Added complex, submodule for him, operators

.gitignore

+.vs/
+out/
+.DS_Store
+.idea/
+cmake-build-debug/
+cmake-build-release/
+build/
\ No newline at end of file

.gitmodules

+[submodule "labb"]
+	path = labb
+	url = https://git.miem.hse.ru/lalalalaba/labb.git

CMakeLists.txt

+cmake_minimum_required(VERSION 3.10)
+
+set(CMAKE_CXX_STANDARD 17)
+
+project(111)
+
+add_executable("source/complex.cpp")
+
+add_subdirectory(labb)
+
+target_link_libraries(111 PUBLIC linalg)

labb @ 598d2ec8

+Subproject commit 598d2ec8b07b910384b538b70802aa8f2f95edb9

source/complex.cpp

+#include "complex.h"
+#include <sstream>
+#include <iomanip>
+Complex& Complex::operator+=(const Complex& other) noexcept {
+	m_re += other.m_re;
+	m_im += other.m_im;
+	return *this;
+}
+Complex operator+ (const Complex& v1, const Complex& v2) {
+	Complex tmp(v1);
+	return tmp += v2;
+}
+Complex& Complex::operator-=(const Complex& other) noexcept {
+	m_re -= other.m_re;
+	m_im -= other.m_im;
+	return *this;
+}
+Complex operator-(const Complex& v1, const Complex& v2) {
+	Complex tmp(v1);
+	return tmp -= v2;
+}
+Complex& Complex::operator*=(const Complex& other) noexcept {
+	double new_re = m_re * other.m_re - m_im * other.m_im;
+	double new_im = m_re * other.m_im + m_im * other.m_re;
+	m_re = new_re;
+	m_im = new_im;
+	return *this;
+}
+Complex operator*(const Complex& v1, const Complex& v2) {
+	Complex tmp(v1);
+	return tmp *= v2;
+}

source/complex.h

+#pragma once
+#include <ostream>
+
+class Complex {
+public:
+	Complex() noexcept : m_re(0), m_im(0) {}
+	Complex(double re) noexcept : m_re(re), m_im(0) {}
+	Complex(double re, double im) noexcept : m_re(re), m_im(im) {}
+	Complex(Complex&& other) noexcept : m_re(std::move(other.m_re)), m_im(std::move(other.m_im)) {}
+	Complex(const Complex& other) noexcept : m_re(other.m_re), m_im(other.m_im) {}
+	Complex& operator=(const Complex& other) noexcept { m_re = other.m_re; m_im = other.m_im; return *this; }
+	Complex& operator+= (const Complex& other) noexcept;
+	Complex& operator-=(const Complex& other) noexcept;
+	Complex& operator*=(const Complex& other) noexcept;
+	Complex& operator/=(const Complex& other);
+	double length() const noexcept { return sqrt(pow(m_re, 2) + pow(m_im, 2)); }
+public:
+	double m_re;
+	double m_im;
+};
+
+bool operator==(const Complex& v1, const Complex& v2);
+bool operator>(const Complex& v1, const Complex& v2);
+bool operator<=(const Complex& v1, const Complex& v2);
+Complex operator+(const Complex& v1, const Complex& v2);
+Complex operator-(const Complex& v1, const Complex& v2);
+Complex operator*(const Complex& v1, const Complex& v2);
+Complex operator/(const Complex& v1, const Complex& v2);
+std::ostream& operator<<(std::ostream& out, const Complex& v);
+std::istream& operator>>(std::istream& in, Complex& v);
+
+bool check_char(std::istream& in, char expected);
+double fabs(const Complex& value) { return value.length(); }