Reading a program

As an example we will read, execute and modify the program called <#329#>race<#329#> (see 3.1), stored in a file with the same name, which can be found on the floppy disc containing the Elan Programming Environment. We make sure the floppy disc is inserted and give the read-command


#litout490#

The programming environment reacts by asking


#litout492#

We now have to indicate the name of the file. We type in


#litout494#

Notice that this time we have to give a <#336#>;SPMlt;RET;SPMgt;<#336#> at the end in order to indicate that the name is completed. Since commands consist of one single letter they do not need such an indication. The status line now says


#litout496#

while the text of the refinements of the program passes over the screen. Upon completion of the reading, the interpreter gives a view, a list of all known refinements and an indication of the remaining memory space.


#litout498#

The status line again says


#litout500#

This view you now have can also be obtained by giving the list-command


#litout502#