real

Returns the real part of a complex number or converts a BCD number back to float, double or long double.

Defined in header <complex.h>

Syntax

As defined in complex:         As defined in bed:
#include <complex.h>           #include <bcd.h>
double reaKcomplex  x);         double real(bcd x);

Portability

Remarks

The data associated to a complex number consists of two floating-point numbers, real returns the one considered to be the real part.

You can also use real to convert a binary coded decimal number back to a float, double, or long double.

Return value

The real part of part of the complex number.

See also

• bed
• complex
• imag

Example

#include <complex.h>

int main(void)
{
   double X = 3.1, y = 4.2;
   complex z = complex(x,y);
   cout «  "z = " «  z «  "\n";
   cout «  "  has real part = " «  real(z) «  "\n";
   cout << "  and imaginary real part = " «  imag(z) << "\n";
   cout << "z has complex conjugate = " «  con](z) << "\n";
   return 0;
#include <bcd.h>
#include <iostream.h>
int main(void)
{
   bed X = 3.1;
   cout << "The bed number x = " << x << "\n";
   eout << "Its binary equivalent is " << real(x) << "\n";
   return 0;

Differences from modern implementations

Nothing recorded yet.

Modern references

• Microsoft C runtime (search)

These are search links, not yet checked by hand.

Stable link: /3.1/complex.h/real/ · short form /3.1/real/