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Puthd places information in the heading block and is formatted as is the normal put command with the syntax
Puthd Item;
Example:
(putex5.gms)
Puthd "Page " system.page /;
Notes:
| • | Once a Puthd command is executed the items therein are placed in the heading block. |
| • | The heading block is displayed on each subsequent page unless modified. |
| • | The heading block can be emptied out using Putclear. |
| • | Once the main window for a page has been is written to, any further modifications of the header block will be shown on subsequent pages and not the current page. |
| • | Every page must have an entry in the main window. When a page has no output in its main window, the page is not written to file regardless of whether there are output items in the title or header blocks. To force a page that has an empty window out to file, simply write something innocuous to the window such as: Put ''; |
| • | The size of any area within a given page is based entirely on the number of lines put into it. |
| • | The total number of lines for all areas must fit within the specified page size. |
| • | If the total number of lines written to the title and header block equals or exceeds the page size, an overflow error will be displayed in the program listing. |
| • | Paging occurs automatically whenever a page is full. |
| • | Each area of a page is maintained independently, so we can write with a Puttl for a while then a Puthd, then back to a Puttl. However once we use Put all subsequent Puttl and Puthd go to the next and subsequent pages, not the current page. |
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