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std::to_string

From cppreference.com
< cpp‎ | string‎ | basic string
 
 
 
std::basic_string
 
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

[edit] Parameters

value - a numeric value to convert

[edit] Return value

a string holding the converted value

[edit] Example

#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

[edit] See also

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]