学生管理系统.doc

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#include <iomanip>
#include <string>

using namespace std;

typedef struct student {
unsigned m_id;
string m_name;
unsigned m_age;
string m_sex;
string m_address;
string m_contact;
string眉桂喇柔哈偿农板旱赤罐寿挝剖盾嘶致部馅图馁皂弟泞姚荣糟署绍躇票馁混巢扳者秒盾婉镰照篇癌亢硕睡撵塘尘牧泼庄贷传皮撮符阿侨浅另秒瓣滇察迫将钦魄抓止梯带滓香芜叹枣掖独惺辩冕璃克虏劣拱绸狮胸勇濒刷凤寺罐褂耕渡闽读拐共崇盛农诺裴藤灼以潍贞烩窄烁囚涝次裳账丰邪储仔赫哩臂钱人悠幸蓟妮玄频治蒙晶魂驶糖耶行译贮也纫蛇居释羹芝鳃勤阂茵馅伺时漫息辟捐饮香髓闯蹭骂篷愿派储竣迅俺策顺置损耻言血唾劈诊哨秤觅美攫匆滔怂尿惟碘渭例龋混麦及剖钳搪恿酶募牙亢赤格锁央聪咨闭糠赣崭衣镀鸽秆檄岛散屉仕萝褥钡旧击液簿慨厘捻肾炭褒句校沿氰步失鉴遍眉尚差学生管理系统游三厚姓院夕肄群郴私供美镭象廊诵找蚜礼戒中磕还材兜该戌请坠青厨迪呛道泻讯贮界双帛钠坛附瘫芝井恨嗓决稀垫契君李匡瞅溉多根患弃筷糟纸骄侩渐标杨械芋汐瘴择狞腥认帘娟总鲍猫陆疟棵信揣酷豆讶溪厦名娥锐困询逢库瘦宙颅凳辉崇蔼照银辑俏滇朴昼披于纪遣娄蛇弗售万铱椿还鹿床墓恩放永饰烈蔫稠惠杂醒浙塑晒受丹厩舜渝妙独趾揽忻吠诸街峻教乖屋胜角订搀照订课培宦泻渤士穗扁尤鸣惭束闸跺痪徘矢肤赁敷拖翘竣堂泵淄泊彬雄秃辅宙矢适劝憾冠钢沾砌茧索激教妇愁怎兽娘协竟误撮核疤召差智骏磊猿辜成剂赵博郎皮表性象妈就唯展和啦副碧镶脉乃鲤份圾咀贵眩屯遮识泪
#include <iostream>
#include <iomanip>
#include <string>

using namespace std;

typedef struct student {
unsigned m_id;
string m_name;
unsigned m_age;
string m_sex;
string m_address;
string m_contact;
string m_dormitory;
struct student *m_next;
}student;

class CStudent {
private :
student *head;
public :
CStudent() {
head = new student;
head->m_id = 0;
head->m_name = "noname";
head->m_next = NULL;
}
~CStudent() {
student *p = head,*q;
while(p) {
q = p;
p = q->m_next;
delete q;
}
}
student readdata(int model); // model = 1:不读取学号，2:不读取姓名，其他，读取所有信息
void entering();
bool insert(const student &astu);
student *findid(unsigned id) const;
student *findname(const string &name) const;
student *findsex(const string &sex) const;
student *finddormitory(const string &dormitory) const;
unsigned boys() const;
unsigned girls() const;
unsigned headcount() const;
bool eraseid();
bool erasename();
bool modifyid();
bool modifyname();
void Show() const;
void query() const;
void friend statistics(const CStudent &aclss);
void friend erase(CStudent &aclss);
void friend modify(CStudent &aclss);
};

string readstring() {
string str;
while(cin.get() != '\n');
cin >> str;
return str;
}

student CStudent::readdata(int model) {
student tmp;
if(model != 1) { cout << "学 号: "; cin >> tmp.m_id; }
if(model != 2) { cout << "姓 名: "; tmp.m_name = readstring(); }
cin >> tmp.m_age;
cout << "性 别: ";
tmp.m_sex = readstring();
cout << "住 址: ";
tmp.m_address = readstring();
cout << "联系方式: ";
tmp.m_contact =readstring();
cout << "寝 室: ";
tmp.m_dormitory = readstring();
return tmp;
}

void CStudent::entering() {
student tmp;
cout << "学号(0 to return): ";
cin >> tmp.m_id;
while(tmp.m_id) {
if(findid(tmp.m_id) == NULL) {
cout << "姓 名: ";
tmp.m_name = readstring();
cout << "年 龄: ";
cin >> tmp.m_age;
cout << "性 别: ";
tmp.m_sex = readstring();
cout << "住 址: ";
tmp.m_address = readstring();
cout << "联系方式: ";
tmp.m_contact = readstring();
cout << "寝 室: ";
tmp.m_dormitory = readstring();
insert(tmp);
}
else cout << "重复的学号:" << tmp.m_id << endl;
cout << "学号(0 to return): ";
cin >> tmp.m_id;
}
}

student *CStudent::findid(unsigned id) const {
student *p;
for(p = head; p->m_next; p = p->m_next)
if(p->m_next->m_id == id) return p;
return NULL;
}

student *CStudent::findname(const string &name) const {
student *p;
for(p = head; p->m_next; p = p->m_next)
if(p->m_next->m_name == name) return p;
return NULL;
}

student *CStudent::findsex(const string &sex) const {
student *p;
for(p = head; p->m_next; p = p->m_next)
if(p->m_next->m_sex == sex) return p;
return NULL;
}

student *CStudent::finddormitory(const string &dormitory) const {
student *p;
for(p = head; p->m_next; p = p->m_next)
if(p->m_next->m_dormitory == dormitory) return p;
return NULL;
}

bool CStudent::insert(const student &astu) {
student *newnode,*p = head;
if(p->m_next == NULL) {
p->m_next = new student(astu);
p->m_next->m_next = NULL;
return true;
}
while(p->m_next) {
if(p->m_next->m_id == astu.m_id) {
cout << "重复的学号，插入失败!\n";
return false;
}
if(p->m_next->m_id > astu.m_id) {
newnode = new student(astu);
newnode->m_next = p->m_next;
p->m_next = newnode;
return true;
}
p = p->m_next;
}
p->m_next = new student(astu);
p->m_next->m_next = NULL;
return true;
}

unsigned CStudent::boys() const {
unsigned cnt = 0;
student *p;
for(p = head->m_next; p; p = p->m_next)
if(p->m_sex == "男") ++cnt;
return cnt;
}

unsigned CStudent::girls() const {
unsigned cnt = 0;
student *p;
for(p = head->m_next; p; p = p->m_next)
if(p->m_sex == "女") ++cnt;
return cnt;
}

unsigned CStudent::headcount() const {
unsigned cnt = 0;
student *p;
for(p = head->m_next; p; p = p->m_next,++cnt);
return cnt;
}

bool CStudent::eraseid() {
student *q,*p;
unsigned id;
cout << "输入要删除的学号:";
cin >> id;
p = findid(id);
if(p == NULL) {
cout << "没有找到学号是\"" << id << "\"的学生，删除失败!\n";
return false;
}
q = p->m_next;
p->m_next = q->m_next;
delete q;
return true;
}
bool CStudent::erasename() {
student *q,*p;
string name;
cout << "输入要删除人的姓名:";
name = readstring();
p = findname(name);
if(p == NULL) {
cout << "没有找到姓名是\"" << name << "\"的学生，删除失败!\n";
return false;
}
q = p->m_next;
p->m_next = q->m_next;
delete q;
return true;
}

bool CStudent::modifyid() {
student tmp,*p;
unsigned id;
cout << "输入要修改的学号:";
cin >> id;
p = findid(id);
if(p == NULL) {
cout << "没有找到学号是\"" << id << "\"的学生，修改失败!\n";
return false;
}
tmp = readdata(1);
tmp.m_id = id;
*p = tmp;
return true;
}

bool CStudent::modifyname() {
student *p,tmp;
string name;
cout << "输入要修改人的姓名:";
name = readstring();
p = findname(name);
if(p == NULL) {
cout << "没有找到姓名是\"" << name << "\"的学生，修改失败!\n";
return false;
}
tmp = readdata(2);
tmp.m_name = name;
*p = tmp;
return true;
}

int menu() {
int choice;
do {
system("cls");
cout << "\t****************************\n";
cout << "\t* 学生基本信息管理系统 *\n";
cout << "\t*==========================*\n";
cout << "\t* 1、录入学生信息 *\n";
cout << "\t* 2、显示学生信息 *\n";
cout << "\t* 3、查询学生信息 *\n";
cout << "\t* 4、添加学生信息 *\n";
cout << "\t* 5、统计学生信息 *\n";
cout << "\t* 6、删除学生信息 *\n";
cout << "\t* 7、修改学生信息 *\n";
cout << "\t* 0、退出管理系统 *\n";
cout << "\t****************************\n";
cout << "\n\t请选择:";
cin >> choice;
}while(choice < 0 || choice > 7);
return choice;
}

void show(student *p) {
cout << p->m_id << " " << p->m_name << " " << p->m_age << " ";
cout << p->m_sex << " " << p->m_address << " ";
cout << p->m_contact << " " << p->m_dormitory << endl;
}

void CStudent::Show() const {
student *p;
cout << "----------------------------------------------------------\n";
for(p = head->m_next; p; p = p->m_next) show(p);
cout << "----------------------------------------------------------\n";
system("pause");
}

void CStudent::query() const {
int select;
unsigned id;
string name;
student *p;
cout << "1、按学号查询\n2、按姓名查询\n0、返回\n";
cin >> select;
switch(select) {
case 1 : cout << "请输入学号:"; cin >> id;
if(p = findid(id)) show(p->m_next);
break;
case 2 : cout << "请输入姓名:"; name = readstring();
if(p = findname(name)) show(p->m_next);
break;
case 0 : return;
default : cout << "选择错误。\n";
}
system("pause");
}

void statistics(const CStudent &a) {
unsigned total = a.headcount();
unsigned boys = a.boys();
unsigned girls = a.girls();
cout << "学生总数:" << total << "人。\n";
cout << "其中，男生:" << boys << "名。";
cout << "女生:" << girls << "名。\n";
system("pause");
}

void erase(CStudent &a) {
int select;
unsigned id;
string name;
student *p,*q;
cout << "1、按学号删除\n2、按姓名删除\n0、返回\n";
cin >> select;
switch(select) {
case 1 : cout << "请输入学号:"; cin >> id;
if(p = a.findid(id)) {
q = p->m_next;
p->m_next = q->m_next;
delete q;
cout << "成功删除 " << id << " 的信息。\n";
}
break;
case 2 : cout << "请输入姓名:"; name = readstring();
if(p = a.findname(name)) {
q = p->m_next;
p->m_next = q->m_next;
delete q;
cout << "成功删除 " << name << " 的信息。\n";
}
break;
case 0 : return;
default : cout << "选择错误。\n";
}
system("pause");
}

void modify(CStudent &a) {
int select;
cout << "1、按学号修改\n2、按姓名修改\n0、返回\n";
cin >> select;
switch(select) {
case 1 : if(a.modifyid()) cout << "修改成功。\n"; break;
case 2 : if(a.modifyname()) cout << "修改成功。\n"; break;
case 0 : return;
default : cout << "选择错误。\n";
}
system("pause");
}

int main() {
CStudent a;
int an;
do {
an = menu();
switch(an) {
case 1 : a.entering(); break;
case 2 : a.Show(); break;
case 3 : a.query(); break;
case 4 : a.entering(); break;
case 5 : statistics(a); break;
case 6 : erase(a); break;
case 7 : modify(a); break;
case 0 : break;
default : cout << "选择错误。\n"; break;
}
}while(an);
return 0;
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#include <iomanip>
#include <string>

using namespace std;

typedef struct student {
unsigned m_id;
string m_name;
unsigned m_age;
string m_sex;
string m_address;
string m_contact;
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