lesson8

#include <iostream>
#include <stdlib.h>
#include <time.h>

using namespace std;

void zabor() {
    const int K = 10;
    const int N = 12;
    int k = 0, n = 0;
    std::cout << std::endl;
    while (n < N) {
        k = 0;
        while (k < K) {
            std::cout << "#";
            k++;
        }
        std::cout << std::endl;
        n++;
    }

    std::cout << std::endl;
}

void showNums() {
    const int beg = 0;
    const int fin = 25;
    int k = beg;
    int r;
    srand(time(0)); // LC_ALL
    while (k <= fin) {
        std::cout << k++ << " "
            << (rand() % 21) - 10 << "\n";
    }
    std::cout << std::endl;
}

void summatorWhile() {
    int val, k = 0, summ = 0;
    cout << "Imput numbers (enter 0 for finish)" << endl;
    cin >> val;
    summ += val;
    k++;
    while (val != 0) {
        cin >> val;
        summ += val;
        k++;
    }
    cout << "num: " << --k << ", summ: " << summ << endl;
}

void summatorDoWhile() {
    int val, k = 0, summ = 0;
    cout << "Imput numbers (enter 0 for finish)" << endl;
    do {
        cin >> val;
        summ += val;
        k++;
    } while (val != 0);
    cout << "num: " << --k << ", summ: " << summ << endl;
}

void calcDivNonZero() {
    int a, b, count = 0;
    const int maxCount = 3;
    double res;
    cout << "Enter a: ";
    cin >> a;
    if (a == 0)
        cout << "res: " << 0;
    else {
        do {
            cout << "Enter b: ";
            cin >> b;
            count++;
            if (count > maxCount-1) {
                cout << "Error, you enter 0 value "
                    << maxCount << " times." << endl;
                return;
            }
        } while (b == 0);
        res = double(a) / b;
        cout << "res: " << res;
    }
}

void convertCarency() {
    const double rub_usd = 58.15;
    const double rub_eur = 59.05;
    const double rub_cny = 8.8;

    cout << "Enter input curency: " << endl;
    cout << "1 - usd" << endl;
    cout << "2 - eur" << endl;
    cout << "3 - cny" << endl;
    cout << "4 - rub" << endl;

    enum Curency { usd = 1, eur = 2, cny = 3, rub = 4 };
    Curency input, output;
    int tmp;
    cin >> tmp;
    input = (Curency)tmp;

    cout << "Enter output curency: " << endl;
    cin >> tmp;
    output = (Curency)tmp;

    double deposite, deposite_rub, deposite_output;
    cout << "Enter deposite: " << endl;
    cin >> deposite;

    switch (input)
    {
    case usd:
        deposite_rub = deposite * rub_usd;
        cout << "You have << " << deposite << "USD" << endl;
        break;
    case eur:
        deposite_rub = deposite * rub_eur;
        cout << "You have << " << deposite << "EUR" << endl;
        break;
    case cny:
        deposite_rub = deposite * rub_cny;
        cout << "You have << " << deposite << "CNY" << endl;
        break;
    case rub:
        deposite_rub = deposite;
        cout << "You have << " << deposite << "RUB" << endl;
        break;
    default:
        cout << "ERROR" << endl;
        return;
    }

    switch (output)
    {
    case usd:
        deposite_output = deposite_rub / rub_usd;
        cout << "You can get << " << deposite_output << "USD" << endl;
        break;
    case eur:
        deposite_output = deposite_rub / rub_eur;
        cout << "You can get << " << deposite_output << "EUR" << endl;
        break;
    case cny:
        deposite_output = deposite_rub / rub_cny;
        cout << "You can get << " << deposite_output << "CNY" << endl;
        break;
    case rub:
        deposite_output = deposite_rub;
        cout << "You can get << " << deposite_output << "RUB" << endl;
        break;
    default:
        cout << "ERROR" << endl;
        return;
    }
}

void convertMenu() {
    char ch;
    do {
        convertCarency();
        cout << "Enter \"N\" or \"n\" for exit: ";
        cin >> ch;
    } while (!(ch == 'n' || ch == 'N'));
}

void romb() {
    const int h = 10;
    const int w = 7;
    for (int k = 0; k < h; k++) {
        for (int n = 0; n < w; n++) {
            if (n < k)
                cout << ' ';
            else
                cout << '*';
            if(n < k )
                cout << '*';
            else
                cout << ' ';
        }
        cout << endl;
    }
}

int main(){
    //zabor();
    //showNums();
    //summatorWhile();
    //summatorDoWhile();
    //calcDivNonZero();
    //convertMenu();
    romb();
}