//動態配置結構陣列，
//先輸入人數，再依序輸入n個人的姓名、身高、體重
//輸出身高及體重平均
//輸出身高或體重任一項低於平均的人姓名

#include <stdio.h>
#include <stdlib.h>

struct student{
        char name[21]; 
		int height, weight;
	};

int main(){
	int i, n;
	double t = 10000.00;
	double s = 10000.00;
    double sum_height, sum_weight, Height_avg, Weight_avg;
	sum_height = 0;
	sum_weight = 0;

	printf("請輸入人數: \n"); 
    scanf("%d", &n);

	struct student *a = (struct student *)malloc(sizeof(struct student)*n);

	for (i = 0; i < n; i++){
        printf("請輸入姓名:\n");
        scanf("%s",a[i].name);
        printf("請輸入身高:\n");
        scanf("%d",&a[i].height);
        printf("請輸入體重:\n");
        scanf("%d",&a[i].weight);
    }

	for (i = 0; i < n; i++){
    sum_height += a[i].height;
	sum_weight += a[i].weight;
	}

	Height_avg = sum_height / n;
	Weight_avg = sum_weight / n;

	printf("H_avg: %.2lf\n", Height_avg);
	printf("W_avg: %.2lf\n", Weight_avg);

    for (i = 0; i < n; i++){
		if(a[i].height < Height_avg || a[i].weight < Weight_avg){
			printf("%s\n", a[i].name);
		}
	}

	free(a);
	system("pause");
	return 0;
}