学生管理系统（第一写）用C语言写，单链表实现，插入，查询，浏览，修改，删除的功能源码

标题学生管理系统

#define _CRT_SECURE_NO_WARNINGS
#include <malloc.h>
#include
#include <stdio.h>
#include <stdlib.h>
#include
#include
using namespace std;

void mainmenu();

void query_by_name();

void print_student(struct student *s);

typedef struct student
{
long int num; //学号

char name[20];       //姓名int age;                //年龄char sex[10];           //性别char birthday[20];      //出生日期char address[30];     //地址long long int tele_num;     //电话char E_mail[30];        //电子邮箱地址struct student* next;   //指向下一个结构体对象的指针

}student;

//创建一个学生链表
typedef struct student_lsit{
student head;

 int count;

}s_list;

//声明一个链表
s_list list;

int count = 0;

void query_by_num(const s_list lt, const int num_01);

void query_by_name(const s_list ls);

void del(s_list* p);

void change(s_list lt);

void devise(struct student* p);

//录入一个学生的信息
void record(s_list*p)
{
int i = 0;

  student* temp = &(p->head);while (i<p->count){temp = temp->next;i++;}student* st = (student*)malloc(sizeof(student));cout << "请输入学生学号:";cin >> st->num;cout << "请输入学生姓名:";cin >> st->name;cout << "请输入学生年龄:";cin >> st->age;cout << "请输入学生性别：";cin >> st->sex;cout << "请输入学生出生日期：";cin >> st->birthday;cout << "请输入学生地址：";cin >> st->address;cout << "请输入学生电话:";cin >> st->tele_num;cout << "请输入学生邮箱：";cin >> st->E_mail;st->next = temp->next;temp->next = st;p->count++;cout << "该学生的信息为" << endl;cout << "---------------------------------------------" << endl;print_student(st);st->next = NULL;return ;

}

int strcmp_01(char* p1, char* p2) {

// 指针形参判空
if (p1 == NULL || p2 == NULL)
{printf(" 函数 int strcmp_01( char* p1, char* p2 )；有形参为空，没有继续执行的必要\n");return -1;
}int i = 0;while (p1[i] != '\0' && p2[i] != '\0')
{if (p1[i] != p2[i]){return 0;}else{i++;}
}if (p1[i] == '\0' && p2[i] == '\0')
{return 1;
}
else
{return 0;
}

}
int aa = 0;
void welcome() {
cout<<"\n±-------------------------------------------+"<< endl;
cout << “| |” << endl;
cout << “| 欢迎使用学生信息管理 |” << endl;
cout << “| |” << endl;
cout << “±-------------------------------------------+” << endl;

cout << "\n管理员初始用户名密码均为admin,您有3次输入机会！" << endl;
char userName[10];
char userPWD[10];
char Name[10] = "admin";
cout << "请输入用户名：" ;
cin >> userName;
cout << "\n" << endl;
cout << "请输入用户密码：";
cin >> userPWD;
if (strcmp_01(userName,Name)==1&&strcmp_01(userPWD,Name)==1)
{cout << "登录成功" << endl;mainmenu();
}
else
{cout << "文件错误，登录失败" << endl;aa++;if (aa>2){cout << "输入错误次数超过3次！" << endl;}else{welcome();}}
return;

}
//浏览全部信息
void displayAll(const s_list lt) {

student* temp = lt.head.next;if (lt.count==0)
{cout << "信息栏里无任何学生信息，请录入！" << endl;
}cout << std::left << setw(8) << "学号" << std::left << setw(8) << "姓名" << std::left << setw(8) << "年龄" << std::left << setw(8) << "性别" << std::left << setw(10) << "出生年月" << std::left << setw(11) << "地址" << std::left << setw(8) << "电话" << std::left << setw(12) << "E-mail" << endl;
cout << "-----------------------------------------------------------------------" << endl;
while (temp!=NULL)
{cout << std::left << setw(8) << temp->num << std::left << setw(8) << temp->name << std::left << setw(8) << temp->age << std::left << setw(8)<< temp->sex << std::left << setw(10) << temp->birthday << std::left << setw(11) << temp->address << std::left << setw(8) << temp->tele_num << std::left << setw(10) << temp->E_mail << endl;temp = temp->next;
}
cout <<"学生总数为："<< lt.count<<endl;

}
//查询
void query() {
cout << “\n±-------------------------------+” << endl;
cout << “| 按学号查询请按 1 |” << endl;
cout << “| 按姓名查询请按 2 |” << endl;
cout << “| 取消请按 0 |” << endl;
cout << “±-------------------------------+” << endl;
int b = 0;
cout << “请输入您的选择：”;
cin >> b;
switch (b)
{
case 1:
int num_01;
cout << “请输入要查询的学号：”;
cin >> num_01;
query_by_num(list,num_01);
cout << “按任意字符键返回主菜单！”;
char j;
cin >> j;
if (j) {
mainmenu();
}
break;
case 2:
query_by_name(list);
cout << “按任意字符键返回主菜单！”;
cin >> j;
if (j) {
mainmenu();
}
break;
case 0:
//mainmenu();
break;
default:
cout << “您输入的选择有误，请重新输入” << endl;
//query();
break;
}
}
//按学号查询
void query_by_num(const s_list ls,const int num_01) {
student* temp = ls.head.next;
cout << std::left << setw(8) << “学号” << std::left << setw(8) <<
“姓名” << std::left << setw(8) << “年龄” << std::left << setw(8) << “性别” << std::left
<< setw(10) << “出生年月” << std::left << setw(11) << “地址” << std::left << setw(8) << “电话”
<< std::left << setw(12) << “E-mail” << endl;
cout << “-----------------------------------------------------------------------” << endl;
int js = 0;
while (temp != NULL)
{
if (temp->num == num_01)
{
print_student(temp);
}
else {
js++;
}
temp = temp->next;
}
if (js == ls.count) {
cout << “查无此人!” << endl;
}
}
//按姓名查询
void query_by_name(const s_list ls) {
char xm[20];
cout << “请输入您要查询的学生姓名”;
cin >> xm;
student* temp = ls.head.next;
int jishu = 0;
while (temp != NULL)
{
if (strcmp_01(temp->name, xm)==1)
{
print_student(temp);
}
else {
jishu++;
}
temp = temp->next;
}
if (jishu ==ls.count ) {
cout << “查无此人！” << endl;
}
}
//删除学生的信息
void del(s_list* p) {
// 指针形参判空
if (p == NULL)
{
printf(" p == NULL\n");

 return;
}
if (p->count == 0)
{cout << "学生信息栏为空" << endl;
}
int num_02 = 0;
cout << "请输入您要删除学生的学号:";
cin >> num_02;
//student* temp =p->head.next;
student* temp = &(p->head);
int jishu = 0;
int abc = 0;int i = 0;
int j = 0;while (j < p->count)
{temp = temp->next;abc++;if (temp->num == num_02){break;}jishu++;j++;}
if (jishu == p->count) {cout << "您输入的学号不存在！";
}
else
{temp = &(p->head);while (i < abc - 1){temp = temp->next;i++;}student* dete = temp->next;temp->next = temp->next->next;free(dete);dete = NULL;p->count--;cout << "删除成功!" << endl;
}

}
//找到这个学生
void change(s_list lt) {
int xuehao;
cout << “请输入您要修改的学生学号:”;
cin >> xuehao;
student* temp = lt.head.next;
cout << std::left << setw(8) << “学号” << std::left << setw(8) <<
“姓名” << std::left << setw(8) << “年龄” << std::left << setw(8) << “性别” << std::left
<< setw(10) << “出生年月” << std::left << setw(11) << “地址” << std::left << setw(8) << “电话”
<< std::left << setw(12) << “E-mail” << endl;
cout << “-----------------------------------------------------------------------” << endl;
int js = 0;
while (temp != NULL)
{
if (temp->num == xuehao)
{

     print_student(temp);devise(temp);}else {js++;}temp = temp->next;
}
if (js == lt.count) {cout << "查无此人!" << endl;
}

}
//找到的指定学生的某个信息内容
void devise(struct student* p) {
cout << “±--------------------------------+” << endl;
cout << “| 学号请按 1 |” << endl;
cout << “| 姓名请按 2 |” << endl;
cout << “| 年龄请按 3 |” << endl;
cout << “| 性别请按 4 |” << endl;
cout << “| 出生年月请按 5 |” << endl;
cout << “| 地址请按 6 |” << endl;
cout << “| 电话请按 7 |” << endl;
cout << “| 邮箱请按 8 |” << endl;
cout << “±--------------------------------+” << endl;
int b = 0;
cout << “请输入您的选择：”;
cin >> b;
switch (b)
{
case 1:
cout << “请输入您的新学号：”;
int q;
cin >> q;
p->num = q;
cout << “修改成功” << endl;
mainmenu();
break;
case 2:
cout << “请输入您的新姓名：”;
char q1[20];
cin >> q1;
strcpy(p->name, q1);
cout << “修改成功” << endl;
mainmenu();
break;
case 3:
cout << “请输入您的年龄：”;
int q2;
cin >> q2;
p->age = q2;
cout << “修改成功” << endl;
mainmenu();
break;
case 4:
cout << “请输入您的性别：”;
char q3[10];
cin >> q3;
strcpy(p->sex, q3);
cout << “修改成功” << endl;
mainmenu();
break;
case 5:
cout << “请输入您的出生年月日：”;
char q4[30];
cin >> q4;
strcpy(p->birthday, q4);
cout << “修改成功” << endl;
mainmenu();
break;
case 6:
cout << “请输入您的地址：”;
char q5[30];
cin >> q5;
strcpy(p->address, q5);
cout << “修改成功” << endl;
mainmenu();
break;
case 7:
cout << “请输入您的电话：”;
long long int q6;
cin >> q6;
p->tele_num = q6;
cout << “修改成功” << endl;
mainmenu();
break;
case 8:
cout << “请输入您的邮箱：”;
char q7[30];
cin >> q7;

 strcpy(p->E_mail, q7);cout << "修改成功" << endl;mainmenu();break;
default:mainmenu();break;
}

}

void print_student(struct student *s) {
cout << std::left << setw(8) << “学号” << std::left << setw(8) <<
“姓名” << std::left << setw(8) << “年龄” << std::left << setw(8) << “性别” << std::left
<< setw(10) << “出生年月” << std::left << setw(11) << “地址” << std::left << setw(8) << “电话”
<< std::left << setw(12) << “E-mail” << endl;
cout << “-----------------------------------------------------------------------” << endl;
cout << std::left << setw(8) << s->num << std::left <<
setw(8) << s->name << std::left << setw(8) << s->age << std::left << setw(8)
<< s->sex << std::left << setw(10) << s->birthday << std::left << setw(11) << s->address
<< std::left << setw(8) << s->tele_num << std::left << setw(10) << s->E_mail << endl;
}

void mainmenu() {
cout << “温馨提示：为确保您的操作得到保存，请按正常顺序退出系统^_” << endl;
cout << “\t\t±--------------------------+” << endl;
cout << “\t\t+ 学生信息管理系统 |” << endl;
cout << “\t\t±--------------------------+” << endl;
cout << “\t\t+ [1]----录入学生信息 |” << endl;
cout << “\t\t+ [2]----浏览学生信息 |” << endl;
cout << “\t\t+ [3]----查询学生信息 |” << endl;
cout << “\t\t+ [4]----删除学生信息 |” << endl;
cout << “\t\t+ [5]----修改学生信息 |” << endl;
cout << “\t\t+ [0]----退出系统 |” << endl;
cout << “\t\t+········*·+” << endl;
cout << “\t\t±--------------------------+” << endl;

 int a = 0;cout << "请输入您的选择：";cin >> a;switch (a){case 1:record(&list);mainmenu();break;case 2:displayAll(list);cout << "按任意字符键返回主菜单！";char j;cin >> j;if (j) {mainmenu();}break;case 3:query();break;case 4:del(&list);mainmenu();break;case 5:change(list);break;case 0:break;default:cout << "您输入的选项有误,请重新输入！" << endl;mainmenu();break;}

}

int main()
{
welcome();
return 0;
}

// work_01.cpp : 此文件包含 “main” 函数。程序执行将在此处开始并结束。
//
#define _CRT_SECURE_NO_WARNINGS
#include <malloc.h>
#include
#include <stdio.h>
#include <stdlib.h>
#include
#include

using namespace std;