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请高手看下,为什么不能AC啊,但运行可以啊

Posted by 0710321105 at 2009-03-12 21:03:17 on Problem 1004
#include<iostream>
#include<iomanip>
using namespace std;
int main()
{
	 float sum=0;
	 float ave=0;
	 float a[12];
	 for(int i=0;i<12;i++)
	 {
		 cin>>setiosflags(ios::fixed)>>setprecision(2)>>a[i];
		 sum+=a[i];
	 }
	 ave=sum/12;
	 cout<<setiosflags(ios::fixed)<<setprecision(2)<<ave;
	 return 0;
}

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