# include <stdio.h>

void main()
{
	int num;
	/* 聲明子函數 */
	void average(float *point, int n);
	void search(float(*point)[4], int n);

	/* 定義一個靜態存儲數組并賦初值 */
	static float score[4][4] = {{76, 90, 92, 87}, {68, 78, 69, 94},  
	                            {89, 82, 81, 60}, {81, 68, 60, 97}};

	printf("班級的總平均分：");
	average(*score, 16);    /* 調用函數average求12個分數的平均分 */
	printf("請輸入學生的學號(0-3)：");
	scanf("%d", &num);
	search(score, num);    /* 求出第四個學生的成績 */
}

/* 子函數定義 */
void average(float *point, int n)
{
	float *p_end;
	float aver;
	float sum = 0;
	p_end = point + n -1;
	for(; point<=p_end; point++)
		sum = sum + (*point);
	aver = sum/n;
	printf("%5.2f\n", aver);
}

void search(float(*point)[4], int n)
{
	int i;
	for(i=0; i<4; i++)
		printf("%5.2f ", *(*(point+n)+i));
	printf("\n");
}