real
Extracts the real component of a complex number.
template<class Type>
Type real(
const complex<Type>& _ComplexNum
);
Parameters
- _ComplexNum
The complex number whose real part is to be extracted.
Return Value
The real part of the complex number as a global function.
Remarks
This template function cannot be used to modify the real part of the complex number. To change the real part, a new complex number must be assigned the component value.
Example
// complex_real.cpp
// compile with: /EHsc
#include <complex>
#include <iostream>
int main( )
{
using namespace std;
complex <double> c1 ( 4.0 , 3.0 );
cout << "The complex number c1 = " << c1 << endl;
double dr1 = real ( c1 );
cout << "The real part of c1 is real ( c1 ) = "
<< dr1 << "." << endl;
double di1 = imag ( c1 );
cout << "The imaginary part of c1 is imag ( c1 ) = "
<< di1 << "." << endl;
}
The complex number c1 = (4,3) The real part of c1 is real ( c1 ) = 4. The imaginary part of c1 is imag ( c1 ) = 3.
Requirements
Header: <complex>
Namespace: std