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我晕了,找了好多遍不知道哪错,帮看看,谢谢

Posted by omepu at 2006-01-04 16:16:35 on Problem 1004
用的C++,但是cout<<setpresicion(2)<<sumn<<endl;不好使。

现在这个样子帮我看看哪不行啊?

#include <iostream>
using namespace std;

int main()
{
	double sumn = 0 , month;
	int i = 1;
	while (i <= 12)
	{
		cin >> month;
		sumn = sumn + month;
		++i;
	}
	sumn = sumn / i + 0.05;
	printf("$%.2f\n" , sumn);
	return 0;
}

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