\(\newcommand{\W}[1]{ \; #1 \; }\) \(\newcommand{\R}[1]{ {\rm #1} }\) \(\newcommand{\B}[1]{ {\bf #1} }\) \(\newcommand{\D}[2]{ \frac{\partial #1}{\partial #2} }\) \(\newcommand{\DD}[3]{ \frac{\partial^2 #1}{\partial #2 \partial #3} }\) \(\newcommand{\Dpow}[2]{ \frac{\partial^{#1}}{\partial {#2}^{#1}} }\) \(\newcommand{\dpow}[2]{ \frac{ {\rm d}^{#1}}{{\rm d}\, {#2}^{#1}} }\)
to_string¶
View page sourceConvert Certain Types to a String¶
Syntax¶
#
include <cppad/utility/to_string.hpp>
s = to_string ( value ) .
See Also¶
Purpose¶
This routine is similar to the C++11 routine std::to_string
with the following differences:
It works with C++98.
It has been extended to the fundamental floating point types.
It has specifications for extending to an arbitrary type; see base_to_string .
If
<cppad/cppad.hpp>is included, and it has been extended to a Base type, it automatically extends to the AD types above Base .For integer types, conversion to a string is exact. For floating point types, conversion to a string yields a value that has relative error within machine epsilon.
value¶
Integer¶
The argument value can have the following prototype
constInteger & value
where Integer is any of the fundamental integer types; e.g.,
short int and unsigned long .
Note that if C++11 is supported by this compilation,
unsigned long long is also a fundamental integer type.
Float¶
The argument value can have the following prototype
constFloat & value
where Float is any of the fundamental floating point types; i.e.,
float , double , and long double .
s¶
The return value has prototype
std::strings
and contains a representation of the specified value .
Integer¶
If value is an Integer ,
the representation is equivalent to os << value
where os is an std::ostringstream .
Float¶
If value is a Float ,
enough digits are used in the representation so that
the result is accurate to withing round off error.
Example¶
The file to_string.cpp contains an example and test of this routine.