#include <stdio.h>
#include <stdlib.h>
main()
{
struct student
{
int id;
float height;
int weight;
float bmi;
};
struct student a, b, c, d;
a.height=1.7;
a.weight=60;
b.height=1.75;
b.weight=60;
c.height=1.8;
c.weight=60;
d.height=1.9;
d.weight=60;
a.bmi= a.weight/(a.height*a.height);
b.bmi= b.weight/(b.height*b.height);
c.bmi= c.weight/(c.height*c.height);
d.bmi= d.weight/(d.height*d.height);
printf("%5.2f\n",(a.bmi+b.bmi+c.bmi+d.bmi)/4);
system("pause");
}
