Re: [cpp] std::cout 为啥和 printf 的结果不一致

[Jack]

是不是和你设置了cout的精度有关呢。

在07-11-1，jinq0123 at 163.com <jinq0123 at 163.com> 写道：
>
> 用stlport就输出一致，应该是库的错误。恭喜你找到一个BUG。
>
> Xu Ziding wrote:
> > 代码如下：
> >       double d = 123456789e300;
> >       std::cout.precision(0);
> >       std::cout << std::fixed << d << std::endl;
> >       printf("%f\n", d );
> > 我的VC7.1，DEBUG编译输出如下：
> >
> 123456789000000010000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000.000000
> >
> 123456789000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000.000000
> > RELEASE：
> >
> 123456789000000170000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000.000000
> >
> 123456789000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000.000000
> >
> > 为啥数大了之后，printf和流输出的值还不一样啊？而且debug和release的版本的输出也不一样呢？
> >
> >                                           ZiDing
> >
> >                                             10.29
> >
> >
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>
> --
> 金庆
>
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