/*
 * main.cpp
 *
 *  Created on: 8 авг. 2021 г.
 *      Author: alexander
 */
#include <iostream>
#include <iomanip>

using namespace std;

void floatType();
void boolType();

int main()
{
	// Размер типов данных
	cout << "bool:\t\t" << sizeof(bool) << " bytes" << endl;
	cout << "char:\t\t" << sizeof(char) << " bytes" << endl;
	cout << "wchar_t:\t" << sizeof(wchar_t) << " bytes" << endl;
	cout << "char16_t:\t" << sizeof(char16_t) << " bytes" << endl;
	cout << "char32_t:\t" << sizeof(char32_t) << " bytes" << endl;
	cout << "short:\t\t" << sizeof(short) << " bytes" << endl;
	cout << "int:\t\t" << sizeof(int) << " bytes" << endl;
	cout << "long:\t\t" << sizeof(long) << " bytes" << endl;
	cout << "long long:\t" << sizeof(long long) << " bytes" << endl;
	cout << "float:\t\t" << sizeof(float) << " bytes" << endl;
	cout << "double:\t\t" << sizeof(double) << " bytes" << endl;
	cout << "long double:\t" << sizeof(long double) << " bytes" << endl;

	floatType();
	boolType();

	return 0;
}

void floatType()
{


	// Запись числа
	int n(5);
	double d(5.0);
	float f(5.0f);

	cout << "n:\t" << n << endl;
	cout << "d:\t" << d << endl;
	cout << "f:\t" << f << endl;

	// Экспоненциальная запись чисел
	{
		double d1(5000.0);
		double d2(5e3);
		double d3(0.05);
		double d4(5e-2);

		cout << "d1:\t" << d1 << endl;   // 5000
		cout << "d2:\t" << d2 << endl;   // 5000
		cout << "d3:\t" << d3 << endl;   // 0.05
		cout << "d4:\t" << d4 << endl;   // 0.05
	}

	// Тест
	{
		double d1(3.450e1);
		double d2(4.000e-3);
		double d3(1.23005e2);
		double d4(1.46e5);
		double d5(1.46000001e5);
		double d6(8e-10);
		double d7(3.45000e4);

		cout << "d1:\t" << setprecision(4) << d1 << endl;   // 34.50
		cout << "d2:\t" << setprecision(4) << d2 << endl;   // 0.004000
		cout << "d3:\t" << setprecision(6) << d3 << endl;   // 123.005
		cout << "d4:\t" << setprecision(3) << d4 << endl;   // 146000
		cout << "d5:\t" << setprecision(9) << d5 << endl;   // 146000.001
		cout << "d6:\t" << setprecision(1) << d6 << endl;   // 0.0000000008
		cout << "d7:\t" << setprecision(6) << d7 << endl;   // 34500.0
	}
}

void boolType()
{
	bool b1 = true;   // копирующая инициализация
	bool b2(false);   // прямая инициализация
	bool b3{true};    // uniform-инициализация (C++11)
	bool b4 = false;  // операция присваивания

	cout << b1 << endl;
	cout << b2 << endl;
	cout << b3 << endl;
	cout << b4 << endl;
}