pSOSystem System Calls - Read

fscanf pREPC+ System Calls
Except in the case of a % specifier, the input item (or, in the case of a
%n directive, the count of input characters) is converted to a type
appropriate to the conversion specifier. If the input item is not a
matching sequence, the execution of the directive fails: this
condition is a matching failure. Unless assignment suppression was
indicated by a *, the result of the conversion is placed in the object
pointed to by the first argument following the format argument that
has not already received a conversion result. If this object does not
have an appropriate type, or if the result of the conversion cannot be
represented in the space provided, the behavior is undefined.
The conversion specifier characters and their definitions are as
follows:
d, i An optionally signed decimal integer is expected. The
corresponding argument should be a pointer to an integer.
o An optionally signed octal integer is expected. The
corresponding argument should be a pointer to an integer.
u An optionally signed octal integer is expected. The
corresponding argument should be a pointer to an unsigned
long integer.
x An optionally signed hexadecimal integer is expected. The
corresponding argument should be a pointer to an integer.
e,f,g An optionally signed floating-point number is expected. The
corresponding argument should be a pointer to a float.
p An unsigned hexadecimal number is expected. The
corresponding argument should be a pointer to a pointer to
void.
s A sequence of non-white-space characters is expected. The
corresponding argument should be a pointer to a character
array large enough to accept the sequence and an added,
terminating null character.
c A sequence of characters is expected. The number of
characters in the sequence should be equal to the field
width. If the field width is not specified, one character is
expected. The corresponding argument should be a pointer
to a character array large enough to accept the sequence. A
terminating null character is not added.
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