#include <stdio.h>

struct Body{
int id;
int height;
int weight;
double bmi;
};

int main(void)
{
struct Body data[]={{1,170,60},{2,150,50},{3,160,56},{4,180,70}};
for(int i=0;i<4;i++){
data[i].bmi=data[i].weight/(data[i].height/100)/(data[i].height/100);
printf("id %d :%lf\n",data[i].id,data[i].bmi);
}
	
	return 0;
}