Page 133 - Standard Handbook Of Petroleum & Natural Gas Engineering

118 Mathematics

Table 1-26
FORTRAN Edit Specifiers
A Character data fields
D Double precision data fields
E Real data fields-exponential (E) notation
F Real data fields-decimal notation
G General form
H Character constants
I Integer data fields
L Logical data fields
P Scaie factors, used with D, E, F. and G specifiers to shift the decimal
point or exponent size for output
S Restores the optional + convention to the compiler
SP Prints + with all subsequent positive data
ss Suppresses + for all subsequent positive data
TL Next character will be inputloutput the specified number of spaces
left of the current position
TR Next character will be inpuffoutput the specified number of spaces
right of the current position
X Skip the specified number of spaces before next character is inpuvoutput
Ends format control if no more data items in list
I Skips a record
Specifiers for input operations only

BN Specifies that blank characters are to be ignored
BZ Specifies blank characters are to be read as zeros
Specifications for time four most common data types

Integer Iw
Real Fw.d
Character Aw
Exponential Ew.d

as sequential files, while disk files may be sequential or random access. The
following statements are generally accepted forms:
OPEN(1ist of specifiers)-Connects an existing file to an 1/0 device or generates
a new file, and specifies a device (unit) number. The specifiers (required and
optional) are:

UNIT = file unit (device) number
IOSTAT integer variable for I/O status
FILE name of file
ERR label for error transfer
STATUS file status descriptor, may be OLD, NEW, SCRATCH, or UN-
KNOWN
ACCESS may be SEQUENTIAL or DIRECT
FORM may be FORMATTED or UNFORMATTED
RECL record length, if file access is DIRECT
BLANK specifies blank handling, either NULL or ZERO