程序代码：

# include<stdio.h>
# include<windows.h>
# include<malloc.h>


struct stu
{
    char name;
    char sex;
    int age;
    int score;
};

void input(struct stu * p, int len)
{
    for (int i = 0; i < len; ++i)
    {
        printf("输入%d组数据：", i + 1);

        printf("\n输入姓名：");
        printf("\n输入性别：");
        printf("\n输入年龄：");
        printf("\n输入分数:\n");
        
        scanf("%c %c %d %d", &p[i].name, &p[i].sex, &p[i].age, &p[i].score);

    };
};

void output(struct stu * q, char * r)
{
    printf("  姓名：%c\n", q[*r].name);
    printf("  性别：%c\n", q[*r].sex);
    printf("  年龄：%d\n", q[*r].age);
    printf("  分数：%d\n", q[*r].score);

}

int main(void)
{
    int len;    /*此为数据个数*/
    printf("\n输入即将录入的数据个数：");
    scanf("%d", &len);
    
    struct stu * student = (struct stu *)malloc(sizeof(struct stu) * len);    /*定义x为动态数组*/
    
    input(student, len);    /*此为输入通道*/
    
    printf("\n输入你想要的第几组数据：");
    char y;    /*此为输出通道*/
    scanf("%c", &y);
    output(student, &y);
    
    
    system("pause");
    return 0;
}