题目是要输入班级每个人分数，然后输出最高分，最低分，平均分，必须用指针实现，而且只能有一个函数
编译时没有错误，但是一运行就有错误报告

#include<stdio.h>
int main()
{
    void deal_with(int a,int *p_a,int *p_ma,int *p_mi,float *p_ave);
    int n,a[30],i,max,mini;
    float average,*pointer_ave;
    int *pointer_a,*pointer_max,*pointer_min;
    printf("Please input the number of student\n");
    scanf("%d",&n);
    printf("Please input the score\n");
    for(i=0;i<n;i++)
    {
        scanf("%d",&a[i]);
    }
    pointer_a = a;
    pointer_max = &max;
    pointer_min = &mini;
    pointer_ave = &average;
    deal_with(n,pointer_a,pointer_max,pointer_min,pointer_ave);
    printf("%d,%d,%f\n",max,mini,average);
    return(0);
}

void deal_with(int a,int *p_a,int *p_ma,int *p_mi,float *p_ave)
{
    int sum=0,max=0,mini=0;
    for(max=*p_a,mini=*p_a;p_a<p_a+a;p_a++)
    {
        if(*p_a >= max)
        {
            max=*p_a;
        }
        if(*p_a <= mini)
        {
            mini=*p_a;
        }
        sum=sum+*p_a;
    }
    *p_ma=max;
    *p_mi=mini;
    *p_ave=sum/(float)a;
     
}