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| <h4 class="subsection">6.2.3 Variable <code>FORMAT</code> expressions</h4> |
| |
| <p><a name="index-g_t_0040code_007bFORMAT_007d-353"></a> |
| A variable <code>FORMAT</code> expression is format statement which includes |
| angle brackets enclosing a Fortran expression: <code>FORMAT(I<N>)</code>. GNU |
| Fortran does not support this legacy extension. The effect of variable |
| format expressions can be reproduced by using the more powerful (and |
| standard) combination of internal output and string formats. For example, |
| replace a code fragment like this: |
| |
| <pre class="smallexample"> WRITE(6,20) INT1 |
| 20 FORMAT(I<N+1>) |
| </pre> |
| <p class="noindent">with the following: |
| |
| <pre class="smallexample"> c Variable declaration |
| CHARACTER(LEN=20) FMT |
| c |
| c Other code here... |
| c |
| WRITE(FMT,'("(I", I0, ")")') N+1 |
| WRITE(6,FMT) INT1 |
| </pre> |
| <p class="noindent">or with: |
| |
| <pre class="smallexample"> c Variable declaration |
| CHARACTER(LEN=20) FMT |
| c |
| c Other code here... |
| c |
| WRITE(FMT,*) N+1 |
| WRITE(6,"(I" // ADJUSTL(FMT) // ")") INT1 |
| </pre> |
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