ELEC2645 Embedded Systems Project

Introduction

You should be very familiar with the primitive numeric datatypes such as int and double. These are obviously very useful for doing calculations. Unfortunately as electronic engineers, we often have to use complex numbers. Fortunately, the C++ standard library contains a complex number class.

It can be used by including the following header.

#include <complex>

Example

This simple example below demonstrates how to create a complex number object and use some of the class methods to get the real, imaginary, absolute and phase of the number.

#include <complex>
#include <iostream>

int main() {
  std::complex<double> v(2.0, -1.0);
  std::cout << "Real part = " << v.real() << std::endl;
  std::cout << "Imaginary part = " << v.imag() << std::endl;

  std::cout << "Absolute value = " << std::abs(v) << std::endl;
  std::cout << "Phase angle = " << std::arg(v) << std::endl;
}

This would produce the following output.

Real part = 2
Imaginary part = -1
Absolute value = 2.23607
Phase angle = -0.463648

Complex

Introduction

Example