var f : file of TYPE; ... put(f);
The "put" procedure appends the value of the buffer variable "f^" to the file associated with "f". This file must be open before "put" is called. It is also necessary for "eof(f)" to be true, i.e. for the output file to be at "end of file".
When "put" is finished, "eof(f)" will be true and the value of "f^" will be undefined.
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