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diff --git a/devdocs/c/numeric%2Fcomplex%2Fcomplex.html b/devdocs/c/numeric%2Fcomplex%2Fcomplex.html new file mode 100644 index 00000000..9ca58d2c --- /dev/null +++ b/devdocs/c/numeric%2Fcomplex%2Fcomplex.html @@ -0,0 +1,37 @@ + <h1 id="firstHeading" class="firstHeading">complex</h1> <table class="t-dcl-begin"> <tr class="t-dsc-header"> <th> Defined in header <code><complex.h></code> </th> <th> </th> <th> </th> </tr> <tr class="t-dcl t-since-c99"> <td> <pre data-language="c">#define complex _Complex</pre> +</td> <td class="t-dcl-nopad"> </td> <td> <span class="t-mark-rev t-since-c99">(since C99)</span> </td> </tr> </table> <p>This macro expands to a type specifier used to identify <a href="../../language/arithmetic_types#Complex_floating_types" title="c/language/arithmetic types">complex types</a>.</p> +<p>A program may undefine and perhaps then redefine the <code>complex</code> macro.</p> +<h3 id="Example"> Example</h3> <div class="t-example"> <div class="c source-c"><pre data-language="c">#include <stdio.h> +#include <complex.h> +#include <math.h> + +void print_complex(const char* note, complex z) +{ + printf("%s %f%+f*i\n", note, creal(z), cimag(z)); +} + +int main(void) +{ + double complex z = -1.0 + 2.0*I; + 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); +}</pre></div> <p>Output:</p> +<div class="text source-text"><pre data-language="c">z = -1.000000+2.000000*i +z² = -3.000000-4.000000*i +z² = -3.000000-4.000000*i</pre></div> </div> <h3 id="References"> References</h3> <ul> +<li> C17 standard (ISO/IEC 9899:2018): </li> +<ul><li> 7.3.1/4 complex (p: 136) </li></ul> +<li> C11 standard (ISO/IEC 9899:2011): </li> +<ul><li> 7.3.1/4 complex (p: 188) </li></ul> +<li> C99 standard (ISO/IEC 9899:1999): </li> +<ul><li> 7.3.1/2 complex (p: 170) </li></ul> +</ul> <h3 id="See_also"> See also</h3> <table class="t-dsc-begin"> <tr class="t-dsc"> <td> <div><a href="imaginary" title="c/numeric/complex/imaginary"> <span class="t-lines"><span>imaginary</span></span></a></div> +<div><span class="t-lines"><span><span class="t-mark-rev t-since-c99">(C99)</span></span></span></div> </td> <td> imaginary type macro <br> <span class="t-mark">(keyword macro)</span> </td> +</tr> </table> <div class="_attribution"> + <p class="_attribution-p"> + © cppreference.com<br>Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.<br> + <a href="https://en.cppreference.com/w/c/numeric/complex/complex" class="_attribution-link">https://en.cppreference.com/w/c/numeric/complex/complex</a> + </p> +</div> |