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这是为啥？？？？

Posted by pdamirain at 2014-12-18 14:12:46 on Problem 2049
In Reply To:cin和scanf的差别！！！ Posted by:changzhiwin at 2009-03-13 20:33:01 
> 输入x1，y1的两种方法：
> 1，scanf("%lf%lf",&x1,&y1)----------------WA
> 2，cin>>x1>>y1;---------------------------AC
> 本人可是找了很久，偶然间发现
> 当然使用C++提交才会出现这种错误，用G++就不会出现
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