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From: Keith Thompson <Keith.S.Thompson+u@gmail.com>
Newsgroups: comp.lang.c++
Subject: Re: rational numbers
Date: Wed, 22 Sep 2021 07:18:18 -0700
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Bart <bc@freeuk.com> writes:
[...]
>   #include <iostream>
>
>   int main()
>   {   std::string s="";
>       char t[100];
>
>       for (int i=1; i<=10000000; ++i) {
>           s += itoa(i,t,10);
>           s += ' ';
>       }
>
>       std::cout << "S.size = " << s.size() << "\n";
>   }
>
> Compiled as g++ -O2, this runs in 1.3 seconds on my machine. My script
> language might take only twice as long, but is much simpler and
> quicker to write.

I'm a little surprised that compiles.  It doesn't on my Linux system,
but it does under Cygwin (but fails with "g++ -std=c++11 -pedantic").

itoa() is non-standard, and apparently it's provided by newlib (Cygwin)
but not by GNU libc (most Linux systems).

std::to_string() (introduced in C++11) is the C++ equivalent.

-- 
Keith Thompson (The_Other_Keith) Keith.S.Thompson+u@gmail.com
Working, but not speaking, for Philips
void Void(void) { Void(); } /* The recursive call of the void */