/*Description
Enter the height (meters) of 5 people from the keyboard and find their average height (meters).
Input description:
In one line, enter 5 heights in a row (range 0.00~2.00), separated by spaces.
Output description:
One line, output the average height, retaining two decimal places*/
#include<stdio.h>
int main()
{
double a = 0, b = 0, c = 0, d = 0, e = 0, avg = 0;
scanf("%lf%lf%lf%lf%lf", &a, &b, &c, &d, &e);
avg = (a + b + c + d + e) / 5;
printf("%.2lf", avg);
return 0;
}
/*If you enter more than 5 questions, but enter hundreds or thousands of numbers, it will be very troublesome. We will optimize the code*/
#include<stdio.h>
int main()
{
double a = 0,sum=0;
int i=0;
while (i < 5)//i控制循环次数，5个人i就是5，1000个人i就是1000
{
scanf_s("%lf", &a);
sum = sum + a;//每次输入都将输入的数加到一起
i++;
}
printf("%.2lf", sum / 5);
return 0;
}