Answer
Change the variable name of currentMin to currentMax and currentMinIndex to currentMaxIndex at all places. Also change the > sign to < sign in 9th line. Now the function will sort in decreasing order.
Work Step by Step
For sorting in decreasing order, instead of finding the minimum element and then putting that in front we need to find the maximum element and put that in front. We can do this by changing the function as mentioned above.
