std::strtof, std::strtod, std::strtold

 

C++

Compiler support

Freestanding and hosted

Language

Standard library

Standard library headers

Named requirements

Feature test macros (C++20)

Language support library

Concepts library (C++20)

Diagnostics library

Memory management library

Metaprogramming library (C++11)

General utilities library

Containers library

Iterators library

Ranges library (C++20)

Algorithms library

Strings library

Text processing library

Numerics library

Date and time library

Input/output library

Filesystem library (C++17)

Concurrency support library (C++11)

Execution control library (C++26)

Technical specifications

Symbols index

External libraries

 

Text processing library

Localization library

Regular expressions library (C++11)

Formatting library (C++20)

Null-terminated sequence utilities

Byte strings

Multibyte strings

Wide strings

Primitive numeric conversions

to_chars (C++17) to_chars_result (C++17) from_chars (C++17) from_chars_result (C++17) chars_format (C++17)

Text encoding identifications

text_encoding (C++26)

 

Null-terminated byte strings

Functions
Character classification
isalnum isalpha islower isupper isdigit isxdigit	isblank (C++11) iscntrl isgraph isspace isprint ispunct
Character manipulation
tolower	toupper
Conversions to numeric formats
atof atoiatolatoll (C++11) strtolstrtoll (C++11) strtoulstrtoull (C++11)	strtoimaxstrtouimax (C++11)(C++11) strtofstrtodstrtold (C++11)(C++11) strfromfstrfromdstrfroml (C++26)(C++26)(C++26)
String manipulation
strcpy strncpy strxfrm	strcat strncat
String examination
strlen strcmp strncmp strcoll strchr strrchr	strspn strcspn strpbrk strstr strtok
Character array functions
memchr memcmp memset	memcpy memmove
Miscellaneous
strerror

 

Defined in header <cstdlib>
float strtof ( const char* str, char** str_end );	(1)	(since C++11)