public static void Main(String[] args)
{
const Int32 maxBound = 10000000;
// Кількість ядер на даному ПК
Int32 coresNumber = Environment.ProcessorCount;
Thread[] threads = new Thread[coresNumber - 1];
FuncInfo[] funcInfos = new FuncInfo[coresNumber];
Int32 iterationsPerThread = maxBound / coresNumber;
Int32 i, currentStartNumber;
for (i = 0, currentStartNumber = 0; i < coresNumber - 1; i++, currentStartNumber += iterationsPerThread)
{
funcInfos[i] = new FuncInfo(currentStartNumber + 1, currentStartNumber + iterationsPerThread);
threads[i] = new Thread(PrintPrimeCount);
threads[i].Start(funcInfos[i]);
}
funcInfos[i] = new FuncInfo(currentStartNumber + 1, currentStartNumber + iterationsPerThread);
PrintPrimeCount(funcInfos[i]);
for (Int32 j = 0; j < threads.Length; j++)
{
threads[j].Join();
}
Int32 result = funcInfos.Select(fi => fi.Result).Sum();
Console.WriteLine($"There are {result} prime numbers between 0..10 000 000");
Console.WriteLine("Program has finished!!!");
}
public static void PrintPrimeCount(Object obj)
{
// Кількість простих чисел на даному відрізку
Int32 count = 0;
FuncInfo funcInfo = (FuncInfo)obj;
for (Int32 currentNumber = funcInfo.StartNumber; currentNumber <= funcInfo.EndNumber; currentNumber++)
{
if (IsPrime(currentNumber))
{
count++;
}
}
Console.WriteLine(
$"There are {count} prime numbers between {funcInfo.StartNumber}..{ funcInfo.EndNumber}");
// Записуємо результат роботи потоку
funcInfo.Result = count;
}