simple for loop on g++ 4.4.3

[Jonathan Wakely]

On 28 October 2010 23:41, eric lin wrote:
>  you can see both programs, their for loop are very similar(or the same)
> for (int i=0
> but why first , and second programs can not compile
> but
> the third one is OK
> ?

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Your first  and second examples are not valid C++, the error tells you
why.  The variable 'i' is declared in the for-loop and is not in scope
after the loop.