程序代码：

#include<stdio.h>
#include<string.h>
struct student
{
    int num;
    char name[20];
    char sex;
    float score;
};

int main()
{
    struct student a;
    struct student *p;
    p = &a;
    a.num = 10101;
    strcpy_s(a.name, "Li Lin");
    a.sex = 'M';
    a.score = 95;
    printf("%d %s %c %5.2f\n", (*p).num, (*p).name, (*p).sex, (*p).score);
    return 0;
}