Passing a parameter to a comparison function?

When using the STL sort algorithm on a vector, I want to pass in my own comparison function which also takes a parameter.

For example, ideally I want to do a local function declaration like:

int main() {
    vector<int> v(100);
    // initialize v with some random values

    int paramA = 4;

    bool comp(int i, int j) {
        // logic uses paramA in some way...
    }

    sort(v.begin(), v.end(), comp);
}

However, the compiler complains about that. When I try something like:

int main() {
    vector<int> v(100);
    // initialize v with some random values

    int paramA = 4;

    struct Local {
        static bool Compare(int i, int j) {
            // logic uses paramA in some way...
        }
    };

    sort(v.begin(), v.end(), Local::Compare);
}

The compiler still complains: "error: use of parameter from containing function"

What should I do? Should I make some global variables with a global comparison function..?

Thanks.