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SqrtTests.cs
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SqrtTests.cs
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using System;
using System.Diagnostics;
namespace Sqrt {
class Program {
static void Main(string[] args) {
Stopwatch time1 = new Stopwatch();
Stopwatch time2 = new Stopwatch();
Stopwatch time3 = new Stopwatch();
double tmp;
Console.WriteLine("Оригинальный sqrt: ");
time1.Start();
for (int i = 0; i < 10000000; i++) {
tmp = Math.Sqrt(i);
}
time1.Stop();
Console.WriteLine($"Time: {time1.ElapsedMilliseconds} ms; {time1.ElapsedTicks} ticks\n");
Console.WriteLine("Древняя магия Вавилона: ");
time2.Start();
for (int i = 0; i < 10000000; i++) {
tmp = sqrtBabylon(i);
}
time2.Stop();
Console.WriteLine($"Time: {time2.ElapsedMilliseconds} ms; {time2.ElapsedTicks} ticks\n");
Console.WriteLine("Через экспоненту: ");
time3.Start();
for (int i = 0; i < 10000000; i++) {
tmp = sqrtExp(i);
}
time3.Stop();
Console.WriteLine($"Time: {time3.ElapsedMilliseconds} ms; {time3.ElapsedTicks} ticks");
Console.ReadLine();
}
private static double sqrtBabylon(double num) {
double result = 1;
for (int i = 0; i < 9; i++) {
result = (result + num / result) * 0.5;
}
return result;
}
private static double sqrtExp(double num) {
return Math.Exp(Math.Log(num) * 0.5);
}
}
}