对每个班级，要输出一行学生成绩超出平均分的百分比，后面保留三位小数。

For each case you are to output a line giving the percentage of students whose grade is above average, rounded to 3 decimal places.

youdao

基于数字温度传感器ds18b20的测温仪设计，三位数码管显示温度值，保留小数点后一位。

Digital temperature sensor based on the thermometer DS18B20 design, the three digital display temperature, keep one decimal place.

youdao