程序代码：

#include <stdio.h>
double fun1(double *p1);
double fun2(double *p2);
int main()
{
    double ss[3][5]={{1,2,3,4,5},{6,7,8,9,10},{11,12,13,14,15}};
    double (*p)[5];
    p=ss;
    printf("第一组数平均值=%.1f\n", fun1(p));
    printf("第二组数平均值=%.1f\n", fun1(p+1));
    printf("第三组数平均值=%.1f\n", fun1(p+2));
    printf("第一组数最大值=%.1f\n", fun2(p));
    printf("第二组数最大值=%.1f\n", fun2(p+1));
    printf("第三组数最大值=%.1f\n", fun2(p+2));
    m = 100 / 20;
    printf("%d\n     ",m);
    return 0;
}
double fun1(double *p1)
{
    double s = 0, k = 0;
    for (int i = 0; i < 5; i++)
    {
        s += *p1;
    }
    k = s / 5;
    return k;
}
double fun2(double *p2)
{
    int i=0, is=0;
    double m = 0;
        for (int i = 0; i < 5; i++)
        {
            if (m < *p2)
            {
                m = *p2;
            }

        }
    return m;
}