From 67bb27e9f5beec4d8ca0a6c29f045d5f23d6f40f Mon Sep 17 00:00:00 2001
From: Nguyễn Gia Phong <mcsinyx@disroot.org>
Date: Sun, 28 Feb 2021 17:25:57 +0700
Subject: [lang] Reorganize language learning archive

---
 lang/cpptour/mycomplex.cc | 67 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 67 insertions(+)
 create mode 100644 lang/cpptour/mycomplex.cc

(limited to 'lang/cpptour/mycomplex.cc')

diff --git a/lang/cpptour/mycomplex.cc b/lang/cpptour/mycomplex.cc
new file mode 100644
index 0000000..fade98f
--- /dev/null
+++ b/lang/cpptour/mycomplex.cc
@@ -0,0 +1,67 @@
+#include "mycomplex.h"
+
+constexpr double
+square (double x)
+{
+  return x * x;
+}
+
+complex&
+operator*= (complex& a, complex b)
+{
+  double r = a.real() * b.real() - a.imag() * b.imag();
+  double i = a.real() * b.imag() + a.imag() * b.real();
+  a.real(r);
+  a.imag(i);
+  return a;
+}
+
+complex&
+operator/= (complex& a, complex b)
+{
+  double d = square(b.real()) + square(b.imag());
+  complex c {b.real() / d, -b.imag() / d};
+  return a *= c;
+}
+
+complex
+operator+ (complex a, complex b)
+{
+  return a += b;
+}
+
+complex
+operator- (complex a, complex b)
+{
+  return a -= b;
+}
+
+complex
+operator- (complex a)
+{
+  return {-a.real(), -a.imag()};
+}
+
+complex
+operator* (complex a, complex b)
+{
+  return a *= b;
+}
+
+complex
+operator/ (complex a, complex b)
+{
+  return a /= b;
+}
+
+bool
+operator== (complex a, complex b)
+{
+  return a.real() == b.real() && a.imag() == b.imag();
+}
+
+bool
+operator!= (complex a, complex b)
+{
+  return !(a == b);
+}
-- 
cgit 1.4.1