2.1.2

#include <iostream>
#include "math.h"
#include <iomanip>
using namespace std;

int main()
{
    double a;
    int n;
    int k;
    cout << "Enter number="; cin >> a;
    cout << "Enter n="; cin >> n;
    cout << "Enter k="; cin >> k;
    for (int i = 0; i < n; i++)
    {
        a *= 10;
    }
    int b;
    b = a;
    a -= b;
    int S = 0;
    for (int i = 0; i < k; i++)
    {
        int c;
        c = a * 10;
        S += c;
        a *= 10;
        a -= c;
    }
    cout << endl << "Answer:" << S << endl;
    system("pause");
    return 0;
}