complex - cppreference.com (original) (raw)

| | | | | ------------------------- | | ----------- | | #define complex _Complex | | (since C99) |

This macro expands to a type specifier used to identify complex types.

A program may undefine and perhaps then redefine the complex macro.

[edit] Example

#include <complex.h> #include <math.h> #include <stdio.h>   void print_complex(const char* note, complex z) { printf("%s %f%+fi\n", note, creal(z), cimag(z)); }   int main(void) { double complex z = -1.0 + 2.0I; print_complex("z =", z); print_complex("z\u00B2 =", z * z); double complex z2 = ccos(2.0 * carg(z)) + csin(2.0 * carg(z))*I; print_complex("z\u00B2 =", cabs(z) * cabs(z) * z2); }

Output:

z = -1.000000+2.000000i z² = -3.000000-4.000000i z² = -3.000000-4.000000*i

[edit] References

• C23 standard (ISO/IEC 9899:2024):

• 7.3.1/4 complex (p: TBD)

• C17 standard (ISO/IEC 9899:2018):

• 7.3.1/4 complex (p: 136)

• C11 standard (ISO/IEC 9899:2011):

• 7.3.1/4 complex (p: 188)

• C99 standard (ISO/IEC 9899:1999):

• 7.3.1/2 complex (p: 170)

[edit] See also