Defaults for w, d, and e

You can write field descriptors A, D, E, F, G, I, L, O, or Z without the w, d, or e field indicators. @ If these are left unspecified, the appropriate defaults are used based on the data type of the I/O list element. See Table 5-3.

Typical format field descriptor forms that use w, d, or e include:

Aw, Iw, Lw, Ow, Zw, Dw.d, Ew.d, Gw.d, Ew.dEe, Gw.dEe

Example: With the default w=7 for INTEGER*2, and since 161 decimal = A1 hex:

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	INTEGER*2 M 
	M = 161 
	WRITE ( *, 8 ) M 
8	FORMAT ( Z ) 
	END

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This example produces the following output:

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demo% f77 def1.f 
def1.f: 
 MAIN: 
demo% a.out
¤¤¤¤¤a1
demo%

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The defaults for w, d, and e are summarized in the following table.

Table 5-3 Default w, d, e Values in Format Field Descriptors

Field Descriptor	List Element	w	d	e
I,O,Z	BYTE	7	-	-
I,O,Z	INTEGER*2, LOGICAL*2	7	-	-
I,O,Z	INTEGER*4, LOGICAL*4	12	-	-
O,Z	REAL*4	12	-	-
O,Z	REAL*8	23	-	-
O,Z	REAL*16, COMPLEX*32	44	-	-
L	LOGICAL	2	-	-
F,E,D,G	REAL, COMPLEX*8	15	7	2
F,E,D,G	REAL*8, COMPLEX*16	25	16	2
F,E,D,G	REAL*16, COMPLEX*32	42	33	3
A	LOGICAL*1	1	-	-
A	LOGICAL*2, INTEGER*2	2	-	-
A	LOGICAL*4, INTEGER*4	4	-	-
A	REAL*4, COMPLEX*8	4	-	-
A	REAL*8, COMPLEX*16	8	-	-
A	REAL*16, COMPLEX*32	16	-	-
A	CHARACTER*n	n	-	-

For complex items, the value for w is for each real component. The default for the A descriptor with character data is the declared length of the corresponding I/O list element. REAL*16 and COMPLEX*32 are SPARC only.