What are complex data types?

The standard library provides a complex number type that encapsulates both the real and imaginary parts of a complex number. All arithmetic operators are overloaded to cater for the complex type:

#include<iOStream>

#include<complex>

int main()

{

std::complex<double> c {3.14, 4.2}, d {2.1, -1.2};

std::cout << c + d << std::endl;

}