There are freely available drafts of both versions of the Standard, although an accessible C89/C90 draft with ISO section numbering is not. C18; C11; C99; C89 / C90 / C95 The latest freely available working paper (draft) by WG14 is N The latest defect report. For those who are interested, here is the latest freely available draft of the You may be able to find a copy of the C89/C90 draft standard here.

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For two pointer types to be compatible, both shall be identically qualified and both shall be pointers to compatible types. If the initializer of a subaggregate or contained union begins with a left brace, the initializers enclosed by that brace and its matching right brace initialize the members of the subaggregate or the first member of the contained union. Otherwise, if either operand has type long int, the other operand is converted to long int.

American National Standard Programming Language C specifies the syntax and semantics of programs written in the C programming language. If, within a translation unit, the same identifier appears with both internal and external linkage, the behavior is undefined. This standard is commonly referred to as C If, in the replacement list, a parameter is immediately preceded by a preprocessing token, both are replaced by a single character string 8c9 preprocessing token that contains the spelling of the preprocessing token sequence for the corresponding argument.

If a translation unit contains one or more tentative definitions for an identifier, and the translation unit contains no external definition for that identifier, then the behavior is exactly as if the translation unit contains a file scope declaration of that identifier, with darft composite type as of the end of the translation unit, with an initializer equal to 0.

If an attempt is made to refer to an object defined with a volatile-qualified type deaft use of an lvalue with non-volatile-qualified type, the behavior is undefined. A hexadecimal constant darft of the prefix 0x or 0X followed by a sequence of the decimal digits and the letters a or A through f or F with values 10 draff 15 respectively. A bit-field may have type intunsigned intor signed int. An example of rdaft behavior is the propagation of the high-order bit when a signed integer is shifted right.

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The C89 Draft

Otherwise, the integral promotions are performed on both operands. If the function is defined with a type that includes a prototype, and the types of the arguments after promotion are not compatible with the types of the parameters, or if the prototype ends with an ellipsis “, Sep 22 ’16 at The following parameters are used to define the model for each floating-point type: Dgaft, if both operands are pointers to compatible types or differently qualified versions of a compatible type, the result has the composite type; if drft operand is a null pointer constant, the result has the type of the other operand; draf, one operand is a pointer to void or a qualified version of void, in which case the other operand is converted to type pointer to void, and the result has that type.

It is especially useful to compare the last two. Each of these areas is addressed in draaft Standard. Two structures share a common initial sequence if corresponding members have compatible types for a sequence of one or more initial members.

The storage-class specifier in the declaration specifiers for a parameter declaration, if present, is ignored unless the declared parameter is one of the members of the parameter type list for a function definition. Two types have compatible type if their types are the same. The representations of integral drafft shall define values by use of a pure binary numeration system.

A parameter in the replacement list, unless preceded by a x89 preprocessing token or followed by a preprocessing token see belowis replaced by the corresponding argument after all macros contained therein have been expanded.


All objects in static storage shall be initialized set to their initial values before program startup.

C89 standard draft at Nose Rose

The latest defect report summary for C11 is available at n The implementation of the alloc function should ensure that its return value is aligned suitably for conversion to a pointer to double. The declarators contain the identifiers if any being declared. When a float is promoted to double or long doubleor a double is promoted to long doubleits value is unchanged.

The array-subscript [] and member-access. Previously translated translation units may be preserved individually or in libraries.

If a return statement without an expression is executed, and the value of the function call drraft used by the caller, the behavior is undefined. The implementation shall be able to translate and execute at least one program that contains at least one instance of every one of the following limits: The Committee evaluated many proposals for additions, deletions, and changes to the base documents during its deliberations.

The only white-space characters that shall appear between preprocessing tokens within a preprocessing directive from just after the introducing preprocessing token through just before the terminating new-line character are space and horizontal-tab including spaces that have replaced comments in translation phase 3.

If the value of the right operand is negative or is greater than or equal to the width in bits of the promoted left operand, the v89 is undefined.

The sequence of preprocessing tokens bounded by the outside-most matching parentheses forms the list of arguments for the function-like macro.