public class MyPrimeTest {

    public static void main(String[] args) throws InterruptedException {
        // TODO Auto-generated method stub
        if (args.length < 3) {
            System.out.println("Usage: MyPrimeTest numThread low high \n");
            return;
        }
        int nthreads = Integer.parseInt(args[0]);
        int low = Integer.parseInt(args[1]);
        int high = Integer.parseInt(args[2]);
        Counter c = new Counter();

        //test cost of serial code
        long start = System.currentTimeMillis();
        int numPrimeSerial = SerialPrime.numSerailPrimes(low, high);
        long end = System.currentTimeMillis();
        long timeCostSer = end - start;
        System.out.println("Time cost of serial code: " + timeCostSer + " ms.");

        //test of concurrent code
        // **************************************
        // Write me here
        Thread[] list = new Thread[nthreads];
        for(int i = 0; i < nthreads; i++)
        {
            list[i] = new Thread();
        }

        long parrStart = System.currentTimeMillis();

        int step = (high - low) / nthreads;
        Thread t;

        for(int i = 0; i < nthreads; i++)
        {
            list[i] = new Thread(new ThreadPrime(low,low+step, c));
           low += step;
           list[i].start();
        }
        for(int i = 0; i < nthreads; i++)
        {
            list[i].join();
        }


        long parrEnd = System.currentTimeMillis();

         long timeCostCon = parrEnd - parrStart;

        // **************************************
        System.out.println("Time cost of parallel code: " + timeCostCon + " ms.");
        System.out.format("The speedup ration is by using concurrent programming: %5.2f. %n", (double)timeCostSer / timeCostCon);

        System.out.println("Number prime found by serial code is: " + numPrimeSerial);
        System.out.println("Number prime found by parallel code is " + c.total());
    }


}