Template:cpp/synopsis/cstdlib

namespace std {
  using size_t  = /* see description */; // freestanding
  using div_t   = /* see description */; // freestanding
  using ldiv_t  = /* see description */; // freestanding
  using lldiv_t = /* see description */; // freestanding
}

#define NULL          /* see description */ // freestanding
#define EXIT_FAILURE  /* see description */ // freestanding
#define EXIT_SUCCESS  /* see description */ // freestanding
#define RAND_MAX      /* see description */
#define MB_CUR_MAX    /* see description */

namespace std {
  // Exposition-only function type aliases
  extern "C" using /*c-atexit-handler*/ = void();                      // exposition-only
  extern "C++" using /*atexit-handler*/ = void();                      // exposition-only
  extern "C" using /*c-compare-pred*/ = int(const void*, const void*); // exposition-only
  extern "C++" using /*compare-pred*/ = int(const void*, const void*); // exposition-only

  // start and termination
  [[noreturn]] void abort() noexcept;                     // freestanding
  int atexit(/*c-atexit-handler*/* func) noexcept;        // freestanding
  int atexit(/*atexit-handler*/* func) noexcept;          // freestanding
  int at_quick_exit(/*c-atexit-handler*/* func) noexcept; // freestanding
  int at_quick_exit(/*atexit-handler*/* func) noexcept;   // freestanding
  [[noreturn]] void exit(int status);                     // freestanding
  [[noreturn]] void _Exit(int status) noexcept;           // freestanding
  [[noreturn]] void quick_exit(int status) noexcept;      // freestanding

  char* getenv(const char* name);
  int system(const char* string);

  // C library memory allocation
  void* aligned_alloc(size_t alignment, size_t size);
  void* calloc(size_t nmemb, size_t size);
  void free(void* ptr);
  void free_sized(void* ptr, size_t size);
  void free_aligned_sized(void* ptr, size_t alignment, size_t size);
  void* malloc(size_t size);
  void* realloc(void* ptr, size_t size);
  size_t memalignment(const void* p); // freestanding

  double atof(const char* nptr);
  int atoi(const char* nptr);
  long int atol(const char* nptr);
  long long int atoll(const char* nptr);
  double strtod(const char* nptr, char** endptr);
  int strfromd(char* s, size_t n, const char* format, double fp);
  int strfromf(char* s, size_t n, const char* format, float fp);
  int strfroml(char* s, size_t n, const char* format, long double fp);
  float strtof(const char* nptr, char** endptr);
  long double strtold(const char* nptr, char** endptr);
  long int strtol(const char* nptr, char** endptr, int base);
  long long int strtoll(const char* nptr, char** endptr, int base);
  unsigned long int strtoul(const char* nptr, char** endptr, int base);
  unsigned long long int strtoull(const char* nptr, char** endptr, int base);

  // multibyte / wide string and character conversion functions
  int mblen(const char* s, size_t n);
  int mbtowc(wchar_t* pwc, const char* s, size_t n);
  int wctomb(char* s, wchar_t wchar);
  size_t mbstowcs(wchar_t* pwcs, const char* s, size_t n);
  size_t wcstombs(char* s, const wchar_t* pwcs, size_t n);

  // C standard library algorithms
  void* bsearch(const void* key,          // freestanding
                void* base,
                size_t nmemb,
                size_t size,
                /*c-compare-pred*/* compar);
  void* bsearch(const void* key,          // freestanding
                void* base,
                size_t nmemb,
                size_t size,
                /*compare-pred*/* compar);
  const void* bsearch(const void* key,    // freestanding
                      const void* base,
                      size_t nmemb,
                      size_t size,
                      /*c-compare-pred*/* compar);
  const void* bsearch(const void* key,    // freestanding
                      const void* base,
                      size_t nmemb,
                      size_t size,
                      /*compare-pred*/* compar);
  void qsort(void* base,                  // freestanding
             size_t nmemb,
             size_t size,
             /*c-compare-pred*/* compar);
  void qsort(void* base,                  // freestanding
             size_t nmemb,
             size_t size,
             /*compare-pred*/* compar);

  // low-quality random number generation
  int rand();
  void srand(unsigned int seed);

  // absolute values
  constexpr int abs(int j);                              // freestanding
  constexpr long int abs(long int j);                    // freestanding
  constexpr long long int abs(long long int j);          // freestanding
  constexpr /*floating-point-type*/ abs(                 // freestanding-deleted
    /*floating-point-type*/ j);                                    

  constexpr long int labs(long int j);                   // freestanding
  constexpr long long int llabs(long long int j);        // freestanding

  constexpr div_t div(int numer, int denom);             // freestanding
  constexpr ldiv_t div(long int numer, long int denom);  // freestanding
  constexpr lldiv_t div(long long int numer,             // freestanding
    long long int denom);
  constexpr ldiv_t ldiv(long int numer, long int denom); // freestanding
  constexpr lldiv_t lldiv(long long int numer,           // freestanding
    long long int denom);
}