8.6 Carriage Control

When the first character of a formatted record is transferred to an output file or printer, it can be interpreted as a carriage control character (and not printed) if the file is opened with CARRIAGECONTROL='FORTRAN' in effect. On Tru64 UNIX systems, this is processed by the fortpr format utility.

The I/O system recognizes the characters listed in Table 8-5 as carriage control characters and does not print them. In this table, the symbol ^ represents a nonprinting space character.

Table 8-5 Carriage Control Characters

Character  Meaning  Effect 
Overprinting  Outputs the record (at the current position in the current line) and a carriage return. 
One line feed  Outputs the record (at the beginning of the following line) and a carriage return. 
Two line feeds  Outputs the record (after skipping a line) and a carriage return. 
Next page  Outputs the record (at the beginning of a new page) and a carriage return. 
$  Prompting   Outputs the record (at the beginning of a new line), but no carriage return. 
ASCII NUL[1]   Overprinting with no advance   Outputs the record (at the beginning of the current line), but no carriage return. 

[1] Specify as CHAR(0).

Any character other than those listed in Table 8-5 is interpreted as a space and is deleted from the print line. If you accidentally omit a carriage control character, the first character of the record is not printed.


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