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C语言课程设计||学生管理系统（简单版，超详细，看这一篇就够了）_学生管理系统c语言代码

作者：我家小花儿 | 2024-07-03 13:33:39

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学生管理系统c语言代码

前言

嗨嗨嗨！！这里是是等等(｡･∀･)ﾉﾞ经过大一上学期的学习，老师希望我们能运用所学知识来编写一个学生管理系统，我也是磕磕碰碰完成啦。代码呢，总共500来行，用链表做的，总体是跟着视频来的，链接我放在后面啦，需要的小伙伴可以去看看（视频里用到的编译器是VS，我用到的编译器是CLion，所以可能有的地方不太一样）。那么来看看代码吧(ง •_•)ง

一、需求分析

我也是挑了一个比较简单的，但是功能还是很全的o(￣▽￣)o

一个学生通讯管理系统，学生信息包括职学号、姓名、班级、住址、电话、QQ，其中学号不重复。该系统具有以下功能：
(1)学生通讯信息录入（储存在文件中）；
(2)学生通讯信息浏览；
(3)查询功能:包括按学号查询、按姓名查询，按班级查询；
(4)学生通讯信息删除：按学号删除、按姓名删除；
(5)学生通讯信息修改：按学号修改、按姓名修改；
(6)学生通讯信息排序：按学号升序、按学号降序；
(7)学生通讯信息统计：统计各班人数、统计各省份人数；

二、代码解析

1、总体框架

定义一个结构体存放学生通讯信息；定义节点，节点的数据域为存放学生信息的结构体；创建节点和创建表单独写一个函数，方便调用；

#include<stdio.h>
#include <stdlib.h>
#include <string.h>
#define N 6 //班级数量

//数据设计
struct student{
    int num;
    char name[20];
    int class;
    char addr[50];
    char tel[20];
    char QQ[50];
};

struct Node{
    struct student data;
    struct Node *next;
};
//创建表
struct Node *createList(){
    struct Node* headNode = (struct Node*)malloc(sizeof(struct Node));
    headNode->next = NULL;
    return headNode;
}
//创建节点
struct Node *createNode(struct student data){
    struct Node* newNode = (struct Node*)malloc(sizeof(struct Node));
    newNode->data = data;
    newNode->next = NULL;
    return newNode;
}
//函数声明
void menu();//菜单
void keyDown();//用户交互
void keydown1();//用户交互
void keydown2();//用户交互
void keydown3();//用户交互
void keydown4();//用户交互
void keydown5();//用户交互
void insertNodeByHead(struct Node* headNode,struct student data);//1.录入
void printList(struct Node* headNode);//2.浏览
void searchInfoByNum(struct Node* headNode,int num);//3.按学号查询
void searchInfoByName(struct Node* headNode,char *name);//3.按名字查询
void searchInfoByClass(struct Node* headNode,int class);//3.按班级查询
void deleteNumNode(struct Node* headNode,int num);//4.按学号删除
void deleteNameNode(struct Node* headNode,char *name);//4.按姓名删除
void alterNumNode(struct Node* headNode,int num);//5.按学号修改
void alterNameNode(struct Node* headNode,char* name);//5.按姓名修改
void sortUp(struct Node* headNode);//6.按学号升序排序
void sortDrop(struct Node* headNode);//6.按学号降序排序
void countClass(struct Node* headNode);//7.统计各班人数
void countProvince(struct Node* headNode);//7.统计各省份人数
void readInFromFile(struct Node* headNode,char* filename);//文件读操作
void writeInFromFile(struct Node* headNode,char* filename);//文件写操作

struct Node* list = NULL;//创建链表，在主函数内赋值

int main()
{
    list = createList();
    readInFromFile(list,"student.txt");
    while (1)
    {
        menu();
        keyDown();
        system("pause");
        system("cls");
    }
}
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2、菜单和用户交互

这里就没什么可说的啦，为了方便大家理解，我做了个树状图_(￣▽￣)*

在这里插入图片描述

//菜单
void menu(){
    printf("****************【学生通讯录管理系统】**************\n");
    printf("*\t\t1.学生通讯信息录入                 *\n");
    printf("*--------------------------------------------------*\n");
    printf("*\t\t2.学生通讯信息浏览                 *\n");
    printf("*--------------------------------------------------*\n");
    printf("*\t\t3.查询功能                         *\n");
    printf("*--------------------------------------------------*\n");
    printf("*\t\t4.学生通讯信息删除                 *\n");
    printf("*--------------------------------------------------*\n");
    printf("*\t\t5.学生通讯信息修改                 *\n");
    printf("*--------------------------------------------------*\n");
    printf("*\t\t6.学生通讯信息排序                 *\n");
    printf("*--------------------------------------------------*\n");
    printf("*\t\t7.学生通讯信息统计                 *\n");
    printf("*--------------------------------------------------*\n");
    printf("*\t\t0.退出系统                         *\n");
    printf("****************************************************\n");
}
//用户交互
void keyDown(){
    struct student data;
    int choice = 0;
    scanf("%d",&choice);
    switch(choice){
        case 0:
            printf("正常退出。");
            system("pause");
            exit(0);
            break;
        case 1:
            printf("----------------【学生通讯信息录入】----------------\n");
            printf("请输入学生的学号，姓名，班级，地址，电话，QQ:\n");
            fflush(stdin);
            scanf("%d %s %d %s %s %s",&data.num,data.name,&data.class,data.addr,data.tel,data.QQ);
            insertNodeByHead(list,data);
            printf("录入成功！\n");
            break;
        case 2:
            printf("----------------【学生通讯信息浏览】----------------\n");
            printList(list);
            break;
        case 3:
            printf("----------------【查询功能】----------------\n");
            printf("\t\t1.按学号查询\n");
            printf("\t\t2.按姓名查询\n");
            printf("\t\t3.按班级查询\n");
            keydown1();
            break;
        case 4:
            printf("----------------【学生通讯信息删除】----------------\n");
            printf("\t\t1.按学号删除\n");
            printf("\t\t2.按姓名删除\n");
            keydown2();
            break;
        case 5:
            printf("----------------【学生通讯信息修改】----------------\n");
            printf("\t\t1.按学号查找并修改\n");
            printf("\t\t2.按姓名查找并修改\n");
            keydown3();
            break;
        case 6:
            printf("----------------【学生通讯信息排序】----------------\n");
            printf("\t\t1.按学号升序排序\n");
            printf("\t\t2.按学号降序排序\n");
            keydown4();
            break;
        case 7:
            printf("----------------【学生通讯信息统计】----------------\n");
            printf("\t\t1.统计各班人数\n");
            printf("\t\t2.统计各省份人数\n");
            keydown5();
            break;
        default:
            printf("选择错误，请重新输入......\n");
            system("pause");
    }
    writeInFromFile(list,"student.txt");
}
void keydown1(){
    int choice = 0;
    scanf("%d",&choice);
    struct student data;
    switch(choice){
        case 1:
            printf("----------------【按学号查询】----------------\n");
            printf("请输入学号：");
            scanf("%d",&data.num);
            searchInfoByNum(list,data.num);
            break;
        case 2:
            printf("----------------【按姓名查询】----------------\n");
            printf("请输入姓名：");
            scanf("%s",data.name);
            searchInfoByName(list,data.name);
            break;
        case 3:
            printf("----------------【按班级查询】----------------\n");
            printf("请输入班级：");
            scanf("%d",&data.class);
            searchInfoByClass(list,data.class);
            break;
        default:
            printf("选择错误，请重新输入......\n");
            system("pause");
            break;
    }
}
void keydown2(){
    struct student data;
    int choice = 0;
    scanf("%d",&choice);
    switch(choice){
        case 1:
            printf("----------------【按学号删除】----------------\n");
            printf("请输入删除学生的学号：\n");
            scanf("%d",&data.num);
            deleteNumNode(list,data.num);
            break;
        case 2:
            printf("----------------【按姓名删除】----------------\n");
            printf("请输入删除学生的姓名：\n");
            scanf("%s",data.name);
            deleteNameNode(list,data.name);
            break;
        default:
            printf("选择错误，请重新输入......\n");
            system("pause");
            break;
    }
}
void keydown3() {
    struct student data;
    int choice = 0;
    scanf("%d", &choice);
    switch (choice) {
        case 1:
            printf("----------------【按学号查找并修改】----------------\n");
            printf("请输入需要修改学生的学号：\n");
            scanf("%d", &data.num);
            alterNumNode(list, data.num);
            break;
        case 2:
            printf("----------------【按姓名查找并修改】----------------\n");
            printf("请输入需要修改学生的姓名：\n");
            scanf("%s", data.name);
            alterNameNode(list,data.name);
            break;
        default:
            printf("选择错误，请重新输入......\n");
            system("pause");
            break;
    }
}
void keydown4(){
    int choice = 0;
    scanf("%d", &choice);
    switch (choice) {
        case 1:
            printf("----------------【按学号升序排序】----------------\n");
            sortUp(list);
            break;
        case 2:
            printf("----------------【按学号降序排序】----------------\n");
            sortDrop(list);
            break;
        default:
            printf("选择错误，请重新输入......\n");
            system("pause");
            break;
    }
}
void keydown5(){

    int choice = 0;
    scanf("%d", &choice);
    switch (choice) {
        case 1:
            printf("----------------【统计各班人数】----------------\n");
            countClass(list);
            break;
        case 2:
            printf("----------------【统计各省份人数】----------------\n");
            countProvince(list);
            break;
        default:
            printf("选择错误，请重新输入......\n");
            system("pause");
            break;
    }
}
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运行界面
在这里插入图片描述

3、录入和浏览

录入：将学生通讯信息储存在链表中。
浏览：遍历链表。

//录入
void insertNodeByHead(struct Node* headNode,struct student data)
{
    struct Node* newNode = createNode(data);
    newNode->next = headNode->next;
    headNode->next = newNode;
}
//浏览
void printList(struct Node* headNode){
    struct Node* pMove = headNode->next;
    printf("学号\t姓名\t班级\t地址\t电话\t\tQQ\n");
    while (pMove){
        printf("%d\t%s\t%d\t%s\t%s\t%s\n",pMove->data.num,pMove->data.name,pMove->data.class,pMove->data.addr,pMove->data.tel,pMove->data.QQ);
        pMove = pMove->next;
    }
    printf("\n");
}
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运行界面
在这里插入图片描述

在这里插入图片描述

4、查询

遍历链表，如该学生存在，则打印该学生信息，不存在则退出。

//按学号查询
void searchInfoByNum(struct Node* headNode,int num){
    struct Node* pMove = headNode;
    while (pMove){
        if(pMove -> data.num == num){
            printf("学号\t姓名\t班级\t地址\t电话\t\tQQ\n");
            printf("%d\t%s\t%d\t%s\t%s\t%s\n", pMove->data.num, pMove->data.name, pMove->data.class, pMove->data.addr,
                   pMove->data.tel, pMove->data.QQ);
            break;
        }
        pMove = pMove -> next;
    }
    if(pMove == NULL){
        printf("学号不存在，无法查找！\n ");
        return ;
    }

}
//按名字查询
void searchInfoByName(struct Node* headNode,char *name){
    struct Node* pMove = headNode;
    while (pMove){
        if(strcmp(pMove -> data.name,name) == 0){
            printf("学号\t姓名\t班级\t地址\t电话\t\tQQ\n");
            printf("%d\t%s\t%d\t%s\t%s\t%s\n", pMove->data.num, pMove->data.name, pMove->data.class, pMove->data.addr,
                   pMove->data.tel, pMove->data.QQ);
            break;
        }
        pMove = pMove -> next;
    }
    if(pMove == NULL){
        printf("名字不存在，无法查找！\n ");
        return ;
    }
}
//按班级查询
void searchInfoByClass(struct Node* headNode,int class){
    struct Node* pMove = headNode;
    printf("学号\t姓名\t班级\t地址\t电话\t\tQQ\n");
    while (pMove){
        if(pMove -> data.class == class){
            printf("%d\t%s\t%d\t%s\t%s\t%s\n", pMove->data.num, pMove->data.name, pMove->data.class, pMove->data.addr,
                   pMove->data.tel, pMove->data.QQ);
        }
        pMove = pMove -> next;
    }

    if(pMove == NULL){
        printf("班级不存在，无法查找！\n ");
        return ;
    }
}
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运行介面
在这里插入图片描述

5、删除

遍历链表，如存在该学生，释放节点（即删除），不存在则退出。

//按学号删除
void deleteNumNode(struct Node* headNode,int num){
    struct Node* posNode = headNode -> next;
    struct Node* posFrontNode = headNode;
    while(posNode -> data.num != num)
    {
        posFrontNode = posNode;
        posNode = posNode -> next;
    }
    if(posNode == NULL){
        printf("未找学号位置，无法删除！");
        return;
    }
    else{
        posFrontNode -> next = posNode -> next;
        free(posNode);
        printf("删除成功！");
    }

}
//按名字删除
void deleteNameNode(struct Node* headNode,char *name){
    struct Node* posNode = headNode -> next;
    struct Node* posFrontNode = headNode;
    if(posNode == NULL){
        printf("名字不存在，无法删除！\n ");
        return;
    }
    while(strcmp(posNode -> data.name,name))
    {
        posFrontNode = posNode;
        posNode = posNode -> next;
    }
    if(posNode == NULL){
        printf("未找名字位置，无法删除！");
        return;
    }
    else{
        posFrontNode -> next = posNode -> next;
        free(posNode);
        printf("删除成功!");
    }

}
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运行介面
在这里插入图片描述

6、修改

先删除再重新录入，结合删除功能和录入功能。

//按学号修改
void alterNumNode(struct Node* headNode,int num){
    struct Node* posNode = headNode -> next;
    struct Node* posFrontNode = headNode;
    while(posNode -> data.num != num)
    {
        posFrontNode = posNode;
        posNode = posNode -> next;
    }
    if(posNode == NULL){
        printf("未找该学生，无法修改！");
        return;
    }
    else{
        struct student data;
        posFrontNode -> next = posNode -> next;
        free(posNode);
        printf("请重新输入学生的学号，姓名，班级，地址，电话，QQ:\n");
        fflush(stdin);
        scanf("%d %s %d %s %s %s",&data.num,data.name,&data.class,data.addr,data.tel,data.QQ);
        insertNodeByHead(list,data);
        printf("修改成功！");
    }
}
//按姓名修改
void alterNameNode(struct Node* headNode,char* name){
    struct Node* posNode = headNode -> next;
    struct Node* posFrontNode = headNode;
    while(strcmp(posNode -> data.name,name))
    {
        posFrontNode = posNode;
        posNode = posNode -> next;
    }
    if(posNode == NULL){
        printf("未找该学生，无法修改！");
        return;
    }
    else{
        struct student data;
        posFrontNode -> next = posNode -> next;
        free(posNode);
        printf("请重新输入学生的学号，姓名，班级，地址，电话，QQ:\n");
        fflush(stdin);
        scanf("%d %s %d %s %s %s",&data.num,data.name,&data.class,data.addr,data.tel,data.QQ);
        insertNodeByHead(list,data);
        printf("修改成功！");
    }
}
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运行界面
在这里插入图片描述

7、排序

采用了冒泡排序法。

//按学号升序排序
void sortUp(struct Node* headNode){
    struct Node* turn;
    struct Node* move;
    struct student temp;
    for(turn = headNode -> next;turn -> next != NULL;turn = turn -> next){
        for(move = headNode -> next;move -> next != NULL;move = move -> next){
            if(move -> data.num > move -> next -> data.num){
                temp = move -> data;
                move -> data = move -> next -> data;
                move -> next -> data = temp;
            }
        }
    }
    printList(list);
}
//按学号降序排序
void sortDrop(struct Node* headNode){
    struct Node* turn;
    struct Node* move;
    struct student temp;
    for(turn = headNode -> next;turn -> next != NULL;turn = turn -> next){
        for(move = headNode -> next;move -> next != NULL;move = move -> next){
            if(move -> data.num < move -> next -> data.num){
                temp = move -> data;
                move -> data = move -> next -> data;
                move -> next -> data = temp;
            }
        }
    }
    printList(list);
}
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运行介面
在这里插入图片描述

8、统计

遍历链表，定义计数数组，用来存放各班级人数或各省份人数，最后将统计结果输出。

//统计各班级人数
void countClass(struct Node* headNode){
    int i;
    int count[N + 1] = {0};
    struct Node* pMove = headNode;
    while (pMove){
        for( i = 1;i <= N; i++){
            if (pMove->data.class == i ) count[i]++;
        }
        pMove = pMove -> next;
    }
    for (int i = 1;i <= N; i++) {
        printf("%d班的人数为：%d\n",i,count[i]);
    }
}
//统计各省份人数
void countProvince(struct Node* headNode){
    char province[34][100] = {"Hebei","Shanxi","Liaoning","Jilin","Heilongjiang","Jiangsu","Zhejiang","Anhui","Fujian","Jiangxi","Shandong","Henan","Hubei","Hunan","Guangdong","Hannan","Sichuan","Guizhou","Yunnan","Shanxi","Gansu","Qinghai","Taiwan","Neimenggu","Guangxi","Xizang","Ningxia","Xinjiang","Beijiang","Tianjing","Shanghai","Chongqing","Xianggang","Aomen"};
    int i;
    int count[34] ={0};
    struct Node* pMove = headNode;
    while (pMove){
        for( i = 0;i < 34; i++){
            if (strcmp(pMove->data.addr,province[i]) == 0 ) count[i]++;
        }
        pMove = pMove -> next;
    }
    for (int i = 0;i < 34; i++) {
        if(count[i] != 0)
            printf("地址为%s的人数为%d\n",province[i],count[i]);
    }
}
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运行介面
在这里插入图片描述

三、总代码展示

#include<stdio.h>
#include <stdlib.h>
#include <string.h>
#define N 6

//数据设计
struct student{
    int num;
    char name[20];
    int class;
    char addr[50];
    char tel[20];
    char QQ[50];
};

struct Node{
    struct student data;
    struct Node *next;
};
//创建表
struct Node *createList(){
    struct Node* headNode = (struct Node*)malloc(sizeof(struct Node));
    headNode->next = NULL;
    return headNode;
}
//创建结点
struct Node *createNode(struct student data){
    struct Node* newNode = (struct Node*)malloc(sizeof(struct Node));
    newNode->data = data;
    newNode->next = NULL;
    return newNode;
}
//函数声明
void menu();//菜单

void keyDown();//用户交互
void keydown1();//用户交互
void keydown2();//用户交互
void keydown3();//用户交互
void keydown4();//用户交互
void keydown5();//用户交互
void insertNodeByHead(struct Node* headNode,struct student data);//1.录入
void printList(struct Node* headNode);//2.浏览
void searchInfoByNum(struct Node* headNode,int num);//3.按学号查询
void searchInfoByName(struct Node* headNode,char *name);//3.按名字查询
void searchInfoByClass(struct Node* headNode,int class);//3.按班级查询
void deleteNumNode(struct Node* headNode,int num);//4.按学号删除
void deleteNameNode(struct Node* headNode,char *name);//4.按姓名删除
void alterNumNode(struct Node* headNode,int num);//5.按学号修改
void alterNameNode(struct Node* headNode,char* name);//5.按姓名修改
void sortUp(struct Node* headNode);//6.按学号升序排序
void sortDrop(struct Node* headNode);//6.按学号降序排序
void countClass(struct Node* headNode);//7.统计各班人数
void countProvince(struct Node* headNode);//7.统计各省份人数
void readInFromFile(struct Node* headNode,char* filename);//文件读操作
void writeInFromFile(struct Node* headNode,char* filename);//文件写操作

struct Node* list = NULL;

int main()
{
    list = createList();
    readInFromFile(list,"student.txt");
    while (1)
    {
        menu();
        keyDown();
        system("pause");
        system("cls");
    }
}
//菜单
void menu(){
    printf("****************【学生通讯录管理系统】**************\n");
    printf("*\t\t1.学生通讯信息录入                 *\n");
    printf("*--------------------------------------------------*\n");
    printf("*\t\t2.学生通讯信息浏览                 *\n");
    printf("*--------------------------------------------------*\n");
    printf("*\t\t3.查询功能                         *\n");
    printf("*--------------------------------------------------*\n");
    printf("*\t\t4.学生通讯信息删除                 *\n");
    printf("*--------------------------------------------------*\n");
    printf("*\t\t5.学生通讯信息修改                 *\n");
    printf("*--------------------------------------------------*\n");
    printf("*\t\t6.学生通讯信息排序                 *\n");
    printf("*--------------------------------------------------*\n");
    printf("*\t\t7.学生通讯信息统计                 *\n");
    printf("*--------------------------------------------------*\n");
    printf("*\t\t0.退出系统                         *\n");
    printf("****************************************************\n");
}
//用户交互
void keyDown(){
    struct student data;
    int choice = 0;
    scanf("%d",&choice);
    switch(choice){
        case 0:
            printf("正常退出。");
            system("pause");
            exit(0);
            break;
        case 1:
            printf("----------------【学生通讯信息录入】----------------\n");
            printf("请输入学生的学号，姓名，班级，地址，电话，QQ:\n");
            fflush(stdin);
            scanf("%d %s %d %s %s %s",&data.num,data.name,&data.class,data.addr,data.tel,data.QQ);
            insertNodeByHead(list,data);
            printf("录入成功！");
            break;
        case 2:
            printf("----------------【学生通讯信息浏览】----------------\n");
            printList(list);
            break;
        case 3:
            printf("----------------【查询功能】----------------\n");
            printf("\t\t1.按学号查询\n");
            printf("\t\t2.按姓名查询\n");
            printf("\t\t3.按班级查询\n");
            keydown1();
            break;
        case 4:
            printf("----------------【学生通讯信息删除】----------------\n");
            printf("\t\t1.按学号删除\n");
            printf("\t\t2.按姓名删除\n");
            keydown2();
            break;
        case 5:
            printf("----------------【学生通讯信息修改】----------------\n");
            printf("\t\t1.按学号查找并修改\n");
            printf("\t\t2.按姓名查找并修改\n");
            keydown3();
            break;
        case 6:
            printf("----------------【学生通讯信息排序】----------------\n");
            printf("\t\t1.按学号升序排序\n");
            printf("\t\t2.按学号降序排序\n");
            keydown4();
            break;
        case 7:
            printf("----------------【学生通讯信息统计】----------------\n");
            printf("\t\t1.统计各班人数\n");
            printf("\t\t2.统计各省份人数\n");
            keydown5();
            break;
        default:
            printf("选择错误，请重新输入......\n");
            system("pause");
    }
    writeInFromFile(list,"student.txt");
}
void keydown1(){
    int choice = 0;
    scanf("%d",&choice);
    struct student data;
    switch(choice){
        case 1:
            printf("----------------【按学号查询】----------------\n");
            printf("请输入学号：");
            scanf("%d",&data.num);
            searchInfoByNum(list,data.num);
            break;
        case 2:
            printf("----------------【按姓名查询】----------------\n");
            printf("请输入姓名：");
            scanf("%s",data.name);
            searchInfoByName(list,data.name);
            break;
        case 3:
            printf("----------------【按班级查询】----------------\n");
            printf("请输入班级：");
            scanf("%d",&data.class);
            searchInfoByClass(list,data.class);
            break;
        default:
            printf("选择错误，请重新输入......\n");
            system("pause");
            break;
    }
}
void keydown2(){
    struct student data;
    int choice = 0;
    scanf("%d",&choice);
    switch(choice){
        case 1:
            printf("----------------【按学号删除】----------------\n");
            printf("请输入删除学生的学号：\n");
            scanf("%d",&data.num);
            deleteNumNode(list,data.num);
            break;
        case 2:
            printf("----------------【按姓名删除】----------------\n");
            printf("请输入删除学生的姓名：\n");
            scanf("%s",data.name);
            deleteNameNode(list,data.name);
            break;
        default:
            printf("选择错误，请重新输入......\n");
            system("pause");
            break;
    }
}
void keydown3() {
    struct student data;
    int choice = 0;
    scanf("%d", &choice);
    switch (choice) {
        case 1:
            printf("----------------【按学号查找并修改】----------------\n");
            printf("请输入需要修改学生的学号：\n");
            scanf("%d", &data.num);
            alterNumNode(list, data.num);
            break;
        case 2:
            printf("----------------【按姓名查找并修改】----------------\n");
            printf("请输入需要修改学生的姓名：\n");
            scanf("%s", data.name);
            alterNameNode(list,data.name);
            break;
        default:
            printf("选择错误，请重新输入......\n");
            system("pause");
            break;
    }
}
void keydown4(){
    int choice = 0;
    scanf("%d", &choice);
    switch (choice) {
        case 1:
            printf("----------------【按学号升序排序】----------------\n");
            sortUp(list);
            break;
        case 2:
            printf("----------------【按学号降序排序】----------------\n");
            sortDrop(list);
            break;
        default:
            printf("选择错误，请重新输入......\n");
            system("pause");
            break;
    }
}
void keydown5(){

    int choice = 0;
    scanf("%d", &choice);
    switch (choice) {
        case 1:
            printf("----------------【统计各班人数】----------------\n");
            countClass(list);
            break;
        case 2:
            printf("----------------【统计各省份人数】----------------\n");
            countProvince(list);
            break;
        default:
            printf("选择错误，请重新输入......\n");
            system("pause");
            break;
    }
}
//录入
void insertNodeByHead(struct Node* headNode,struct student data)
{
    struct Node* newNode = createNode(data);
    newNode->next = headNode->next;
    headNode->next = newNode;
}
//浏览
void printList(struct Node* headNode){
    struct Node* pMove = headNode->next;
    printf("学号\t姓名\t班级\t地址\t电话\t\tQQ\n");
    while (pMove){
        printf("%d\t%s\t%d\t%s\t%s\t%s\n",pMove->data.num,pMove->data.name,pMove->data.class,pMove->data.addr,pMove->data.tel,pMove->data.QQ);
        pMove = pMove->next;
    }
    printf("\n");
}
//按学号查询
void searchInfoByNum(struct Node* headNode,int num){
    struct Node* pMove = headNode;
    while (pMove){
        if(pMove -> data.num == num){
            printf("学号\t姓名\t班级\t地址\t电话\t\tQQ\n");
            printf("%d\t%s\t%d\t%s\t%s\t%s\n", pMove->data.num, pMove->data.name, pMove->data.class, pMove->data.addr,
                   pMove->data.tel, pMove->data.QQ);
            break;
        }
        pMove = pMove -> next;
    }
    if(pMove == NULL){
        printf("学号不存在，无法查找！\n ");
        return ;
    }

}
//按名字查询
void searchInfoByName(struct Node* headNode,char *name){
    struct Node* pMove = headNode;
    while (pMove){
        if(strcmp(pMove -> data.name,name) == 0){
            printf("学号\t姓名\t班级\t地址\t电话\t\tQQ\n");
            printf("%d\t%s\t%d\t%s\t%s\t%s\n", pMove->data.num, pMove->data.name, pMove->data.class, pMove->data.addr,
                   pMove->data.tel, pMove->data.QQ);
            break;
        }
        pMove = pMove -> next;
    }
    if(pMove == NULL){
        printf("名字不存在，无法查找！\n ");
        return ;
    }
}
//按班级查询
void searchInfoByClass(struct Node* headNode,int class){
    struct Node* pMove = headNode;
    printf("学号\t姓名\t班级\t地址\t电话\t\tQQ\n");
    while (pMove){
        if(pMove -> data.class == class){
            printf("%d\t%s\t%d\t%s\t%s\t%s\n", pMove->data.num, pMove->data.name, pMove->data.class, pMove->data.addr,
                   pMove->data.tel, pMove->data.QQ);
        }
        pMove = pMove -> next;
    }

    if(pMove == NULL){
        printf("班级不存在，无法查找！\n ");
        return ;
    }
}
//按学号删除
void deleteNumNode(struct Node* headNode,int num){
    struct Node* posNode = headNode -> next;
    struct Node* posFrontNode = headNode;
    while(posNode -> data.num != num)
    {
        posFrontNode = posNode;
        posNode = posNode -> next;
    }
    if(posNode == NULL){
        printf("未找学号位置，无法删除！");
        return;
    }
    else{
        posFrontNode -> next = posNode -> next;
        free(posNode);
        printf("删除成功！");
    }

}
//按名字删除
void deleteNameNode(struct Node* headNode,char *name){
    struct Node* posNode = headNode -> next;
    struct Node* posFrontNode = headNode;
    if(posNode == NULL){
        printf("名字不存在，无法删除！\n ");
        return;
    }
    while(strcmp(posNode -> data.name,name))
    {
        posFrontNode = posNode;
        posNode = posNode -> next;
    }
    if(posNode == NULL){
        printf("未找名字位置，无法删除！");
        return;
    }
    else{
        posFrontNode -> next = posNode -> next;
        free(posNode);
        printf("删除成功!");
    }

}
//按学号修改
void alterNumNode(struct Node* headNode,int num){
    struct Node* posNode = headNode -> next;
    struct Node* posFrontNode = headNode;
    while(posNode -> data.num != num)
    {
        posFrontNode = posNode;
        posNode = posNode -> next;
    }
    if(posNode == NULL){
        printf("未找该学生，无法修改！");
        return;
    }
    else{
        struct student data;
        posFrontNode -> next = posNode -> next;
        free(posNode);
        printf("请重新输入学生的学号，姓名，班级，地址，电话，QQ:\n");
        fflush(stdin);
        scanf("%d %s %d %s %s %s",&data.num,data.name,&data.class,data.addr,data.tel,data.QQ);
        insertNodeByHead(list,data);
        printf("修改成功！");
    }
}
//按姓名修改
void alterNameNode(struct Node* headNode,char* name){
    struct Node* posNode = headNode -> next;
    struct Node* posFrontNode = headNode;
    while(strcmp(posNode -> data.name,name))
    {
        posFrontNode = posNode;
        posNode = posNode -> next;
    }
    if(posNode == NULL){
        printf("未找该学生，无法修改！");
        return;
    }
    else{
        struct student data;
        posFrontNode -> next = posNode -> next;
        free(posNode);
        printf("请重新输入学生的学号，姓名，班级，地址，电话，QQ:\n");
        fflush(stdin);
        scanf("%d %s %d %s %s %s",&data.num,data.name,&data.class,data.addr,data.tel,data.QQ);
        insertNodeByHead(list,data);
        printf("修改成功！");
    }
}
//按学号升序排序
void sortUp(struct Node* headNode){
    struct Node* turn;
    struct Node* move;
    struct student temp;
    for(turn = headNode -> next;turn -> next != NULL;turn = turn -> next){
        for(move = headNode -> next;move -> next != NULL;move = move -> next){
            if(move -> data.num > move -> next -> data.num){
                temp = move -> data;
                move -> data = move -> next -> data;
                move -> next -> data = temp;
            }
        }
    }
    printList(list);
}
//按学号降序排序
void sortDrop(struct Node* headNode){
    struct Node* turn;
    struct Node* move;
    struct student temp;
    for(turn = headNode -> next;turn -> next != NULL;turn = turn -> next){
        for(move = headNode -> next;move -> next != NULL;move = move -> next){
            if(move -> data.num < move -> next -> data.num){
                temp = move -> data;
                move -> data = move -> next -> data;
                move -> next -> data = temp;
            }
        }
    }
    printList(list);
}
//统计各班级人数
void countClass(struct Node* headNode){
    int i;
    int count[N + 1] = {0};
    struct Node* pMove = headNode;
    while (pMove){
        for( i = 1;i <= N; i++){
            if (pMove->data.class == i ) count[i]++;
        }
        pMove = pMove -> next;
    }
    for (int i = 1;i <= N; i++) {
        printf("%d班的人数为：%d\n",i,count[i]);
    }
}
//统计各省份人数
void countProvince(struct Node* headNode){
    char province[34][100] = {"Hebei","Shanxi","Liaoning","Jilin","Heilongjiang","Jiangsu","Zhejiang","Anhui","Fujian","Jiangxi","Shandong","Henan","Hubei","Hunan","Guangdong","Hannan","Sichuan","Guizhou","Yunnan","Shanxi","Gansu","Qinghai","Taiwan","Neimenggu","Guangxi","Xizang","Ningxia","Xinjiang","Beijiang","Tianjing","Shanghai","Chongqing","Xianggang","Aomen"};
    int i;
    int count[34] ={0};
    struct Node* pMove = headNode;
    while (pMove){
        for( i = 0;i < 34; i++){
            if (strcmp(pMove->data.addr,province[i]) == 0 ) count[i]++;
        }
        pMove = pMove -> next;
    }
    for (int i = 0;i < 34; i++) {
        if(count[i] != 0)
            printf("地址为%s的人数为%d\n",province[i],count[i]);
    }
}
//文件读操作
void readInFromFile(struct Node* headNode,char* filename){
    struct student data;
    FILE *fp;
    fp = fopen(filename,"r");
    if(fp == NULL){
        printf("文件打开失败！");
    }
    while (fscanf(fp,"%d\t%s\t%d\t%s\t%s\t%s\n",&data.num,data.name,&data.class,data.addr,data.tel,data.QQ) != EOF){
        insertNodeByHead(headNode,data);
    }

    fclose(fp);
}
//文件写操作
void writeInFromFile(struct Node* headNode,char* filename){
    FILE *fp = fopen(filename,"w");
    struct Node* pMove = headNode -> next;
    while(pMove){
        fprintf(fp,"%d\t%s\t%d\t%s\t%s\t%s\n",pMove->data.num,pMove->data.name,pMove->data.class,pMove->data.addr,pMove->data.tel,pMove->data.QQ);
        pMove = pMove -> next;
    }
    fclose(fp);
}

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好了，大概就是这样了，后期我还增加了登录和注册功能（比较简单的），需要的小伙伴可以找我要(￣▽￣)"，如果程序上有什么问题，希望大家可以帮忙指出，我会及时更正的(☆▽☆)。
视频链接在这,老师讲得很好，大家可以看看。C/C++项目教程：学生信息管理系统，大学里老师布置的作业你会做吗？基础不牢固的赶紧学习一下。

下面这个是我测试程序用到的数据，分享给大家啦，省得大家一个个敲(～o￣3￣)～

10001 Lily 1 Beijing 13836763922 5467334567
10002 Sophia 1 Shanxi 13987654890 8894563208
10003 Olivia 1 Shanxi 19176490875 3456998711
10004 Amelia 1 Tianjin 13887490654 3746529087
10005 Freya 1 Fujian 13399878956 3647589022
10006 Aria 2 Nanjing 13399568956 3847590865
10007 Navbar 2 Guangxi 13890878956 3748598877
10008 Mila 2 Beijing 13399864956 3377287653
10009 Grace 2 Fujian 13397898956 3748595999
10010 Layla 2 Hebei 19909878956 3374727177
10011 Maryam 3 Beijing 13996328956 4758349993
10012 Willow 3 Hubei 13399878943 3894859020
10013 Elsie 3 Qinghai 13988956654 3848569652
10014 Bailey 3 Hebei 13399878546 5748399302
10015 Blew 3 Gansu 13399648956 3847539534
10016 Chukka 3 Nanjing 19176496780 5345329464
10017 Dock 4 Hebei 19176887875 3465364536
10018 String 4 Nanjing 19176490543 3246524645
10019 Fibula 4 Sichuan 19176490098 5432543465
10020 Grain 4 Sichaun 19176490567 3465236534
10021 High 4 Guizhou 19176490453 3456326455
10022 Janara 5 Taiwan 19176490875 6346456346
10023 Jannean 5 Nanjing 19176095875 3462456234
10024 Kayne 5 Beijing 19176497645 8437536754
10025 Lalaine 5 Shanxi 19176490634 6345734766
10026 Mikeia 5 Taiwan 19176478984 3475357349
10027 Mieshia 5 Sichuan 19176490556 4357347568
10028 Narali 6 Nanjing 19109890875 4373765826
10029 Enemy 6 Taiwan 19176498794 6427358754
10030 Conchie 6 Hebei 19176494444 3475684675

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