Sort a vector of struct based on a specific field

Question

Currently I am trying to sort a vector of structs based on a specific field. I have set up a custom comparison function for the use of the sort function. However, i am getti

Answer 1

a) Use sort function with lambda notation as below( if you are using c++11)

 sort(vecData.begin(),vecData.end(), [](const Play &x, const Play &y){ return (x.relevance < y.relevance);});

Working code:

http://ideone.com/bDOrBV

b) Make comparator function as static

http://ideone.com/0HsaaH