第六阶段—typedef关键字详解：定义一个结构体数组，for循环按照分数从小到大排序，并打印出学生信息

#include<stdio.h>
typedef struct{
    char name[20];
    int id;
    int score;
}student; 
    
student st[3] = {
    {"jack",1,100},
        {"rose",2,80},
            {"shen",3,70}
};
student *p = st;

void sort_student(student *p,int n)//更换变量的值，形参要用指针
{
    int i = 0,j = 0;
    student    temp;
    for(i = 0; i <n-1; i++)//总体循环3次
    {
        for(j = 0; j < n-1-i; j++)//每次循环选出最大值，放在数组最后
        {
            if(p[j].score > p[j +1].score)//表示分数的变量p[j].score
            {
                temp = p[j];
                p[j] = p[j+1];
                p[j +1] = temp;            
            }
        }
    }
    return;
}

void output_student(student s)
{
    printf("name\tid\tscore\t\n");
    printf("%s\t%d\t%d\t\n",s.name, s.id, s.score);
    
    // printf("name:%s\n",s.name);
    // printf("id:%d\n",s.id);
    // printf("score:%d\n", s.score);
    return;
}
void out_student(student *p)
{
    int i;
    for(i = 0; i < 3; i++)
    {
        output_student(p[i]);//输出变量的形式是p[i]
    }
    
    return;
}

int main(int argc, const char *argv[])
{
    //input_student(st);
    sort_student(p,3);
    out_student(st);
    
    return 0;
}