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| <title>The GNU Fortran Compiler: DCMPLX</title> |
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| <a name="DCMPLX-_002d_002d_002d-Double-complex-conversion-function"></a> |
| <h3 class="section">9.77 <code>DCMPLX</code> — Double complex conversion function</h3> |
| <a name="index-DCMPLX"></a> |
| <a name="index-complex-numbers_002c-conversion-to-2"></a> |
| <a name="index-conversion_002c-to-complex-2"></a> |
| |
| <dl compact="compact"> |
| <dt><em>Description</em>:</dt> |
| <dd><p><code>DCMPLX(X [,Y])</code> returns a double complex number where <var>X</var> is |
| converted to the real component. If <var>Y</var> is present it is converted to the |
| imaginary component. If <var>Y</var> is not present then the imaginary component is |
| set to 0.0. If <var>X</var> is complex then <var>Y</var> must not be present. |
| </p> |
| </dd> |
| <dt><em>Standard</em>:</dt> |
| <dd><p>GNU extension |
| </p> |
| </dd> |
| <dt><em>Class</em>:</dt> |
| <dd><p>Elemental function |
| </p> |
| </dd> |
| <dt><em>Syntax</em>:</dt> |
| <dd><p><code>RESULT = DCMPLX(X [, Y])</code> |
| </p> |
| </dd> |
| <dt><em>Arguments</em>:</dt> |
| <dd><table> |
| <tr><td width="15%"><var>X</var></td><td width="70%">The type may be <code>INTEGER</code>, <code>REAL</code>, |
| or <code>COMPLEX</code>.</td></tr> |
| <tr><td width="15%"><var>Y</var></td><td width="70%">(Optional if <var>X</var> is not <code>COMPLEX</code>.) May be |
| <code>INTEGER</code> or <code>REAL</code>.</td></tr> |
| </table> |
| |
| </dd> |
| <dt><em>Return value</em>:</dt> |
| <dd><p>The return value is of type <code>COMPLEX(8)</code> |
| </p> |
| </dd> |
| <dt><em>Example</em>:</dt> |
| <dd><div class="smallexample"> |
| <pre class="smallexample">program test_dcmplx |
| integer :: i = 42 |
| real :: x = 3.14 |
| complex :: z |
| z = cmplx(i, x) |
| print *, dcmplx(i) |
| print *, dcmplx(x) |
| print *, dcmplx(z) |
| print *, dcmplx(x,i) |
| end program test_dcmplx |
| </pre></div> |
| </dd> |
| </dl> |
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