Namespaces
Variants
Views
Actions

Difference between revisions of "cpp/string/basic string/to string"

From cppreference.com
< cpp‎ | string‎ | basic string
(+summary)
Line 35: Line 35:
  
 
@1@ Converts a signed decimal integer to a string with the same content as what  {{c|std::sprintf(buf, "%d", value)}} would produce for sufficiently large {{tt|buf}}.
 
@1@ Converts a signed decimal integer to a string with the same content as what  {{c|std::sprintf(buf, "%d", value)}} would produce for sufficiently large {{tt|buf}}.
−
@2@ Converts a signed decimal integer to a string with the same content as what  {{c|std::sprintf(buf, "%ld", value)}} would produce for sufficiently large {{tt|buf}}..
+
@2@ Converts a signed decimal integer to a string with the same content as what  {{c|std::sprintf(buf, "%ld", value)}} would produce for sufficiently large {{tt|buf}}.
 
@3@ Converts a signed decimal integer to a string with the same content as what  {{c|std::sprintf(buf, "%lld", value)}} would produce for sufficiently large {{tt|buf}}.
 
@3@ Converts a signed decimal integer to a string with the same content as what  {{c|std::sprintf(buf, "%lld", value)}} would produce for sufficiently large {{tt|buf}}.
 
@4@ Converts an unsigned decimal integer to a string with the same content as what  {{c|std::sprintf(buf, "%u", value)}} would produce for sufficiently large {{tt|buf}}.
 
@4@ Converts an unsigned decimal integer to a string with the same content as what  {{c|std::sprintf(buf, "%u", value)}} would produce for sufficiently large {{tt|buf}}.

Revision as of 07:00, 5 June 2014

 
C++
 
Strings library
 
std::basic_string
Member functions
(C++23)
Element access
(DR*)
(DR*)
(C++17)
Iterators
(C++11)
(C++11)
(C++11)
(C++11)
Capacity
(DR*)
Modifiers
(C++23)
(DR*)
(C++23)
(C++23)
(C++23)  
Search
Operations
(C++20)
(C++20)
(C++23)
Constants
Non-member functions
(C++20)(C++20)
I/O
Comparison
(until C++20)(until C++20)(until C++20)(until C++20)(until C++20)(C++20)
Numeric conversions
(C++11)(C++11)(C++11)
(C++11)(C++11)
(C++11)(C++11)(C++11)
to_string
(C++11)
(C++11)
Literals
(C++14)
Helper classes
(C++11)
Deduction guides (C++17)

 
Defined in header <string>
std::string to_string( int value );
 (1) (since C++11)
std::string to_string( long value );
 (2) (since C++11)
std::string to_string( long long value );
 (3) (since C++11)
std::string to_string( unsigned value );
 (4) (since C++11)
std::string to_string( unsigned long value );
 (5) (since C++11)
std::string to_string( unsigned long long value );
 (6) (since C++11)
std::string to_string( float value );
 (7) (since C++11)
std::string to_string( double value );
 (8) (since C++11)
std::string to_string( long double value );
 (9) (since C++11)

Converts a numeric value to std::string.

1) Converts a signed decimal integer to a string with the same content as what std::sprintf(buf, "%d", value) would produce for sufficiently large buf.
2) Converts a signed decimal integer to a string with the same content as what std::sprintf(buf, "%ld", value) would produce for sufficiently large buf.
3) Converts a signed decimal integer to a string with the same content as what std::sprintf(buf, "%lld", value) would produce for sufficiently large buf.
4) Converts an unsigned decimal integer to a string with the same content as what std::sprintf(buf, "%u", value) would produce for sufficiently large buf.
5) Converts an unsigned decimal integer to a string with the same content as what std::sprintf(buf, "%lu", value) would produce for sufficiently large buf.
6) Converts an unsigned decimal integer to a string with the same content as what std::sprintf(buf, "%llu", value) would produce for sufficiently large buf.
7,8) Converts a floating point value to a string with the same content as what std::sprintf(buf, "%f", value) would produce for sufficiently large buf.
9) Converts a floating point value to a string with the same content as what std::sprintf(buf, "%Lf", value) would produce for sufficiently large buf.

Contents

Parameters

value - a numeric value to convert

Return value

a string holding the converted value

Example

Run this code
#include <iostream>
#include <string>
 
int main() 
{
    double f = 23.43;
    std::string f_str = std::to_string(f);
    std::cout << f_str << '\n';
}

Output: 

23.430000

See also

(C++11)
 converts an integral or floating-point value to wstring
(function) [edit]
(C++11)(C++11)
 converts a string to an unsigned integer
(function) [edit]
(C++11)(C++11)(C++11)
 converts a string to a signed integer
(function) [edit]
(C++11)(C++11)(C++11)
 converts a string to a floating point value
(function) [edit]
Retrieved from "https://en.cppreference.com/mwiki/index.php?title=cpp/string/basic_string/to_string&oldid=71079"