[C++英文原版书籍]Ansi.C.Standard.pdf

Programming languages — C

ABSTRACT

(Cover sheet to be provided by ISO Secretariat.)

This International Standard specifies the form and establishes the interpretation of

programs expressed in the programming language C. Its purpose is to promote

portability, reliability, maintainability, and efficient execution of C language programs on

a variety of computing systems.

Clauses are included that detail the C language itself and the contents of the C language

execution library. Annexes summarize aspects of both of them, and enumerate factors

Electrotechnical Commission) form the specialized system for worldwide

take part in the work.

Directives, Part 3. Accordingly, annexes F and I form a normative p

art of this standard;

committee are circulated to national bodies for voting. Publication as an International

Standard requires approval by at least 75% of the national bodies casting a vote.

4 International Standard ISO/IEC 9899 was prepared by Joint Technical Committee

ISO/IEC JTC 1, ‘‘Information Technology’’, subcommittee 22, ‘‘Programming

languages, their environments and system software interfaces’’.

added to this International Standard. Subclauses in the language and library clauses warn

implementors and programmers of usages which, though valid in themselves, may

conflict with future additions.

features) or new programs (for language [6.11] or library features [7.26]) is discouraged.

3 This International Standard is divided into four major subdivisions:

other related subclauses. Recommendations are provided to give a

dvice or guidance to

implementors. Annexes pro

contained in this International Standard. A bibliography l

referred to during the preparation of the standard.

5 The language clause (clause 6) is derived from ‘‘The C Reference Manual’’.

6 The library clause (clause 7) is based on the 1984 /usr/group Standard.

6. Language ............................ 25