#include "Progres.h"



Exponential::Exponential(double f, double s) {
    m_first = f;
    m_second = s;
    assert(m_first != 0);
    m_coef = m_second/m_first;
}

Exponential::Exponential() {
    m_first = 1;
    m_coef = 1;
    m_second = 1;
}

double Exponential::Sum(int n) {
    double  ans = m_first * (pow(m_coef, n) - 1) / (m_coef - 1);
    return m_coef != 1 ? ans : n * m_first;
}

double Exponential::SerJ(int j) {
    double ans = m_first*(pow(m_coef, j-1));
    return ans;
}

std::ostream& operator<< (std::ostream& out, const Exponential& exponential) {

    out << " Первый элемент прогрессии: " << exponential.m_first << "\n Отношение геометрической прогрессии: " << exponential.m_coef << "\n";
    return out;
}

Linear::Linear(double f, double s) {
    m_first = f;
    m_second = s;
    m_coef = m_second-m_first;

}

Linear::Linear() {
    m_first = 0;
    m_coef = 0;
    m_second = 0;
}

double Linear::Sum(int n) {
    return (2 * m_first + m_coef * (n - 1)) * n / 2;
}

double Linear::SerJ(int j) {
    double ans = m_first + m_coef*(j-1);
    return ans;
}


std::ostream& operator<< (std::ostream& out, const Linear& linear) {


    out << " Первый элемент прогрессии: " << linear.m_first << "\n Отношение ариметической прогрессии: " << linear.m_coef << "\n";
    return out;
}