ISO/IEC 9899:1999 (E) ©ISO/IEC
2
EXAMPLE An example of locale-specific behavior is whether the islower function returns true for
characters other than the 26 lowercase Latin letters.
3.4.3
1 undefined behavior
behavior, upon use of a nonportable or erroneous program construct or of erroneous data,
for which this International Standard imposes no requirements
2
NOTE Possible undefined behavior ranges from ignoring the situation completely with unpredictable
results, to behaving during translation or program execution in a documented manner characteristic of the
environment (with or without the issuance of a diagnostic message), to terminating a translation or
execution (with the issuance of a diagnostic message).
3
EXAMPLE An example of undefined behavior is the behavior on integer overflow.
3.4.4
1 unspecified behavior
behavior where this International Standard provides two or more possibilities and
imposes no further requirements on which is chosen in any instance
2
EXAMPLE An example of unspecified behavior is the order in which the arguments to a function are
evaluated.
3.5
1 bit
unit of data storage in the execution environment large enough to hold an object that may
have one of two values
2
NOTE It need not be possible to express the address of each individual bit of an object.
3.6
1 byte
addressable unit of data storage large enough to hold any member of the basic character
set of the execution environment
2
NOTE 1 It is possible to express the address of each individual byte of an object uniquely.
3
NOTE 2 A byte is composed of a contiguous sequence of bits, the number of which is implementation-
defined. The least significant bit is called the low-order bit; the most significant bit is called the high-order
bit.
3.7
1 character
〈abstract〉 member of a set of elements used for the organization, control, or
representation of data
3.7.1
1 character
single-byte character
〈C〉 bit representation that fits in a byte
4 General §3.7.1
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