RE: [Dev-C++] stl accumulate question

[Ioannis V. <no...@ho...>]

> -----Original Message-----
> From: dev...@li... 
> [mailto:dev...@li...] On Behalf 
> Of h.r...@gm...
> Sent: Thursday, September 05, 2002 1:20 AM
> To: dev...@li...
> Subject: [Dev-C++] stl accumulate question
> 
> 
> Hi list,
> 
> i want to replace the following code:
> 
> typedef vector<double>::iterator it;
>   
> for(it i = TMW.begin(); i != TMW.end(); i++) { 
>   sx   += *i;
>   sxx += sqr(*i); 
> }
>     
> with
>   
>     sx  = accumulate(TMW.begin(), TMW.end(), 0.0);
>     sxx = accumulate(TMW.begin(), TMW.end(), 0.0, sqr);
> [...]
> 
> def of sqr:
> 
> template<class T> 
>   inline T sqr(T x) { return x * x; }
> 
> but sxx = .... does not compile.
> 
> The error message:
> 55 E:\dev\dev-c++\proj2\procabi.cpp
> no matching function for call to `accumulate (double *, 
> double *, double,
> {unknown type})'
> 
> Why that ???


#include <numeric>



Ioannis

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