2013/2/15 Jim Michaels <[email protected]>
> #include <string>
> #include <iostream>
> #include <stdint.h>
> int main(void) {
> int64_t n=5;
> std::string s=std::to_string(n); //
> http://www.cplusplus.com/reference/string/to_string/
> std::cout<<s;
> return 0;
> }
> Thu 02/14/2013 23:16:40.04||E:\prj\createfile\createfile-3.28\tests|>type
> "errto_string"
> to_string.cpp: In function 'int main()':
> to_string.cpp:6:16: error: 'to_string' is not a member of 'std'
>
Preliminary note: you do not need to call this function to put an integer
into a [f|string]stream. std::to_string is only useful if you need the
std::string object for something else later.
The function was not available on MinGW-w64 before GCC 4.8 (4.7.3pre?) and
without current MinGW-w64 trunk. JonY made the necessary changes not so
long ago. Why there was never a simple fallback in libstdc++ that used a
temporary std::stringstream is beyond me though. This is what you can do if
it's not available:
http://liveworkspace.org/code/3PIOlS$5
The stringstream is not as efficient as a decent implementation based on
some printf or manual processing, but as libstdc++ relies on POSIX printf
and JonY only fixed that stuff in MinGW-w64 trunk and some as-of-yet
unreleased GCC version (4.7.3? and 4.8), this is a valid workaround.
Also: use <cstdint> instead of <stdint.h> (see link above).
Cheers,
Ruben
>
> -------------
> Jim Michaels
> [email protected] <[email protected]>
> [email protected]
> http://
> <http://renewalcomputerservices.com/>RenewalComputerServices.com<http://renewalcomputerservices.com/>
> http://JesusnJim.com <http://jesusnjim.com/> (my personal site, has
> software)
> ---
> IEC Units: Computer RAM & SSD measurements, microsoft disk size
> measurements (note: they will say GB or MB or KB or TB when it is IEC
> Units!):
> [KiB] [MiB] [GiB] [TiB]
> [2^10B=1,024^1B=1KiB]
> [2^20B=1,024^2B=1,048,576B=1MiB]
> [2^30B=1,024^3B=1,073,741,824B=1GiB]
> [2^40B=1,024^4B=1,099,511,627,776B=1TiB]
> [2^50B=1,024^5B=1,125,899,906,842,624B=1PiB]
> SI Units: Hard disk industry disk size measurements:
> [KB] [MB] [GB] [TB]
> [10^3B=1,000B=1KB]
> [10^6B=1,000,000B=1MB]
> [10^9B=1,000,000,000B=1GB]
> [10^12B=1,000,000,000,000B=1TB]
> [10^15B=1,000,000,000,000,000B=1PB]
>
>
>
> ------------------------------------------------------------------------------
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