百练 2714 求平均年龄

题目链接：http://bailian.openjudge.cn/practice/2714

# include <stdio.h>

int main()
{
	int n,i,age;
	float num=0;

	scanf("%d",&n);

	for(i=0;i<n;i++)
	{
		scanf("%d",&age);
		num=num+age;
	}

	printf("%.2f\n",num/n);

	return 0;
}