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4 C Implementation-defined behavior

A conforming implementation of ISO C is required to document its choice of behavior in each of the areas that are designated “implementation defined.” The following lists all such areas, along with the section number from the ISO/IEC 9899:1999 standard.

• Translation implementation
• Environment implementation
• Identifiers implementation
• Characters implementation
• Integers implementation
• Floating point implementation
• Arrays and pointers implementation
• Hints implementation
• Structures unions enumerations and bit-fields implementation
• Qualifiers implementation
• Preprocessing directives implementation
• Library functions implementation
• Architecture implementation
• Locale-specific behavior implementation

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