嵌入式开发C语言学习day13-华清作业7.16

学习笔记

作业

#include <stdio.h>
#include <string.h>

struct Student
{
    int ID;         // 学号
    char name[10];  // 姓名
    char gender[5]; // 性别
    int score;      // 成绩
};

#define MAX 100

void menu();
void input();
void output();
void maxandmin();
void sumandaverage();
void sort();
void search();

int main(int argc, char const *argv[])
{
    while (1)
    {
        int key = 0;
        int x;
        struct Student student[MAX];
        menu();
        printf("请输入你要进行的操作:");
        scanf("%d", &key);
        printf("\n");
        switch (key)
        {
        case 1:
        {
            input(&x, student);
            break;
        }
        case 2:
        {
            output(&x, student);
            break;
        }
        case 3:
        {
            maxandmin(&x, student);
            break;
        }
        case 4:
        {
            sumandaverage(&x, student);
            break;
        }
        case 5:
        {
            sort(&x, student);
            break;
        }
        case 6:
        {
            search(&x, student);
            break;
        }
        case 0:
            return 0;
        }
    }
    return 0;
}

// 菜单
void menu()
{
    printf("\t\t==>1.录入学生成绩\n");
    printf("\t\t==>2.查看学生成绩\n");
    printf("\t\t==>3.输出最高和最低成绩\n");
    printf("\t\t==>4.输出总成绩和平均成绩\n");
    printf("\t\t==>5.对学生成绩进行排序\n");
    printf("\t\t==>6.查找学生名字\n");
    printf("\t\t==>0.退出\n");
};

// 录入学生成绩
void input(int *x, struct Student *student)
{
    printf("请输入要录入的学生的个数:");
    scanf("%d", x);
    printf("\n");
    for (int i = 0; i < *x; i++)
    {
        printf("请输入第%d个学生的学号:", i + 1);
        scanf("%d", &(student + i)->ID);
        printf("请输入第%d个学生的姓名:", i + 1);
        scanf("%s", (student + i)->name);
        printf("请输入第%d个学生的性别:", i + 1);
        scanf("%s", (student + i)->gender);
        printf("请输入第%d个学生的成绩:", i + 1);
        scanf("%d", &(student + i)->score);
    }
    printf("\n");
};

// 输出学生成绩
void output(int *x, struct Student *student)
{
    for (int i = 0; i < *x; i++)
    {
        printf("第%d个学生的学号:%d 姓名:%s 性别:%s 成绩:%d\n",
               i + 1, (student + i)->ID, (student + i)->name,
               (student + i)->gender, (student + i)->score);
    }
    printf("\n");
};

// 输出最高最低成员的成绩
void maxandmin(int *x, struct Student *student)
{
    int max = 0, min = 1000;
    struct Student maxstudent, minstudent;
    for (int i = 0; i < *x; i++)
    {
        if ((student + i)->score > max)
        {
            max = (student + i)->score;
            maxstudent = *(student + i);
        }
        if ((student + i)->score < min)
        {
            min = (student + i)->score;
            minstudent = *(student + i);
        }
    }
    printf("最高成绩学生学号:%d 姓名:%s 性别:%s 成绩:%d\n", maxstudent.ID, maxstudent.name, maxstudent.gender, maxstudent.score);
    printf("最低成绩学生学号:%d 姓名:%s 性别:%s 成绩:%d\n", minstudent.ID, minstudent.name, minstudent.gender, minstudent.score);
    printf("\n");
};

// 输出总成绩和平均成绩
void sumandaverage(int *x, struct Student *student)
{
    int sum = 0, average = 0;
    for (int i = 0; i < *x; i++)
    {
        sum = sum + (student + i)->score;
    }
    average = sum / (*x);
    printf("总成绩:%d,平均成绩:%d\n", sum, average);
    printf("\n");
};

// 对学生成绩进行排序
void sort(int *x, struct Student *student)
{
    int key1;
    printf("升序请输入 1 降序请输入 2:");
    scanf("%d", &key1);

    for (int i = 0; i < *x; i++)
    {
        for (int j = 0; j < *x - i - 1; j++)
        {
            if (key1 == 1)
            { // 升序
                if ((student + j)->score > (student + j + 1)->score)
                {
                    struct Student temp = *(student + j);
                    *(student + j) = *(student + j + 1);
                    *(student + j + 1) = temp;
                }
            }
            else if (key1 == 2)
            { // 降序
                if ((student + j)->score < (student + j + 1)->score)
                {
                    struct Student temp = *(student + j);
                    *(student + j) = *(student + j + 1);
                    *(student + j + 1) = temp;
                }
            }
        }
    }
    for (int i = 0; i < *x; i++)
    {
        printf("第%d个学生的学号:%d 姓名:%s 性别:%s 成绩:%d\n",
               i + 1, (student + i)->ID, (student + i)->name,
               (student + i)->gender, (student + i)->score);
    }
    printf("\n");
    
}

// 查找学生名字
void search(int *x, struct Student *student)
{
    char name1[10];
    printf("请输入要查找的学生的名字:");
    scanf("%s", name1);
    for (int i = 0; i < *x; i++)
    {
        int result = strcmp(name1, (student + i)->name);
        if (result == 0)
        {
            printf("这个学生存在\n");
        }
    }
    printf("\n");
};