学生成绩（c语言）

#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
int main()
{
	int i,j,n,t,a[100];
	int sum = 0,ping,you=0,liang=0,zhong=0,cha=0;
	printf("请输入n位同学的成绩：\n");
	scanf("%d", &n);
	for (i = 0; i < n; i++)
	{
		scanf("%d", &a[i]);
		sum = sum + a[i];
	}
	ping = sum/n;
	printf("这%d位同学的平均成绩为%d\n",n,ping);
	//气泡法
	for(j=0;j<n-1;j++)
		for(i=0;i<n-1-j;i++)
			if (a[i] > a[i + 1])
			{
				t = a[i];
				a[i] = a[i + 1];
				a[i + 1] = t;
			}
	printf("这%d位同学的最高分为%d\n", n, a[n-1]);
	printf("这%d位同学的最低分为%d\n", n, a[0]);
	for (i = 0;i<n; i++)
	{
		if (a[i] >= 90 && a[i] <= 100)
			printf("%d优秀\n",a[i]);
		else if (a[i] >= 75 && a[i] < 90)
			printf("%d优良\n",a[i]);
		else if (a[i] >= 60 && a[i] < 75)
			printf("%d中等\n",a[i]);
		else if (a[i] >= 0 && a[i] < 60)
			printf("%d差\n",a[i]);
	}
	return 0;
}