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The debugging example below is used for five odd numbers to be sorted. This is the easiest way to figured out how the threads work together with the simple data.
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<td width="400500">*How to start debugging
The following sequence may guides you start to debug on the visual Studio.
# put breakpoints where you want to take a look by hitting the key F9 in the line or left-click at the front of a line
## F9 to put/remove breakpoints in a line
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<td width="600500">(To open windows you need for debugging on Visual Studio, You must run a program in debug mode first). Otherwise, there is no menu to open the windows.
[[File:debug_windows.png|400px|thumb|left|Menu Debug > Windows on VS 2015]]
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<tr align="left"><td>[[File:dataflow.png|220px|thumb|left|Quick sorting dataflow]]</td>
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Fist set of this quick sorting is that main thread worked for first half of all elements which starts *begin 9 to *end 1. The *mid value was 9 so it swapped *mid for *end. Since mid moved to end, the second half of all elements was the end to the end which only end value are to be sorted; the actual process will be skipped so no value is changed.