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Re:今天才知道 printf("%.3f",result ); 本来就有四舍五入的功能，太弱了， 我竟然写出。。。。。。

Posted by 0801050332 at 2010-07-22 09:15:53 on Problem 1191
In Reply To:今天才知道 printf("%.3f",result ); 本来就有四舍五入的功能，太弱了， 我竟然写出。。。。。。 Posted by:fantasyorg at 2008-07-12 13:15:30 
>       
>          int first = result * 10000;
> 	if ( first % 10 < 5 )
> 		first = first / 10;
> 	else
> 		first = first / 10 + 1;
> 
> 	int second = first % 1000;
> 	cout << first / 1000 << '.' << second;
> 
>楼主你不知道,
>cout.setf(ios::fixed);
>cout<<setprecision(3)<<nResult<<endl;
>就OK吗?
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