#include <stdio.h>
int main(void)
{
int score = 0; //成绩
int sum = 0; //求和
double ave = 0.0; //平均值
int max = 0, min = 101;
int i = 0; //计数器
while(scanf("%d", &score) != EOF)
{
//求和、求最大最小
i++;
sum += score;
max = score > max? score: max;
min = score < min? score: min;
if(7 <= i) //七个成绩
{
sum -= max + min;
ave = (double)sum / 5.0;
printf("%.2lf\n", ave); //打印
//重置
i = sum = ave = 0;
max = 0;
min = 101;
}
}
return 0;
}

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