std::from_chars

std::from_chars_result from_chars(const char* first, const char* last, /*see below*/& value, int base = 10);

(1)

(since C++17)

std::from_chars_result from_chars(const char* first, const char* last, float& value, std::chars_format fmt = std::chars_format::general);

(2)

(since C++17)

std::from_chars_result from_chars(const char* first, const char* last, double& value, std::chars_format fmt = std::chars_format::general);

(3)

(since C++17)

std::from_chars_result from_chars(const char* first, const char* last, long double& value, std::chars_format fmt = std::chars_format::general);

(4)

(since C++17)

struct from_chars_result { const char* ptr; std::error_code ec; };

(5)

(since C++17)

value

-

the out-parameter where the parsed value is stored if successful

base

-

integer base to use: a value between 2 and 36 (inclusive).

fmt

-

floating-point formatting to use, a bitmask of type std::chars_format

stofstodstold (C++11)(C++11)(C++11)

converts a string to a floating point value (function)

strtolstrtoll

converts a byte string to an integer value (function)

strtofstrtodstrtold

converts a byte string to a floating point value (function)

scanffscanfsscanf

reads formatted input from stdin, a file stream or a buffer (function)

operator>>

extracts formatted data (public member function of std::basic_istream)