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‎docs/standard-library/bad-alloc-class.md‎

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```cpp
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class bad_alloc : public exception {
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bad_alloc();
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virtual ~bad_alloc();
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virtual ~bad_alloc();
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bad_alloc(const bad_alloc&);
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bad_alloc& operator=(const bad_alloc&);
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const char* what() const override;
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};
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```
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‎docs/standard-library/bad-array-new-length.md‎

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---
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title: "bad_array_new_length Class"
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ms.date: "11/04/2016"
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f1_keywords: ["new/std::bad_alloc"]
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helpviewer_keywords: ["bad_alloc class"]
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ms.assetid: 6429a8e6-5a49-4907-8d56-f4a4ec8131d0
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---
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# bad_array_new_length Class
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The class describes an exception thrown to indicate that an allocation request did not succeed.
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## Syntax
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```cpp
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class bad_array_new_length : public bad_alloc {
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public: bad_array_new_length() noexcept;
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const char* what() const noexcept override;
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};
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```
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## Remarks
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The value returned by `what` is an implementation-defined C string. None of the member functions throw any exceptions.
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## Requirements
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**Header:** \<new>
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## See also
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[exception Class](../standard-library/exception-class.md)<br/>
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[Thread Safety in the C++ Standard Library](../standard-library/thread-safety-in-the-cpp-standard-library.md)

‎docs/standard-library/cfloat.md‎

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#include <cfloat>
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```
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## Definitions
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```cpp
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#define FLT_ROUNDS
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#define FLT_EVAL_METHOD
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#define FLT_HAS_SUBNORM
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#define DBL_HAS_SUBNORM
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#define LDBL_HAS_SUBNORM
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#define FLT_RADIX
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#define FLT_MANT_DIG
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#define DBL_MANT_DIG
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#define LDBL_MANT_DIG
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#define FLT_DECIMAL_DIG
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#define DBL_DECIMAL_DIG
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#define LDBL_DECIMAL_DIG
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#define DECIMAL_DIG
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#define FLT_DIG
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#define DBL_DIG
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#define LDBL_DIG
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#define FLT_MIN_EXP
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#define DBL_MIN_EXP
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#define LDBL_MIN_EXP
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#define FLT_MIN_10_EXP
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#define DBL_MIN_10_EXP
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#define LDBL_MIN_10_EXP
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#define FLT_MAX_EXP
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#define DBL_MAX_EXP
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#define LDBL_MAX_EXP
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#define FLT_MAX_10_EXP
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#define DBL_MAX_10_EXP
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#define LDBL_MAX_10_EXP
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#define FLT_MAX
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#define DBL_MAX
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#define LDBL_MAX
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#define FLT_EPSILON
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#define DBL_EPSILON
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#define LDBL_EPSILON
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#define FLT_MIN
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#define DBL_MIN
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#define LDBL_MIN
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#define FLT_TRUE_MIN
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#define DBL_TRUE_MIN
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#define LDBL_TRUE_MIN
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```
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## See also
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[Header Files Reference](../standard-library/cpp-standard-library-header-files.md)<br/>

‎docs/standard-library/climits.md‎

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Including this header ensures that the names declared using external linkage in the Standard C library header are declared in the `std` namespace.
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## Definitions
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```cpp
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#define CHAR_BIT
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#define SCHAR_MIN
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#define SCHAR_MAX
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#define UCHAR_MAX
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#define CHAR_MIN
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#define CHAR_MAX
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#define MB_LEN_MAX
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#define SHRT_MIN
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#define SHRT_MAX
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#define USHRT_MAX
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#define INT_MIN
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#define INT_MAX
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#define UINT_MAX
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#define LONG_MIN
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#define LONG_MAX
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#define ULONG_MAX
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#define LLONG_MIN
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#define LLONG_MAX
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#define ULLONG_MAX
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```
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## See also
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[Header Files Reference](../standard-library/cpp-standard-library-header-files.md)<br/>

‎docs/standard-library/cstdint.md‎

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#include <cstdint>
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```
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## Types
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```cpp
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namespace std { using int8_t = signed integer type; // optional
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using int16_t = signed integer type; // optional
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using int32_t = signed integer type; // optional
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using int64_t = signed integer type; // optional
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using int_fast8_t = signed integer type;
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using int_fast16_t = signed integer type;
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using int_fast32_t = signed integer type;
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using int_fast64_t = signed integer type;
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using int_least8_t = signed integer type;
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using int_least16_t = signed integer type;
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using int_least32_t = signed integer type;
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using int_least64_t = signed integer type;
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using intmax_t = signed integer type;
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using intptr_t = signed integer type; // optional
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using uint8_t = unsigned integer type; // optional
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using uint16_t = unsigned integer type; // optional
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using uint32_t = unsigned integer type; // optional
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using uint64_t = unsigned integer type; // optional
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using uint_fast8_t = unsigned integer type;
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using uint_fast16_t = unsigned integer type;
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using uint_fast32_t = unsigned integer type;
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using uint_fast64_t = unsigned integer type;
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using uint_least8_t = unsigned integer type;
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using uint_least16_t = unsigned integer type;
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using uint_least32_t = unsigned integer type;
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using uint_least64_t = unsigned integer type;
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using uintmax_t = unsigned integer type;
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using uintptr_t = unsigned integer type; // optional
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```
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## Remarks
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Including this header ensures that the names declared using external linkage in the Standard C library header are declared in the `std` namespace.

‎docs/standard-library/cstdlib.md‎

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Including this header ensures that the names declared using external linkage in the Standard C library header are declared in the `std` namespace.
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## Types
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```cpp
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using size_t = see below;
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using div_t = see below;
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using ldiv_t = see below;
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using lldiv_t = see below;
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```
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## Definitions
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```cpp
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#define NULL
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#define EXIT_FAILURE
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#define EXIT_SUCCESS
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#define RAND_MAX
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#define MB_CUR_MAX
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```
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## Functions
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```cpp
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function type aliases extern "C"
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using c-atexit-handler = void();
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using atexit-handler = void();
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using c-compare-pred = int(const void*, const void*);
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using compare-pred = int(const void*, const void*);
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```
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### Start and Termination
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```cpp
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void abort() noexcept;
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int atexit(c-atexit-handler* func) noexcept;
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int atexit(atexit-handler* func) noexcept;
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int at_quick_exit(c-atexit-handler* func) noexcept;
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int at_quick_exit(atexit-handler* func) noexcept;
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void exit(int status);
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void _Exit(int status) noexcept;
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void quick_exit(int status) noexcept;
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char* getenv(const char* name);
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int system(const char* string);
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void* aligned_alloc(size_t alignment, size_t size);
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void* calloc(size_t nmemb, size_t size);
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void free(void* ptr);
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void* malloc(size_t size);
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void* realloc(void* ptr, size_t size);
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double atof(const char* nptr);
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int atoi(const char* nptr);
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long int atol(const char* nptr);
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long long int atoll(const char* nptr);
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double strtod(const char* nptr, char** endptr);
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float strtof(const char* nptr, char** endptr);
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long double strtold(const char* nptr, char** endptr);
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long int strtol(const char* nptr, char** endptr, int base);
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long long int strtoll(const char* nptr, char** endptr, int base);
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unsigned long int strtoul(const char* nptr, char** endptr, int base);
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unsigned long long int strtoull(const char* nptr, char** endptr, int base);
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```
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### Multibyte / Wide String and Character Conversion
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```cpp
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int mblen(const char* s, size_t n);
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int mbtowc(wchar_t* pwc, const char* s, size_t n);
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int wctomb(char* s, wchar_t wchar);
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size_t mbstowcs(wchar_t* pwcs, const char* s, size_t n);
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size_t wcstombs(char* s, const wchar_t* pwcs, size_t n);
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```
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### C Standard Library Algorithms
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```cpp
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void* bsearch(const void* key, const void* base, size_t nmemb, size_t size, c-compare-pred* compar);
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void* bsearch(const void* key, const void* base, size_t nmemb, size_t size, compare-pred* compar);
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void qsort(void* base, size_t nmemb, size_t size, c-compare-pred* compar);
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void qsort(void* base, size_t nmemb, size_t size, compare-pred* compar);
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```
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### Low-quality Random Number Generation
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```cpp
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int rand();
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void srand(unsigned int seed);
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```
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### Absolute Values
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```cpp
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int abs(int j);
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long int abs(long int j);
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long long int abs(long long int j);
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float abs(float j);
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double abs(double j);
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long double abs(long double j);
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long int labs(long int j);
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long long int llabs(long long int j);
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div_t div(int numer, int denom);
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ldiv_t div(long int numer, long int denom);
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lldiv_t div(long long int numer, long long int denom);
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ldiv_t ldiv(long int numer, long int denom);
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lldiv_t lldiv(long long int numer, long long int denom);
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```
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## See also
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[Header Files Reference](../standard-library/cpp-standard-library-header-files.md)<br/>

‎docs/standard-library/new-functions.md‎

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---
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title: "&lt;new&gt; functions"
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ms.date: "11/04/2016"
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f1_keywords: ["new/std::nothrow", "new/std::set_new_handler"]
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f1_keywords: ["new/std::get_new_handler", "new/std::nothrow", "new/std::set_new_handler"]
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ms.assetid: e250f06a-b025-4509-ae7a-5356d56aad7d
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---
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# &lt;new&gt; functions
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|-|-|
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|[nothrow](#nothrow)|[set_new_handler](#set_new_handler)|
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|[get_new_handler](#get_new_handler)|[nothrow](#nothrow)|
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|[set_new_handler](#set_new_handler)|[set_new_handler](#set_new_handler)|
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## <a name="nothrow"></a> nothrow
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## <a name="get_new_handler"></a> get_new_handler
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```cpp
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new_handler get_new_handler() noexcept;
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```
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## <a name="nothrow"></a> nothrow
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Provides an object to be used as an argument for the **nothrow** versions of **new** and **delete**.
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See [operator new](../standard-library/new-operators.md#op_new) and [operator new&#91;&#93;](../standard-library/new-operators.md#op_new_arr) for examples of how `std::nothrow_t` is used as a function parameter.
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## <a name="set_new_handler"></a> set_new_handler
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## <a name="set_new_handler"></a> set_new_handler
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Installs a user function that is to be called when **operator new** fails in its attempt to allocate memory.
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‎docs/standard-library/new-typedefs.md‎

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### Remarks
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This type of handler function is called by **operatornew** or `operator new[]` when they cannot satisfy a request for additional storage.
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This type of handler function is called by **operator new** or `operator new[]` when they cannot satisfy a request for additional storage.
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### Example
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‎docs/standard-library/new.md‎

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# &lt;new&gt;
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Defines several types and functions that control the allocation and freeing of storage under program control. It also defines components for reporting on storage management errors.
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## Syntax
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```cpp
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|Function|Description|
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|[get_new_handler](../standard-library/new-functions.md#get_new_handler)||
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|[set_new_handler](../standard-library/new-functions.md#set_new_handler)|Installs a user function that is called when new fails in its attempt to allocate memory.|
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### Operators
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|[operator new](../standard-library/new-operators.md#op_new)|The function called by a new expression to allocate storage for individual objects.|
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|[operator new&#91;&#93;](../standard-library/new-operators.md#op_new_arr)|The function called by a new expression to allocate storage for an array of objects.|
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### Enums
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|-|-|
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|[align_val_t](../standard-library/new-operators.md
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### Classes
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|Class|Description|
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|[bad_alloc Class](../standard-library/bad-alloc-class.md)|The class describes an exception thrown to indicate that an allocation request did not succeed.|
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|[bad_array_new_length Class](../standard-library/bad-array-new-length-class.md)||
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|[nothrow_t Class](../standard-library/nothrow-t-structure.md)|The class is used as a function parameter to operator new to indicate that the function should return a null pointer to report an allocation failure, rather than throw an exception.|
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## See also

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