C99

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ISO/IEC 9899:1999, a.k.a. C99, is a previous revision of the C standard.

Obsolete

Removed

  • Implicit int in declarations
  • Implicit function declarations

Deprecated

New language features

Feature test macros for optional features

New library features

New headers

  • <complex.h>
  • <fenv.h>
  • <inttypes.h>
  • <stdbool.h>
  • <stdint.h>
  • <tgmath.h>

Library features

Defect reports

Template:c/language/history/DR99

Compiler support

Template:c/compiler support/99