学生信息输入、排序、输出（结构体指针和函数的使用）

---

一、学生信息输入、排序、输出

/*
    20202020,"xiaoming",20,80.8,\
    20202016,"xiaohong",21,60.8,\
    20202022,"daye",26,59.8,\
    20202006,"gousheng",19,82.8,\
    20202100,"deshan",20,70,\
*/ 
#include <stdio.h>
#include <strings.h>
#define N 5
//结构体为全局变量，定义在函数声明前
typedef struct stu
{
    long num;
    char name[12];
    int age;
    float score;
}STU;

void stuPrint(STU *s);
void stuSort(STU *ptr1);
void stuInput(STU *s);
int main(int argc, char const *argv[])
{
    STU s[N];  
    stuInput(s);//s就是结构体数组的地址
    stuSort(s);
    stuPrint(s);
    return 0;
}
void stuInput(STU *s)//输入
{
    for (int i = 0; i < N; i++)
    {
        scanf("%ld-%s-%d-%f\n",&s[i].num,s[i].name,&s[i].age,&s[i].score);
    }
}
void stuSort(STU *ptr1)//排序
{
    struct stu *ptr = ptr1;
    STU s1;
    bzero(&s1,sizeof(s1));

    for (int  i = 0; i < N; i++)
    {
        for (ptr =ptr1; ptr != &ptr1[N]-1-i; ptr++)
        {
            if (ptr->num > (ptr+1)->num)
            {
                s1 = *ptr;
                *ptr = *(ptr+1);
                *(ptr+1) = s1;
            }         
        }       
    }
}
void stuPrint(STU *s)//输出
{
    for (int i = 0; i < N; i++)
    {
        printf("%ld-%s-%d-%f\n",s[i].num,s[i].name,s[i].age,s[i].score);
    }
}