lesson3_321

#include <iostream>

using namespace std;

int main() {
    setlocale(LC_ALL, "Russian");

    /*
    cout << "Hello\n"
         << "world";
    */

    /*
    // символ табуляции
    cout << "Names\t\t\tAges\n"
         << "Ivanov\t\t\t13\n"
         << "Kim\t\t\t15\n"
         << "VeryVeryLongName\t33";
    */

    /*
    //cout << "Русский\n";
    cout << "\n";
    cout <<"    +-----------------------+\n"
        << "    |   Продам щенков.      |\n"
        << "    | Ростов, Нансена 93    |\n"
        << "    +-----------------------+\n"
        << "    |8(22)|8(22)|8(22)|8(22)|\n"
        << "    |123  |123  |123  |123  |\n"
        << "    | 12  | 12  | 12  | 12  |\n"
        << "    +-----+-----+-----+-----+\n";
    */

    /*
    cout << R"("""\n\n\n

raw строка одинаково выглядит
в консоли и коде

\n\n"""")";

    */

    /*
    cout << "3643" << "\n";
    cout << 26566 << "\n";
    cout << 234 + 574 << "\n";
    */

    /*
    int var1;
    //var1 = 4;
    cout << "Введите число: \n";
    cin >> var1;
    cout << "var1 = " << var1 << "\n";

    int var2 = 12;
    int var3 = 9;
    unsigned int var4 = -15;
    int sum = var1 + var2 + var4;
    cout << sum << "\n";


    double x = 1.1531;
    float  y = 1.1554;

    cout << x << " " << y << "\n";

    cout << x / y + var2 << "\n";

    */

    int side_a;
    int side_b;

    cout << "Введите сторону а:";
    cin >> side_a;

    cout << "Введите сторону b:";
    cin >> side_b;

    double pi = 3.1415926;

    cout << "Периметр прямоугольника "
        << "со сторонами " << side_a
        << " и " << side_b << " равен "
        << 2 * (side_a + side_b);
}