) output._discharges.Add(0);
var add = output._discharges[i+index] + longNumber._discharges[i] + (isCarry ? 1 : 0);
isCarry = (add >> 8) > 0;
output._discharges[i+index] = (byte)add;
}
var carryIndex = longNumber._discharges.Count+index;
while (isCarry)
{
if (output._discharges.Count > carryIndex)
{
output._discharges[carryIndex] += 1;
if (output._discharges[carryIndex] != 0) isCarry = false;
carryIndex++;
}
else
{
output._discharges.Add(1);
isCarry = false;
}
}
}
static void Main(string[] args)
{
var a = new LongNumber(new List <byte> {
255, 1
});
var b = new LongNumber(new List <byte> {
1, 255
});
ComplexTest(a, b);
a = new LongNumber(new List <byte> {
255, 255, 255, 255
});
b = new LongNumber(new List <byte> {
1, 0, 0, 0, 1
});
ComplexTest(a, b);
a = LongNumber.FromDecString("+1000000000000000000000000000");
b = LongNumber.FromDecString("+1000000000000000000000000000");
ComplexTest(a, b);
}
// сранение 1 - первое больше, -1 первое меньше, 0 - равны
public static int AbsCompare(LongNumber first, LongNumber second)
{
if (first._discharges.Count < second._discharges.Count) return -1;
if (first._discharges.Count > second._discharges.Count) return 1;
for (int i = first._discharges.Count - 1; i >= 0; i--)
{
if (first._discharges[i] < second._discharges[i]) return -1;
if (first._discharges[i] > second._discharges[i]) return 1;
}
return 0;
}
// перегруз оператора. учтено, что иногда сложение - это вычитание (например -5+3 - это 3 - 5)
public static LongNumber operator -(LongNumber first, LongNumber second)
{
if (first.Equals(second))
second = new LongNumber(second._discharges) {_isNegative = !first._isNegative};
else
second._isNegative = ! second._isNegative;
var output = first + second;
second._isNegative = !second._isNegative;
return output;
}
// из десятичной строки
public static LongNumber FromDecString(string s)
{
var output = new LongNumber(new List<byte> { 0 });
for (int i = 1; i < s.Length; i++)
{
output *= 10;
output += new LongNumber(new List<byte> { (byte)(s[i] - '0') });
}
output._isNegative = s[0] == '-';
return output;
}
public static LongNumber Factorial(int inputValue)
{
LongNumber[] fact = new LongNumber[inputValue + 1];
fact[0] = new LongNumber("0");
fact[1] = new LongNumber("1");
fact[2] = new LongNumber("2");
LongNumber j = new LongNumber("3");
for (int i = 3; i <= inputValue - 2; i++)
{
fact[i] = fact[i - 1] * j;
}
return(fact[inputValue - 2]);
}
// умножение длинного на байт
public static LongNumber operator *(LongNumber ln, byte b)
{
var output = new LongNumber(ln._discharges);
byte carry = 0;
for (int i = 0; i < output._discharges.Count; i++)
{
int intermediate = output._discharges[i]*b;
var addCarry = ((intermediate & 255) + carry) >> 8;
output._discharges[i] = (byte) ((intermediate & 255) + carry);
carry = (byte) ((intermediate >> 8)+addCarry);
}
if (carry>0) output._discharges.Add(carry);
return output;
}
// в десятичную строку
public string ToDecString()
{
var sb = new StringBuilder();
sb.Append(Sign());
var forOut = new LongNumber(_discharges);
var ten = new LongNumber(new byte[] { 10 });
while (forOut._discharges.Count>1||forOut._discharges[0] > 9)
{
var div = forOut / ten;
forOut = div.First;
sb.Insert(1, (char)('0' + div.Second._discharges[0]));
}
sb.Insert(1, (char)('0' + forOut._discharges[0]));
return sb.ToString();
}
public static void Main()
{
LongNumber a = new LongNumber(new List <int>()
{
0, 0, 1
}, true);
LongNumber c = new LongNumber(new List <int>()
{
0, 2
}, true);
// int b = 200;
// LongNumber d = new LongNumber(new List<int>() { 0, 1 }, true);
// d += b;
LongNumber q = new LongNumber("-123");
Console.WriteLine(Factorial(10));
}
// деление (частное, остаток)
public static Cont <LongNumber,LongNumber> operator /(LongNumber first, LongNumber second)
{
var output = new LongNumber();
var residue = new LongNumber(first._discharges,first._isNegative);
if (AbsCompare(first, second) == -1)
{
output._discharges.Add(0);
return new Cont<LongNumber, LongNumber>(output, residue);
}
var discharge = residue._discharges.Count - second._discharges.Count;
for (int i = 0; i < discharge; i++) second._discharges.Insert(0,0);
for (int i = 0; i < discharge; i++)
{
if (AbsCompare(residue, second) == -1)
output._discharges.Insert(0, 0);
else
{
var cont = getDivider(residue, second);
output._discharges.Insert(0, cont.First);
residue = cont.Second;
}
second._discharges.RemoveAt(0);
}
if (AbsCompare(residue, second) == -1)
output._discharges.Insert(0, 0);
else
{
var cont = getDivider(residue, second);
output._discharges.Insert(0, cont.First);
residue = cont.Second;
}
var lastIndex = output._discharges.Count;
while (lastIndex != 0 && output._discharges[--lastIndex] == 0) ;
output._discharges.RemoveRange(lastIndex + 1, output._discharges.Count - lastIndex - 1);
output._isNegative = first._isNegative != second._isNegative;
return new Cont<LongNumber, LongNumber>(output,residue);
}
// широкую на широкую! умножаем
public static LongNumber operator *(LongNumber first, LongNumber second)
{
var output = new LongNumber();
if (AbsCompare(first, second) == -1)
{
var temp = second;
second = first;
first = temp;
}
for (int i = 0; i < second._discharges.Count; i++)
multuADD (output, first*second._discharges[i], i);
var lastIndex = output._discharges.Count;
while (lastIndex != 0 && output._discharges[--lastIndex] == 0) ;
output._discharges.RemoveRange(lastIndex + 1, output._discharges.Count - lastIndex - 1);
output._isNegative = first._isNegative != second._isNegative;
return output;
}
// подбор очередного байта частного методом дихотомии. (гуглить "окулов длинная арифметика")
private static Cont<Byte,LongNumber> getDivider(LongNumber residue, LongNumber second)
{
var down = 0;
var up = 256;
while (down + 1 < up)
{
var newValue = second*(byte) ((down + up)/2);
if (AbsCompare(residue, newValue) == -1)
{
up = (down + up) / 2;
}
else
{
down = (down + up) / 2;
}
}
var residueOut = Subtract(residue, second * (byte)down);
residueOut._isNegative = residue._isNegative;
return new Cont<Byte,LongNumber>((byte)down, residueOut);
}
// вычитание
public static LongNumber Subtract(LongNumber first, LongNumber second)
{
var sum = new LongNumber(first._discharges);
var isCarry = false;
for (int i = 0; i < second._discharges.Count; i++)
{
var isCarryNext = sum._discharges[i] < second._discharges[i] ;
sum._discharges[i] -= (byte)(second._discharges[i] + (isCarry ? 1 : 0));
isCarry = isCarryNext;
}
var carryIndex = second._discharges.Count;
while (isCarry)
{
if (sum._discharges[carryIndex] != 0) isCarry = false;
sum._discharges[carryIndex] -= 1;
carryIndex++;
}
var lastIndex = sum._discharges.Count;
while (lastIndex !=0 && sum._discharges[--lastIndex] == 0);
sum._discharges.RemoveRange(lastIndex + 1, sum._discharges.Count-lastIndex-1);
return sum;
}
public LongNumber(LongNumber ln)
{
_discharges = ln._discharges;
}