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| <h4 class="subsection">6.2.2 <code>ENCODE</code> and <code>DECODE</code> statements</h4> |
| |
| <p><a name="index-g_t_0040code_007bENCODE_007d-351"></a><a name="index-g_t_0040code_007bDECODE_007d-352"></a> |
| GNU Fortran does not support the <code>ENCODE</code> and <code>DECODE</code> |
| statements. These statements are best replaced by <code>READ</code> and |
| <code>WRITE</code> statements involving internal files (<code>CHARACTER</code> |
| variables and arrays), which have been part of the Fortran standard since |
| Fortran 77. For example, replace a code fragment like |
| |
| <pre class="smallexample"> INTEGER*1 LINE(80) |
| REAL A, B, C |
| c ... Code that sets LINE |
| DECODE (80, 9000, LINE) A, B, C |
| 9000 FORMAT (1X, 3(F10.5)) |
| </pre> |
| <p class="noindent">with the following: |
| |
| <pre class="smallexample"> CHARACTER(LEN=80) LINE |
| REAL A, B, C |
| c ... Code that sets LINE |
| READ (UNIT=LINE, FMT=9000) A, B, C |
| 9000 FORMAT (1X, 3(F10.5)) |
| </pre> |
| <p>Similarly, replace a code fragment like |
| |
| <pre class="smallexample"> INTEGER*1 LINE(80) |
| REAL A, B, C |
| c ... Code that sets A, B and C |
| ENCODE (80, 9000, LINE) A, B, C |
| 9000 FORMAT (1X, 'OUTPUT IS ', 3(F10.5)) |
| </pre> |
| <p class="noindent">with the following: |
| |
| <pre class="smallexample"> CHARACTER(LEN=80) LINE |
| REAL A, B, C |
| c ... Code that sets A, B and C |
| WRITE (UNIT=LINE, FMT=9000) A, B, C |
| 9000 FORMAT (1X, 'OUTPUT IS ', 3(F10.5)) |
| </pre> |
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