Количество элементов массива, равных 0

#include <iostream>
#include <vector>
#include <algorithm>
#include <iterator>
#include <numeric>
#include <cmath>
 
struct ModCmp {
    bool operator () (double a, double b){
        return fabs(a) < fabs(b);
    }
};
 
int main(){
    int size;
    std::cout << "Number of elements: ";
    std::cin >> size;
    std::vector<double> arr(size);
 
    for ( int i = 0; i < size; ++i ){
        std::cout << "Array[" << i << "] = ";
        std::cin >> arr[i];
    }
 
    std::cout << std::count(arr.begin(), arr.end(), 0.0) << " zero elements" << std::endl;
    std::vector<double>::iterator i = std::min_element(arr.begin(), arr.end());
    std::cout << "Sum of elements after min value: "
            << std::accumulate(++i, arr.end(), 0.0) << std::endl;
    std::cout << "Sorted by modules ascendant:" << std::endl;
    std::sort(arr.begin(), arr.end(), ModCmp());
    std::copy(arr.begin(), arr.end(), std::ostream_iterator<double>(std::cout, " "));
    std::cout << std::endl;
 
    return 0;
}