books_27_May_22

#include   <iostream>
using namespace std;




////////////////////////////////////////////////////
int main()
{
    int book = 0, price = 1000, sum = 0, i = 0;
    int count = 0;
    cout << "press enter counts book: ";
    cin >> book;

    while(i <= book)
    {
        switch (count)
        {
        case 0 : cout << i << " books = " << sum << '\n'; break;
        case 1 : price = 1000;
                 sum += price;
                 cout << i << " books = " << sum << '\n'; break;
        case 8 : price = 1000;
                 sum += price;
                 count = 1;
                 cout << i << " books = " << sum << '\n'; break;
        default: price -= 55;
                 sum += price;
                 cout << i << " books = " << sum << '\n';
        }

        count++;
        i++;
    }

    return 0;
}