We have discussed some of the cases of sorting vector of pairs in below set 1.
More cases are discussed in this article
Sometimes we require to sort the vector in reverse order. In those instances, rather than first sorting the vector and later using “reverse” function increases time complexity of code. Therefore, to avoid this we sort the vector in descending order directly.
Case 3 : Sorting the vector elements on the basis of first element of pairs in descending order.
For these instances, we modify the sort() function and we pass a third argument, a call to an user defined explicit function in the sort() function.
The vector before applying sort is: 5 30 20 60 10 20 40 50 The vector after applying sort is: 40 50 20 60 10 20 5 30
Case 4 : Sorting the vector elements on the basis of second element of pairs in descending order.
These instances can also be handled by modifying “sort()” function and again passing a call to user defined function.
The vector before sort operation is: 5 30 20 60 10 20 40 50 The vector after applying sort operation is: 20 60 40 50 5 30 10 20
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