How to Sort a List of Custom Structs in Descending Order Using STL's Sort Function?

Sorting a List Using STL's Sort Function: Overcoming Compilation Errors

In attempting to sort a list containing instances of a custom struct in descending order, you encountered a compilation error revolving around the non-availability of the '-' operator for the 'Result' list. This error stems from the mismatch between the sort function's requirement for random access iterators and the bidirectional iterators returned by std::list::begin() and std::list::end().

To resolve this issue, it's advisable to employ the std::list::sort member function, which is tailored to work with bidirectional iterators. This function takes the same arguments as std::sort and internally employs a sorting algorithm optimized for lists.

Here's an illustration of how to utilize the std::list::sort function for your specific scenario:

Result.poly.sort([](const term& t1, const term& t2) {
    return t2.pow < t1.pow;
});

With this adjustment, the compilation error will be resolved, and your code will sort the 'poly' list in descending order based on the 'pow' member of its constituent 'term' elements.

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