lab10

#include <iostream>
#include "vector"
using namespace std;
class IntArray
{
private:
    int k, n;
    vector<int> m_array;
    vector<int> sum;
public:
    IntArray(int n, int k){
        this->k = k;
        this->n = n;
        this->m_array.resize(n);
    }
    int operator[] (int index);
    vector<int>::iterator begin() {
        return this->sum.begin();
    };

    void set(int i, int v) {
        m_array[i] = v;
        findsum();
    }

    vector<int>::iterator end() {
        return this->sum.end();
    };

    void findsum() {
        this->sum.clear();
        for(int i = 0; i < n - k; i++) {
            int sum1 = 0;
            for (int j = i; j < i + k; j++) {
                sum1 += m_array[j];
            }
            this->sum.push_back(sum1);
        }
    }
};

int IntArray::operator[] (const int index)
{
    return m_array[index];
}

int main() {
    int n = 10, k = 2;
    IntArray array(n, k);
    //array[4] = 5;
    for(int i = 0; i < n; i++) {
        array.set(i, i);
       // cout << array[i] << " ";
    }

    for(auto i = array.begin(); i < array.end(); i++) {
        cout << *i << " ";
    }
    cout << endl;
    return 0;
}