c++ 在指定长度的数组或者容器中，统计元素出现的次数（count）

#include <iostream>     // cout
#include <algorithm>    // count
#include <vector>       // vector
using namespace std;
int main () {
    // counting elements in array:
    int myints[] = {,,,,,,,};   // 8 elements
    int mycount = count(myints, myints+, );
    cout << "10 appears " << mycount << " times.\n";

    // counting elements in container:
    vector<int> myvector (myints, myints+);
    mycount = count(myvector.begin()+, myvector.end(), );
    cout << "20 appears " << mycount  << " times.\n";

    return ;
}