6.2.56 creall Function

Calculates the real part of a long double precision complex value.

Include

<complex.h>

Prototype

long double complex creall(long double complex z);

Argument

z

value for which to return the real part

Return Value

Returns the real part of the long double precision complex value z.

Example

See the notes at the beginning of this chapter or section for information on using printf() or scanf() (and other functions reading and writing the stdin or stdout streams) in the example code.

#include <stdio.h>
#include <complex.h>

int main(void)
{
  long double complex x;

  x = -2.0 + 1.0*I;
  printf("The real part of %Lf + %Lfi is %Lf\n", creall(x), cimagl(x), creall(x));
}

Example Output

The real part of -2.000000 + 1.000000i is -2.000000