CODEWITHSUNDEEP
c#
Hiba
Hiba

Reputation: 251

How to get time in milliseconds?

I want to calculate the time of bubble sort algorithm in C#. But it always give 0. This is my code.

public void bubbleSort(int[] arr, ref double time)
{
     var sp = new Stopwatch();
     sp.Start();
     int temp = 0;

     for (int i = 0; i < arr.Length; i++)
     {
          for (int sort = 0; sort < arr.Length - 1; sort++)
          {
               if (arr[sort] > arr[sort + 1])
               {
                    temp = arr[sort + 1];
                    arr[sort + 1] = arr[sort];
                    arr[sort] = temp;
               }
         }  
     }
     sp.Stop();

     time = sp.Elapsed.Milliseconds*1000;
}

in main the time is always 0. What mistake i have done in this code.

Upvotes: 3

Views: 317

Answers (2)

David
David

Reputation: 10708

When you get Milliseconds, you're only getting the millisecond component of the time. Thus, 1.0501s will only be listed as 50ms, not 1050.1ms. Also, since this returns an int, you will not see fractional milliseconds, which may be the case for such a short algorythm.

Instead, use TotalMilliseconds, which will return the entire time in units of milliseconds, as well as retuning a double - which includes the fractional parts.

Upvotes: 5

Satpal
Satpal

Reputation: 133443

You need to use TotalMilliseconds property

Gets the value of the current TimeSpan structure expressed in whole and fractional milliseconds.

time = sp.Elapsed.TotalMilliseconds * 1000;

Upvotes: 3

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