function pointer typedef

#include <iostream>
#include <cmath>

typedef double (*func)(double);

double debounce(func function, double* arr, int size) {
    for (int i = 0; i < size; ++i) {
        std::cout << function(arr[i]) << " ";
    }
}

int main() {
    int size;
    std::cin >> size;
    double* arr = new double[size];

    for (int i = 0; i < size; ++i) {
        std::cin >> arr[i];
    }

    debounce(cos, arr, size);
}